User Login
: Капитальный ремонт крыши. Быстрый ремонт крыши дома своими руками. Стоимость ремонта крыши. Ремонт потолка своими руками. Качественный ремонт потолков в квартире. Ремонт подвесных потолков. Схема подключения котла отопления. Быстрое подключение котла к системе отопления. Подключение батарей отопления схема.
Продажа самодельных вездеходов. Лучшие самодельные мини вездеходы. Устройство самодельных вездеходов. Ванная комната дизайн фото. Красивый дизайн интерьера ванной комнаты. Дизайн ванной комнаты в квартире. Как начать бизнес с нуля. Лучшие идеи малого бизнеса с нуля. Новый бизнес с нуля. Самодельные квадроциклы чертежи. Как сделать самодельный квадроцикл сегодня. Самодельный квадроцикл своими руками. Стяжка пола своими руками. Быстрая и сухая стяжка пола своими руками. Как сделать стяжку своими руками.
You are here:  Home Regions

Regions

Ampara

General

Gal Oya Scheme

The First Major Multi-Purpose Irrigation Project

The Gal Oya scheme grown a course of more than 50 years brought various changes in the agriculture pattern of this area, being pioneered by the late Prime Minister Rt.Hon.D.S.Senanayake who helped bringing vast economical social change among all communities of Ampara district.

Gal Oya scheme was a first major multi-purpose irrigation project after independence. We have had gigantic irrigation and power project providing people with much more power and water, Galoya project continues to have an enduring national significance since its construction paralleled the birth of the new Sri Lankan nation. Much of our pride comes from the fact that we completed this large multi-purpose irrigation and hydro power project at our own expenses and without resort to foreign borrowings.

Rich farmer life

Gal Oya scheme inaugurated within the Wewugapattu in the historic kingdom of Digamadulla marks its prime importance among the Colonization scheme and the farmer community in this country. Galoya valley which consists of all there nations – Sinhala – Tamil and Muslims contributes heavily in the production of rice required to our country. The water pattipalaru alias inginiyagala “Galoya” and Pallanoya which ran down freely for thousand of years, got blocked by erecting a giant bunt thus cheating a massive reservoir and also after generating electricity gets into two main channels – right and left – thereby flowing down to the fertile soil now concerted to paddy tracts of vast extents credit of this whole episode goes to the Prime Minister Rt.Hon.D.S.Senanayake.

Senanayake Samudraya

Commenced : 1949
Dam Constructed : 1951 November
Storage : 770,000 acft
FSL Height : 110 ft
Free board : 12 ft
Extent : 130374 acres
No. of Farm Famillies : 52752
Cathment Area : 384 Sqmls
Multipurpose : (Irrigation, Flood Control, Domestic Water Supply, Hydro Power)
Max Height : 127 ft (Highest earth dam)
Spill bottom level : 212.00msl
No Bottom outlet

The largest Tank in the island constructed under GODB using Local fund & Rehabilitation of LB canal done in 1980-86. Rehabilitation of RB canal done in 1990-95.

 

Scheme Full Capacity (Acft.)
Head at FSL (Ft.)
Golaya 770,000
110.0

Irrigation water is provided for 120000 cultivated lands by left and right ways. Left canal way and right canal way are 32 miles in length and 22 miles in length respectively. It is not a strange thing eastern province being a flourished paddy field after prince Saddhathissa. Senanayake reservoir provides various services in addition to providing irrigation water generating electricity. Control flood in Galoya plain and aquaculture in fresh water are some of them. You can see gigantic Senanayake reservoir at the foot of Inginiyagala mountains located between Siyabalanduwa and Ampara.

Water Resources

  • The existing Gal Oya system is a multipurpose system comprising of a main reservoir. The Senanayaka Samudra, the largest in Sri Lanka has a capacity of 770,000 Acft. The nominal command area of the scheme is about 120,000 Acs. and fed from the reservoir, Generating 10MW of electrical power.
  • The power house operates only during the period of water issue (generally 08 months a year).
Irrigable Area


Canal System

Extent (Ha.) (Acs.) Extent
Division Covered
(Ha.) (Acs.)
Senanayaka Samudra 51,279 126,659
Ampara, Akkaraipattu, Sammanthurai, Kalmunai
Namal Oya Tank 1,498 3,700
Ampara
Pallan Oya Tank 1,417 3,500
Ambalanoya Tank 1,830 4,520
Ekgal Oya Tank 992 2,450
Pannalgama Tank 1,093 2,700
Tempitiya Tank 185 456
Navalaru 1,695 4,186
Pottuvil
Lahugala Tank 302 745
Rottai Tank 638 1,575
Panama Tank 272 672
Karanda Oya Tank 1,774 4,381
Radella Tank 403 995
Willoya Tank 262 647
Total 63455 156,734

 


Pannalgama Tank

Ekgaloya Tank

Ambalan Oya Tank

Pallanoya Tank

Namaloya Tank

Tempitiya Tank

Ampara Tank

Map

Landuse

This page is under construction

Schemes

This page is under construction

Projects

This page is under construction

Proposals

This page is under construction

 

Anuradhapura

General

This page is under construction

Landuse

This page is under construction

Schemes

This page is under construction

Projects

This page is under construction

Proposals

This page is under construction

 

Badulla

General

Bandarawela Range

Director of Irrigation /Badulla consists of three Divisional Irrigation Engineers Offices, namely Badulla, Kandaketiya & Mapakadawewa.

There are 17 irrigation schemes maintained by Irrigation Department, out of which 9 reservoir schemes & 8 Anicut schemes. All schemes falls into Mahaweli river basin. Largest reservoir maintained by the department is Nagadeepa reservoir, which has a capacity of 23833 ac.ft.

Total Surface Water Storage in the Range is 73.61 MCM & Command area under 17 irrigation Schemes is 9769.0 Ha.

As majority of farmers in Badulla & Kandaketiya divisions are engaged in vegetable cultivation throughout the year, the range cropping intensity is more than 2.0

Soraborawewa, Mapakadawewa & Dambarawea schemes receive Mahaweli waters.

Farmers in Mapakadawewa DIE division mainly do paddy cultivation

Map of the Bandarawela Irrigation Range/Badulla District

Scheme river basin detail

Division Scheme Extent in Acs. Stream
River Basin
Badulla Ambewela 996 Ambewela oya Mahaweli
Kandaela 225 Kande oya Mahaweli
Mahaeliya(Anicut) 540 Ellethota oya/Umaoya Mahaweli
Umaela 500 Bomurella/Umaoya Mahaweli
Thaldena(Anicut) 325 Baduluoya Mahaweli
Dambawinna(Anicut) 2004 Umaoya Mahaweli
Mathotilla(Anicut) 2300 Mathotillaoya/Uma oya Mahaweli
Kandaketiya Komarikaela(Anicut) 1680 Loggaloya Mahaweli
Bathmedilla(Anicut) 1400 Umaoya Mahaweli
Baduluoya(Anicut) 1900 Baduluoya Mahaweli
Mapakadawewa Nagadeepa 1500 Hapolaoya
Mahaweli
Mapakadawewa 500 Feeded by Mahaweli trans-basin canal Mahaweli
Dambarawa 250 Feeded by Mahaweli transbasin canal Mahaweli
Dehigama
710 Damba oya Mahaweli
Demodara 1500 - Mahaweli
Diyabanaoya(Anicut) 4200 Feeded by Mahaweli trans-basin canal Mahaweli
Sorabora 2000 Diyabanaoya spill water Mahaweli

Landuse

This page is under construction

Schemes

This page is under construction

Projects

This page is under construction

Proposals

This page is under construction

 

Batticaloa

General

There are two divisions coming under Batticaloa District, namely Rugam Division & Navakiri Division. The divisional Irrigation Engineers are responsible for operation & maintenance with the improvements in irrigation, drainage and flood protection for each scheme under their purview. Director of Irrigation of the district coordinate the functions of both div. IEE. actively & smoothly.

Irrigation schemes coming under Batticaloa District are tabulated below division wise with the extent for each scheme.

Division Scheme Extent (ha)
Rugam Unnichchai 5165
Rugam 3948
Vahanery 3441
Kaddumurivu 344
Kitulwewa 324
Wadamunai 152
Weligahakandiya 137
Punanai 628
Total 14139
Navakiri Navakiri 7087
Thumpankerny 275
Total 7362

Cultivation : Extent cultivated in the district were 46,735 Ac for Maha 2011/2012 & 47,455 Ac for Yala 2012. The histogram shows the achievements in 2012, the cropping intensity vs the cropping seasonal year (2007-2012). The cropping intensity is more than 200% noticeable in some schemes.

Diagram 01: Major Schemes

 

Diagram 02: Medium Schemes

Landuse

This page is under construction

Schemes

This page is under construction

Projects

This page is under construction

Proposals

This page is under construction

 

Colombo

General

Locations

Division / Office Co-ordinates
Director’s Office 6.949602,79.866486
Colombo 6.949602,79.866486
Gampaha 7.130872,80.027161
Kaluthara 6.622321,79.953003
Rathnapura 6.718568,80.3794
Division/Office (Major) Reservoir / Anicut Co-ordinates
Colombo Boralesgamuwa Tank (medium) 6.842408,79.902706
Thalangama Tank (medium) 6.891662,79.947681
Hettige oya L/12 (4.20 * 8.20)
Gampaha Muruthawela Scheme
L/3-(0.1 * 7.25)
Kumbaloluwa Scheme
I/22-(10.7 * 7.6)
Panugala Scheme L/2-(8.95 * 5.5)
Idellawala Scheme L/2-(4.85 x 2.45)
Morenna Scheme 7.130872,80.027161
Ketawala Scheme L/2-(6.35 X 2.25)
Thammita Scheme 6.946875,79.891205
Kotugoda Bolanda Scheme L/1-(13.5 x 4.45)
Opatha Scheme L/1-(13.5 x 1.45)
Kinigama Scheme L/7-(8.03 x 7.75)
Welikada Scheme L/2-(1.55 x 1.33)
Kaluthara Uyanwaththe Lake 6.727007,80.00669
Rathnapura Kalthota M/21(11.05*7.10)
Panamura P/6(3.50 * 3.30)
Katupath Oya M 21(6.55 * 1.35)
Wawelanda (medium) 6.335943,80.845814
P/6(4.95 * 5.00)

There are four divisions under the purview of Director of Irrigation (Western and Sabaragamuwa Provinces) namely,

  1. Colombo Division - Covers Colombo District
  2. Gampaha Division - Covers Gampaha District
  3. Kaluthara Division - Covers Kaluthara District
  4. Rathnapura Division - Covers Sabaragamuwa Province
Gravity Schemes maintained by each Division:
DIVISION SCHEME EXTENT (Ha)
Colombo Thalangama Wewa 83
Boralesgamuwa Wewa
96
Hettige Oya 688
Divisional Total
867
Kaluthara Uyanwaththa Wewa
142
Benthara RB 830
Kaluwamodara 648
Bolgoda 2426
Kaluganga 3038
Divisional Total 7084
Gamapaha Aththanagalu Oya
13 Main Anicuts
26 Pickup Anicuts
Divisional Total 4360
Rathnapura Kalthota 915
Katupath Oya 405
Panamura 658
Walalgoda
281
Hulanda Oya 97
Wellawa
140
Damme Ela 144
Batugedara 87
Divisional Total 2727
Flood Protection / Drainage / SWE Schemes

Colombo Division

Thumbowila /Attidya Dr & SWE

  • Kelani Flood Protection Scheme
  • Kelani LB MFP Scheme
  • Hettige Oya Dr. Scheme
Kaluthara Division Bentara RB Dr & SWE
  • Kaluwamodara Ela Dr.
  • Dummalamodara Ela Dr.
  • Kalu Ganga LB & RB Dr & MFP Scheme
  • Bolgoda Dr. & Flood Protection Scheme
Gampaha Division Ja ela MFP bund
  • Kelani RB MFP Scheme
  • Attanagalu oya Drainage Works

Other Tasks

Colombo Division
  • Wellawatte, Cotta road, Aththidiya and Rathmalana Housing Schemes belong to Irrigation Department (235 houses) and Irrigation Secretariat buildings maintenance works are carried out by Colombo Division.
  • Construction of Pump house at Pethiyagoda.
  • Construction of Weniwelkola Amuna
Rathnapura Division
  • Construction of Elle wewa Reservoir

Documents with historical importance

  1. Colombo Division
  2. Gampaha Division
  3. Kaluthara Division
  4. Rathnapura Division

Landuse

This page is under construction

Projects

This page is under construction

Schemes

This page is under construction

Proposals

This page is under construction

 

Galle & Matara

General

This page is under construction

Landuse

This page is under construction

Schemes

This page is under construction

Projects

This page is under construction

Proposals

This page is under construction

 

Hambantota

General

 

Irrigation in Hambantota Region is based on Menik Ganga, Kirindi Oya, Walawe Ganga, Mau Ara, Uruboku Oya and Kirama Oya.

Major Irrigation schemes in Hambantota Region are Lunugamwehera, Weheragala, Muruthawela, Kirama oya, Uruboku oya, Kekiriobada, Liyangastota (Ridiyagama Tank & WRB) and Mau Ara. Command area under Major schemes is 45,120 Acs and about 20,450 of farmer families are benefited.

When it comes to Medium Irrigation schemes in Hambantota Region, they are Pannegamuwa wewa, Tissa wewa, Debarawewa, Yoda wewa, Weerawila wewa, Bandagiriya wewa, Pattiyapola Maha wewa, Mahagal wewa, Ranmudu wewa, Pahala Andara wewa, Maha Aluthgamara wewa and Pallemaththala wewa. Command area under Medium schemes is 13,790 Acs and about 13,420 of farmer families are benefited.

1.   Lunugamwehera Reservoir Scheme

The Lunugamwehera reservoir was created by the construction of a dam across Kirindi oya. It is a homogeneous earthfill dam with a concrete, gated spillway and two irrigation sluices. Gross capacity of the reservoir at FSL is 183,795 Ac.ft. Right Bank Main Canal (RBMC) having length of 27.0 km cultivates 8,850 Acs of paddy fields & the Left Bank Main Canal (LBMC) having length of 13.0 km cultivates 4,400 Acs of paddy fields.

The total benefit area of Lunugamwehera scheme is 13,250 Acs and it provides benefits to 7,300 farmer families.

2.   Weheragala Reservoir

Weheragala Reservoir has been constructed across Menik Ganga to augment 60 MCM water annually through a 20.5 km long Trans basin canal to Lunugamwehera reservoir and to maintain 1.5 m3/s of continuous flow in downstream of Menik ganga.

3.   Muruthawela Reservoir Scheme

Muruthawela scheme comprises 3 sub schemes

3.1    Kirama Oya Scheme

Kirama Oya Scheme was constructed during the period of 1805-12. The Kirama tank at the extreme upstream of the scheme was built to serve as the water source for the scheme. Kekiriobada Reservoir having the capacity of 3500 Ac.ft has also been constructed later for this purpose. Scheme consists of 19 Anicuts across Kirama oya. Total command area is 5,286 Acs and provides benefits among 2,685 farmer families.

3.2    Uruboku Oya Scheme

Uruboku Oya Scheme consists of 9 Anicuts and 7 tanks. Irrigable area is 5,590 Acs and 2,026 farmer families are benifited.

3.3    Muruthawela LB Scheme

Muruthawela LB scheme consists of Tract I, Tract II and Tract III. Total command area is 4,200 Acs and provides benefits among 2,275 farmer families.

Liyangastota Anicut Scheme

Liyangastota Anicut was constructed in 1889 across Walawe River. Left Bank comprises two sluice bays and feeds Ridiyagama tank which is having the capacity of 21,750 Ac.ft at FSL. Benefit area is 8,497 Acs under Liyangastota Left Bank and 2,564 of farmer families are benefited. Right Bank comprises four sluice bays. Right Bank Main Canal has length of 26.76 km and cultivates 7,315 Acs, provides benefits among 2567 farmer families.

The total benefit area of Liyangastota anicut scheme is 15,810 Acs and it provides benefits among 5,130 farmer families.

Mau Ara Reservoir Scheme

Mau Ara Reservoir was constructed in 2005. Gross capacity at FSL is 33,230 Ac.ft. The length of LBMC is 19.2 km and the length of RBMC is 7.9 km. Benefit area is 2545 Acs of paddy fields and provides benefit among 1,021 farmer families.

Medium Irrigation schemes in Hambantota Region are Pannegamuwa wewa, Tissa wewa, Debarawewa, Yoda wewa, Weerawila wewa, Bandagiriya wewa, Pattiyapola Maha wewa, Mahagal wewa, Ranmudu wewa, Pahala Andara wewa, Maha Aluthgamara wewa and Pallemaththala wewa. Benefit area under Medium schemes is 13,790 Acs and about 13,420 of farmer families are benefited.

Irrigation activities in Hambantota Region are guided by the Director of Irrigation in Regional Director of Irrigation office with the support of Divisional Irrigation Engineers in Tissa Division, Hambantota Division and Weeraketiya Division and with the assistance of Mechanical Engineer in Lunugamwehera Workshop.

Tissa Division

About 24,000 Acs of paddy is cultivated in Tissa Division having Irrigation water supply by Lunugamwehera, Pannegamuwa, Tissa, Yoda, Weerawila, Debarawewa and Bandagiriya schemes.

Scheme Capacity at FSL (Ac ft) Acreage (Acs) Farmer Families
Lunugamwehera (LB & RB) 183,795 13,250 7,300
Pannegamuwa Wewa 1,000 560 667
Tissa Wewa 3,510 2,750 3,327
Debarawewa 700 945 1,143
Yoda Wewa 8,375 3,267 3,920
Weerawila Wewa 11,650 2,300 2,783
Bandagiriya Wewa 9,050 1,650 1,000
Weheragala 61,000 - -

Hambantota Division

About 18,850 Acs of Paddy is cultivated in Hambantota Division having Irrigation water supply by Ridiyagama tank, WRB, Mahagal wewa, Ranmudu wewa, Pahala Andara wewa, Maha Aluthgamara, Pallemaththala wewa and Mau ara schemes.

Scheme Capacity at FSL (Ac ft) Acreage (Acs) Farmer Families
Ridiyagama Wewa 21,750 8,497 2564
WRB - 7,315 2567
Mahagal Wewa 2,760 404 115
Ranmudu Wewa 630 172 70
Pahala Andara Wewa 1,240 210 105
Maha Aluthgamara Wewa 1,750 550 100
Pallemaththala Wewa 1,024 330 80
Mau Ara 33,230 2,545 1,021

Weeraketiya Division

About 16,250 Acs of Paddy is cultivated in Weeraketiya Division having Irrigation water supply by Muruthawela, Uruboku oya, Kirama oya, Kekiriobada, Pattiyapola Maha wewa and Udukiriwila schemes.

Scheme Capacity at FSL (Ac ft) Acreage (Acs) Farmer Families
Muruthawela 38,875 4,426 2,275
Uruboku oya - 5,590 2,026
Kirama oya 1,130 5,286 2,685
Kekiriobada 2,200 - -
Pattiyapola Maha Wewa 572.6 650 110
Udukiriwila Wewa 3,224 165 1300

The Annual Rainfall is 1018 mm in Hambantota District. About 59,100 Acs of Paddy is cultivated in both Yala & Maha season producing about 15,366,000 bushels of paddy in a year while giving benefits among 31,700 of farmer families.

Landuse

This page is under construction

Schemes

This page is under construction

Projects

This page is under construction

Proposals

This page is under construction

 

Kandy

General

IRRIGATION INFRASTRUCTURE AND WATER RESOURCES IN CENTEAL PROVINCE

Central province is responsible for maintaining and rehabilitation of all major and medium schemes in entire central province which includes administrative districts of Kandy, Matale & NuwaraEliya. The region comprised of five Divisional Irrigation Engineers office and the schemes coming under these divisions are as follow.

Division
Scheme Specified Extent in (Ha)
Minipe Division Himbiliyakada Wewa 155
Minipe Yoda Ela 6,073
Radagalpotha Ela
86
Ratne Ela 89
Kandy Division Bandar Amuna 97
Bodhi Ela 147
Gampolawewa Raja Ela 164
Kitulpe Ela 137
Lamasooriya Ela 115
Ma Ela 634
Murapola Ela 576
Udugoda Bandara Ela 117
Kehelpath Amuna 100
Dambulla Division Bellan Oya 200
Dewahuwa 946
Mahanikatuwa Wewa 81
Nalanda & Ebbanwala
Pahala Eraula 138
Wemadilla 800
Wewala Wewa 97
Dambulu Oya 243
Nuwara-eliya Division Bolagandawala Ela 104
Keenawala Ela 100
Mulhalela 172
Paragaha Arawa Ela 97
Waduwawala Ela 194
Bomuru Ela
Katumana

Minipe Division

Out of these schemes Minipe scheme is the biggest major Irrigation Project in the central province. It starts form Minipe in Kandy district and upto Handungamuwa in Matale district. It is a diversion weir built across Mahaweli River and conveys water along 74km long canal for the extent of 7020 ha.

In addition to the main canal there are four small Irrigation tank at stage III in Minipe scheme which are interconnected with each other & Minipe main canal by feeder canals. This tank complex is fed by Minipe main canal through a labyrinth of feeder canals.

Three medium schemes under this division is as follows.

  1. Rathnaella scheme
  2. Radagalpotha scheme
  3. Himbiliyakada scheme

Dambulla Division

Dambulu oya scheme

This is an anicut scheme constructed across Damdulu oya. It provides Irrigation facilities to 248 hectares by conveying through a 8.316 km long canal. There are five small tanks within the scheme and are fed by the main canal. Namely;

Name of Tank
Location at M/C
Walminigolla wewa 3+374
Siyabala wewa 4+762
Pare wewa 5+586
Saluapullana wewa   
7+956
Thumbakarawila wewa 8+316

This anicut is built across the dambulu oya natural stream receives water form Bowathenna power house under the supervision of MASL. The maximum discharge in the Dambulu oya natural stream is 100 cusecs (2.83 cumecs) and the discharge through Head Sluice of the main canal is 25 cusecs (0.70 cumecs). Though the specified extent of the scheme is 600 Acs (0248ha), Present extent is limited to 400 Acs (162 Ha) due to the dilapidated condition of the canal.

Dewahuwa scheme

This is a major scale Irrigation scheme in Galewela divisional secretariat area in Matale & Anuradhapura district and maintained by the department of Irrigation. The reservoir head works & part of the upper reaches of the Irrigable area& part of residential area is situated in the Matale revenue District of central province. The Lower reaches of the Irrigable area & balance part of the residential area come under the jurisdiction of Anuradhapura revenue District of the North Central Province.

The tank now has a capacity of 9700 acft at full supply level. At present, it provides water for the Irrigation of 945 hectares of paddy. The Irrigable area receives water form a main canal which is 15 kms long.

Wemadilla Reservoir

This reservoir is constructed across the Walamitiyawa oya. The tank now has a capacity of The Irrigable area receives water from LB main canal which is 7.4 kms long & RB main canal. This project is completed in the year 2009 with the cost of Rs.335 Mn.

Matale Division

Kandepitawela scheme

The tank now has a capacity of 2381 Acft at full supply level. At present, it provides water for the Irrigation of 300 acres of paddy. The irrigable area receives water from a main canal which is 3.0 kms long.

Construction work commenced in 2000 & completed the tank in 2005 at a cost of Rs.250 mill. D canal were constructed during the period 2005-2008.

Athirahapitiya scheme

The is an anicut scheme and it was taken over on 2012.03.23 from Agrarian services Department on the request of the farmers of the area. It contains about 300 Ac paddy land and the high length of the main canal is about 12km from Hunugala to end is Weligala.

Nuwaraeliya Division

All of these scheme are anicut schemes. During Yala season water availability is not sufficient to do 100 pddy cultivation and the other major problem in these scheme is very large number of damages due to cannel over flowing and landslides.

In addition to these very recently barack plain wewa and Katumana taken over by the Irrigation Department and Improvement of these two tanks are in progress.

The details of these schemes are given below.

Kandy Division

Bodhi Ela scheme

This is a medium scale Irrigation scheme in Hanguranketha divisional secretariat area in NuwaraEliya district and maintained by the Department of Irrigation. This is an anicut scheme and constructed by dress masonry across Belihul Oya. It provides water for the Irrigation of 380 acres of paddy. The Irrigable area receives water from a main canal which is 6 kms long.

This scheme is always affected by landslides. Due to the landslide occurred in the year 2007, this was heavily damaged and rehabilitation was done temporally for the conveyance of water in the canal. Due to this landslide and also the

Landuse

This page is under construction

Schemes

This page is under construction

Projects

This page is under construction

Proposals

This page is under construction

 

Kurunegala

Gereral

Deduru oya and Mi oya are two adjacent river basins located in the North Western Province. More than 80% of the water resources of Mi oya Basin is developed while much of the water resources in Deduru oya basin is yet to be developed. Deduru oya basin lands are almost fully developed while Mi oya basin lands  are yet to be developed especially in the lower catchment. Therefore it is planned to exploit the Deduru oya water resource in improving the productivity of existing agricultural lands under minor irrigation systems and to develop new lands in Mi oya & Deduru oya basins. Deduru oya is the fourth largest river in Sri Lanka with a catchment area of 2620 Sq. kms. Present Deduru oya discharges more than 1000 MCM of water into sea annually

Project

The project envisages construction of a 75 MCM reservoir across Deduru oya, 300 meters upstream of existing Redi Bendi Ella anicut to;

  • Augment irrigation water supplies through a network of canal system to 2400ha. of paddy lands under minor irrigation systems and to develop 600 ha. of new lands in initial reches of the proposed LB main canal for OFC cultivation under lift irrigation in Deduru oya left bank.
  • Augment irrigation water supplies to existing agricultural lands under Ridi Bendi Ella / Magalla reservoir system and provision of irrigation water to 600 ha. of stage 2 area of Magalla Reservoir Scheme by extending the existing canal system.
  • Augment irrigation water supplies to 3715 ha. of existing agricultural lands under major/medium irrigation scheme in lower Mi oya basin by diverting water from proposed Deduru oya reservoir via a trans-basin diversion canal to Inginimitiya reservoir.
  • Augment irrigation water supplies to 1000 ha. of existing agricultural lands under minor irrigation system along the trans-basin diversion canal in Deduru oya upper right bank.
  • Provide irrigation water to 400 ha. of new lands in lower reches of Mi oya Basin under stage 2 Radavi Bendi Ela anicut scheme.
  • Hydropower generation by 1.5 MW hydropower station (3 units of 0.5 MW) located just downstream of reservoir using irrigation and environmental release from the proposed reservoir

Project Cost

The costing of the project is based on quantities taken off from preliminary designs and unit costs compiled from 2001 unit rates published by Ministry of irrigation & water resource Management. The cost includes the cost of civil, electrical and mechanical works, cost of land development cost of annual operation and maintenance if irrigation headwork’s, infrastructure and hydropower station. The total cost of the project works up to Rs: 6212 Million and the break down is given in table below.

Item Amount (Rs: Million)
Main Dam 1,393.76
Spillway (Radial Gated) 410.00
LB sluice 15.30
RB sluice 16.83
LB canal incl.cross Drainage Structures 799.69
RB canal 975.00
Access Road
6.04
Powerhouse 249.35
D & F canal development 150.00
Physical contingency (15%) 602.00
Engineering & administration (10%)
401.60
Price contingency (10%) 502.00
Total excl. GST
5,521.96
GST (12.5%) 690.24
6,212.20
Benefits:

the project will generate benefits to Sri Lankan economy by way of increased agricultural production, hydropower generation and employment generation. The project benefits are estimated by calculating the incremental benefits from “without” project conditions to “with” project conditions. Increased agricultural production is due to development of 1600 ha. of new agricultural lands and due to increased cropping intensities of 9515 ha. of existing agricultural lands in Deduru oya & Mi oya basins. Annual hydropower benefits is from selling 8 GWh hydropower at Rs. 4.25 per kilowatt-hour which amount to Rs. 34 millions.

 

CHAPTER – 1

Preamble

Deduru oya and Mi oya, two adjacent river basins, are located in the North- Western quadrant of sri lanka in the dry/ intermediate zone of the country between Kala oya and Maha oya (Fig-1.1). These two rivers Deduru oya and Mi oya originate from Matale Hills and Dambulla Hills respectively in Kurunegala District and flow in a westerly direction through the Puttalam District and finally reach the Indian Ocean. The full utilization of the available water resources of these two rivers are of great importance to the people of North – Western Province.

About 80% of the surface water is already regulated and developed in Mi oya basin by (a) five medium irrigation schemes viz. Mediyawa, Ambakolawewa, Attaragalla, Palukadawela, Maha Galgamuwa; (b) one major irrigation scheme viz. Inginimitiya; and (c) more than 1100 minor irrigation tanks.

In contrast in Dedru oya basin even with the presence of 3500 minor irrigation tanks in the basin, only 30% of the surface water resource is regulated through the upper catchment reservoirs viz. Hakwatawana and Kimbulwana oya and partial regulation at Batalagoda. The basins are very low. Dedru oya discharges more than 1000 MCM of water annually to sea, mainly during flash floods. The lands in Dedura oya Basin are fully developed while lands in Mi oya basin are yet to be developed, especially in the lower catchment.

As such it is prudent to exploit the Deduru oya water resource. In improving the productivity Vs existing irrigated agricultural lands on both basin and also of main- fed systems to increase the present cropping intensities. After catering to existing schemes, the balance water resources would be utilized to provide irrigation facilities to undeveloped lands in lower Mi oya valley.

Rationale

Agriculture continues to be one of the major sectors in the Sri Lankan economy, accounting for 18% of the gross domestic product; 35% of the total employment and more than 20% of exports. It is the main source of the livelihood of the rural population, which accounts for 70% of the population. Past agricultural policy of the country was towards self-sufficiency in rice and presently the production exceeds 80% of the requirement. The food requirement is expected to increase in the next 25 years with the increase of population from present 18 to 25 million. The paddy requirement in 2005 is proposed to be about 3.33 million metric tons viz. a viz. the present production is 2.6 million metric tons.

Currently, attention is focused on the low productivity and low farm incomes in the agriculture sector especially in water deficit systems. Recent studies reveal, that in some irrigation systems; less than 50% of the income derived from irrigated agriculture and much of the family income is derived from off-farm actives. Further, it has been established that, irrigated agriculture has to ensure at least 250 man-day of employment, to be a major source of improve irrigation water availability and cropping intensity in water deficit systems.

A main feature in Deduru oya and Mi oya Basin is the cluster of small village tanks and cascade systems and anicuts which are scattered all over the basins. In these water short minor irrigation systems, the full extent under the scheme is cultivated during Maha season but only a potion is harvested, In Yala season, there is hardly any cultivation in most of the schemes, as water is not available in streams and tanks. In this region, paddy yields range from 175-300 bushels per hectare in major schemes while yields reduce to 50-200 bushels per hectare in minor schemes. This variation in yields between seasons and among types of schemes is mainly due to the degree of water availability, particularly at the end of crop seasons. Even major irrigation schemes in this region, have low cropping intensities viz. Hakwatawana, Ridibendi Ella scheme, Katawita schme and Inginimitiya scheme have cropping intensities of 1.16,1.70,1.13, & 0.8 respectively.

Kurunegala District accounts for 9% of the national population. out of the national population falling below the poverty line, 12% live in Kurunegala District. Even with relatively high poverty levels, the district has not received much investment in the irrigation sector. In contrast, Polonnaruwa District with only 2% of the national population below poverty line had received major investment in irrigation in the recent past. Present poverty alleviation strategies emphasizes on productivity improvement on land and water resources and broadening market access. A perennial source of water could be the panacea for the most of the social problems in Deduru oya and Mi oya basins as it could be utilized to improve the productivity of available resources and to enhance the livelihoods of the people in the region. Low cropping intensities, low productivity of existing croplands, low farm incomes, low living standards and unemployment are the pressing problems in the region and the proposed addresses issues to a large extent by regulating the Deduru oya water resource for advantage of Deduru oya and Mi oya Basins.

Historical Background

Since ancient times waters of Deduru oya (Jajjara Nadi) had been harnessed for irrigated agriculture and domestic purposes (Fig- 1-2) It had been dammed at a much upstream site at a location called Handapanawela to augment the Batalagoda tank. In the downstream of batalagoda tank on the banks of Deduru oya, there had been a famous anicient city, which has been so ancient it has not found a place even in the annals. Domestic water for the inhabitants of these ancient city and irrigation water for the adjoining rice fields had been provided by the Bathalagoda Tank. Though the tank builder is not known, the tank had been. In existence even in 200 BC and it had been renovated by king Kumaradasa (513-522AD) and Queen Kalyanawathie (1202-1208 AD) respectively. However there are no references to this tank after 13th century. Possibly it had been breached and repairs were undertaken only in 1890 by the Britishers.

Kimbulwana Wewa, Giriwana Wewa and Talagala Wewa built across tributaries of deduru oya viz. Kimbulwana oya, Hakwatuna oya and Thalagala Ela respectively, had been in existence in anicient times. Kibulwana Wewa and Giriwana Wewa had been constructed by king Mahasena during his reign through 277-304 AD. Kimbulwana Wewa had been improved recently and Hakwatawana Wewa had been constructed in late 1960’s where ancient Giriwana Wewa was located. Thalagala Wewa had been in existence during Yapahuwa period and later is had been breached and irrigable area and tank bed area got covered with forest and scrub. it is evident that there had been an anicut across Kimbulwana oya to augment Thalagala Wewa in ancient times though today there is hardly any trace of a tank or irrigable area of Thalagala Wewa.

During the reign of king Prakramabahu I (1153-1186 AD) Deduru oya had been harnessed by constructing major anicuts at three location viz. Kottahabadda, Sakaranijjahara and Doradattika. Kottahabadda site is the present sengal oya crossing of the padeniya- Anuradhapura road at Ebbawalpitiya and Doradattika site had been located downstream of confluence of Kimbulwana oya and Hakwatuna oya. However the purposes of first two works are being served presently by sengal oya anicut and Ridibendi Ella anicut across Dedu oya though not at: original locations and the third site had been permanent abandoned due to the emergence of other economic activities.

Landuse

This page is under construction

Schemes

This page is under construction

Projects

This page is under construction

Proposals

This page is under construction

 

Monaragala

General

Major Medium Reserviors

Muthukandiya tank (Major) 06 58’31”N 81 30’32”E
Ethimole tank
06 54’53”N
81 27’20”E
Handapanagala tank 06 39’23”N 81 08’52”E
Kotiyagala  tank 06 46’55”N 81 30’44”E
Badulu oya tank 07 10’41”N 81 15’13”E
Irrigation Infrastructure

The numerous ancient monuments and traces of irrigation tanks scattered all over Moneragala District bear historical evidence to the fact that this area had been a fertile and agriculturally productive region of ancient Srilanka. But the history of modern development does not charecterize, sufficient attention not paid toward harnessing this resource base for increasing the national production. The Impact of this has been the partial depletion of renewable resources of the district. despite this the District still has a considerable potentials for the decelopment.This District has only about 7308 ha under under medium and major irrigation schemes, which is a low figure compared to other districts in the dry zone.

The present trend in the irrigation sector in Sri lanka is  rehabilitation or restoration of existing irrigation schemes to realize it’s optimum potential.This scenario seems to be unsatisfactory in the context of irrigation development in Moneragala District, where hithero unexploited, potentially sound sites are found in abundance. The majority of the population in the District earns their living by agriculture. If the resource of the District remains unexploited a considerable section of the population will continue to live in poverty. Therefore it is necessary to develop these unutilized resources for enhancing Agricultural production and  uplift the living standards of rural population in the district.

It is envisaged to restore abandoned tank and anicut schemes in addition to bring about new schemes in the District to put many existing and new lands for the productive use throught intrer basin development projects as well as trans basin developtment projects such as Nakkala reservoir project, Nugamandiya anicut project, Kolallawattha tank project etc.

Moneragala District

Moneragala District is the second largest district in the country and it covers an area of5659 sq.km and has a population of about 430,000, people. However the district still remains to be backward compared to other districts in the country. Number of 133,739 families live in 319 GN divisions of 11 Nos DS divisions .About 40% of these families are Samurdhi beneficiries while about 85% of families earns their living by agriculture.

Moneragala district is located in the intermediate and dry zone of the Island The mean annual rainfall ranges from 1000mm southern area to 2500mm in the hils. The annual rainfall distribution experience fluctuation up to 30% above or below the mean value. This makes the storage and flow regulation  essential for for successful  crop production.

A considerable extent of land is set apart for Wild life sanctuaries, National parks and forest reserves in the district. No agricultural development is possible within these area as well as perimeter buffer zones intended to protect the wild life.

Schemes under maintenance

There are 30 Major / Medium inter provincial  Irrigation schemes in Moneragala District providing Irrigation  facilities to 7308 ha.This consists of 13 anicut & 17 Reservoirs

Bibile IE’s Division

Name of Scheme Rivera basin Irrigable Extent(ha) Capacity(MCM)
Dehiattawela Anicut
Gal Oya 296 -
Badulu Oya Gal Oya 212 2.3
Moneravana Anicut Gal Oya 93 -
Magandana Anicut Heda Oya 80 -
Total 681

Moneragala IE’s Division

Name of Scheme Rivera basin Irrigable Extent(ha) Capacity(MCM)
Muthukandiya Tank Hada Oya   
827 30.4
Kumbukkana Anicut Kumbukkan Oya 754 -
Buttala Anicut Manik Ganga 640 -
Ethimale Wewa Wila Oya 406 6.8
Saddhatiss Wewa Kumbukkan Oya 170 1.5
Kotiyagala Wewa Wila Oya 182 2.6
Hulandava Anicut Kumbukkan Oya
90 -
Yudaganawa Wewa Manik ganga 180 1.0
Total 3249

Wellawaya IE’s Division

Name of Scheme Rivera basin Irrigable Extent(ha) Capacity(MCM)
Handapanagala Weawa Kirindi Oya 400 7.2
Hambegamuwa Wewa Walawe Ganga 270 4.2
Sudupanawela Anicut Kirindi Oya 240 -
Alugalge wewa Kirindi Oya 100 0.7
Karawila,mailagama,Detagamuwa Tank Manik Ganga 160 -
Kukuranpola Anicut Manik Ganga 146 -
Kandiyapita Wewa
Walawe Ganga 144 1.4
Mallatawela Radapola Anicut Kirindi Oya 120 -
Pelwatta Anicut Manik Ganga 120 -
Halmillapillewa Tank Manik Ganga 106 1.5
Horabokka Anicut Manik Ganga 100 -
Kahakurullanpellessa Walawe Ganga 100 -
Maha Wewa Walawe Ganga 100 0.8
Debara ara Kirindi Oya 96 1.2
Dambe Wewa Kirindi Oya 92 1.4
Balaharuwa Kirindi Oya 84 0.8
Weli Oya Anicut Walawe Ganga 800 -
Gal amuna Anicut Manik Ganga 200 -
Total 3378
Granda Total 7308
On going Development

Lower Uva Medium and Minor Irrigation  Projects (LUMP)

Name of Project   
Extent benifitted(ha.)
TEC (Rs.Mn.)
Construction of Debera ara feeder canal 140 50.54
Construction of Watagala ara tank 70 49.30
Restoration of Mallipotha tank 202 212.00

Essential Rehabilitation In selected Major /Medium Irrigation Schemes

Name of Project Extent benifitted(ha.) TEC (Rs.Mn.)
Construction of field canals for Sugaladewi tank 182 62.00
Construction of Thembuara tank (Badulla District) 100 74.50
Water Resources

Moneragala District is blessed with 12 river basins, but water resources of these basins are mostly utilized by the adjoining district. The Catchment area of some of the large reservoirs (Senanayaka samudra, Udawalawe) are wholly or partiliiy within the District. But the command area are outside the district. It is evident that Moneragala District had been considered as a catchment area for the development of other districts. In addition Moneragala district had to sacrifice its land resources for the development of adjoining districts and for national parks such as Yala, Udawalawe, Lunugamveheraetc;

Following are the 12 major river basins in the District.

  • Maduru Oya
  • Mundeni Aru
  • Unnichchai
  • Gal Oya
  • Karanda Oya
  • Heda Oya
  • Wila oya
  • Kumbukkan Oya
  • Menik ganga
  • Kirindi Oya
  • Malala oya
  • Walawe ganga

The studies carried out in this district reveals that there is sufficient hydrological potential as well as soils suitable for agriculture. The catchment areas of major reservoirs such as Gal oya, Lunugamvehera and walwe are in Moneragala District and therefore there are restrictions imposed at national level with regard to the exploitation of water resources in those basins. To over come this restriction up to some extent, Memorandum Of  Understanding was signed in between Irrigation Department and District Secretary Moneragala to develop existing water resources in Moneragala district when the augmentation of Lunugamvehera was proposed.In this MOU  certain development areas were identified to implement in parallel to the Menik ganga diversion work. To implement agreed works under MOU, funds are provided through Lower Uva Medium and Minor irrigation Project (LUMP).

Landuse

This page is under construction

Schemes

Schemes under maintenance

There are 30 Major / Medium inter provincial  Irrigation schemes in Moneragala District providing Irrigation  facilities to 7308 ha.This consists of 13 anicut & 17 Reservoirs

Bibile IE’s Division

Name of Scheme Rivera basin Irrigable Extent(ha) Capacity(MCM)
Dehiattawela Anicut
Gal Oya 296 -
Badulu Oya Gal Oya 212 2.3
Moneravana Anicut Gal Oya 93 -
Magandana Anicut Heda Oya 80 -
Total 681

Moneragala IE’s Division

Name of Scheme Rivera basin Irrigable Extent(ha) Capacity(MCM)
Muthukandiya Tank Hada Oya    
827 30.4
Kumbukkana Anicut Kumbukkan Oya 754 -
Buttala Anicut Manik Ganga 640 -
Ethimale Wewa Wila Oya 406 6.8
Saddhatiss Wewa Kumbukkan Oya 170 1.5
Kotiyagala Wewa Wila Oya 182 2.6
Hulandava Anicut Kumbukkan Oya
90 -
Yudaganawa Wewa Manik ganga 180 1.0
Total 3249

Wellawaya IE’s Division

Name of Scheme Rivera basin Irrigable Extent(ha) Capacity(MCM)
Handapanagala Weawa Kirindi Oya 400 7.2
Hambegamuwa Wewa Walawe Ganga 270 4.2
Sudupanawela Anicut Kirindi Oya 240 -
Alugalge wewa Kirindi Oya 100 0.7
Karawila,mailagama,Detagamuwa Tank Manik Ganga 160 -
Kukuranpola Anicut Manik Ganga 146 -
Kandiyapita Wewa
Walawe Ganga 144 1.4
Mallatawela Radapola Anicut Kirindi Oya 120 -
Pelwatta Anicut Manik Ganga 120 -
Halmillapillewa Tank Manik Ganga 106 1.5
Horabokka Anicut Manik Ganga 100 -
Kahakurullanpellessa Walawe Ganga 100 -
Maha Wewa Walawe Ganga 100 0.8
Debara ara Kirindi Oya 96 1.2
Dambe Wewa Kirindi Oya 92 1.4
Balaharuwa Kirindi Oya 84 0.8
Weli Oya Anicut Walawe Ganga 800 -
Gal amuna Anicut Manik Ganga 200 -
Total 3378
Granda Total 7308
On going Development

Projects

Lower Uva Medium and Minor Irrigation  Projects (LUMP)

Name of Project    
Extent benifitted(ha.) 
TEC (Rs.Mn.)
Construction of Debera ara feeder canal 140 50.54
Construction of Watagala ara tank 70 49.30
Restoration of Mallipotha tank 202 212.00

Essential Rehabilitation In selected Major /Medium Irrigation Schemes

Name of Project Extent benifitted(ha.) TEC (Rs.Mn.)
Construction of field canals for Sugaladewi tank 182 62.00
Construction of Thembuara tank (Badulla District) 100 74.50

Proposals

This page is under construction

 

Polonnaruwa

General

Parakrama Samudraya Scheme

This vast water reservoir was built by King Parakramabahu-the Great (1153-1186). What you see today as the Parakrama Samudraya is only a part of his original creation. Parakrama Samudraya originally consisted of five large reservoirs separated by smaller dams to reduce the pressure on the main dam.The main five reservoirs which consist of the Parakrama Samudraya are; Thopa Wewa, Eramudu Wewa (Katu Wewa), Dumbuthulu Wewa, Kalahagala Wewa, Bhu Wewa. During restoration of the Parakrama Samudraya, the water which was supposed to come to the Thopa Wewa has started flowing to the Bhu Wewa. Present Parakrama Samudraya consists three tanks and they are Thopa Wewa, Dumbutulu Wewa, and Erabadu Wewa. These three tanks were Inter connected to form the Samudraya and this is fed by the Angemedilla anicut with its Inlet canal of 24 miles long in addition to its own catchment.After the period of King Parakramabahu, the tank dam was rehabilitated by former Prime Minister D.S. Senanayaka in 1948. Thereafter, some dam renovations were carried out by Eng.A.D.S. Gunawardana in 1979.

Minneriya Scheme

Minneriya Tank, which was built by King Mahasena (275 301AD), is equipped with two spillways. It's strong 15 meter tall dam held over 20 billion gallons of water. The water arrived from Mahaveli River, 48 kms away, along the Alahara canal built by the King Vasabha before. The one on the south spills to Agalwan Oya and other releases water to Kantale tank using a long canal presently well known MKYE through Gal Oya and it enter Kantale Tank. This created an irrigation paradise in the east. It was this growth in agriculture that opened up the massive trade with South East Asia through the Trincomalee harbour. From then onwards, Trinco harbour became one of the busiest in the region. In 1820 AD, British Inland Revenue Officer Ralf Bachaus recorded that the whole area can be irrigated if this reservoir is restored. In 1856, British Governor Henry Ward recorded that it must have been an amazing reservoir which had been built very strong. They recorded the beauty of the vegetation, the wildlife which surrounded the reservoir.

Girithale Scheme

Giritale wewa or tank is not as significant as the Minneriya tank and Parakrama Samudra, by way of the area covered, but it holds its significance as an ancient and picturesque tank built by King Agbo II.(608-618). This tank too is believed to have been renovated by King Parakramabahu the Great during his time and even in modern times, that is around 1905, the tank had been renovated to accommodate a larger area of water. In 1942 and 1952 also the reservoir had been subject to conservation measures with the objective of obtaining the water required for proposed colonization from this reservoir.

Kaudulla Scheme

Historically Kaudulla was one of the 16 irrigation tanks built by King Mahasena. Following a period of abandonment it was reconstructed in 1959. It now attracts and supports a variety of plant and animal life, including large mammals, fish and reptiles.

After the sister of the king Mahasena married a person disapproved by the king, she was banned from the palace and the newly married couple went off and established a small farming village around Kaudulla.

Meanwhile King Mahasena while building and developing the irrigation systems around the country planned a massive tank at Minneriya to support the agriculture of the area. To carry this enormous amount of water, he had to build an extra long dam. To protect this dam from breaking up by the force of the water the king was asked to make a human sacrifice to the demons/gods who protected dam.

The king hearing that his sister has given birth to a son, ordered the chief minister to sacrifice this infant on the gods. But the minister sacrificed a goat instead of the baby and informed the king that the scarification is complete. The king satisfied, built and completed one of the largest man made tanks in that time.

On the day he was to ceremonially open the floodgates, he started regretting his decision to sacrifice his own nephew. The chief minister then informed the king that indeed infant prince is still alive.

The king thrilled at the news ordered his ministers to bring his sister to the tank to show his marvelous creation and to share the joy. The sister was then escorted and was shown this gigantic tank by his brother.

Then sister laughed and told the king that she too has been busy and requested the king to follow her to show what she has been up to. The princess took her brother to a new tank, which she had built with the villagers, which was even larger than the Minneriya. This tank is what we now know as Kaudulla Tank.

Elahara Scheme

According to Mahawangsa the Elahera, King Washaba constructed Canal. This irrigation system includes a diversion structure constructed at Elahera across Amban Ganga (a tributary of Mahaweli Ganga), which starts from the foothills of Matale.

This huge canal conveyed water from this point to Minnerlya, Giritale, and Kantale reservoirs. On this long way from Elahera to Kantale, it had irrigated small tanks like lhakulu Wewa, RotaWewa, Matalu Wewa, and Konduru Wewa.

The first stretch of this canal from Elahera to Diyabeduma (where it is bifurcated to Minnerlya and Giritale) Is 20.75 long.

After 2.50 miles up the Nehinne Ela, it enters Giritale tank and the other branch, which falls into Talawatura Oya and it, enters Minneriya after 25 miles from Elahera.

Description Vote Particulars Total Allocation for 2013
Maintenance & Improvements to Buldings 282-2-2-0-2001 (11)-1 5,224,000.00
O & M Gravity works 282-2-2-1-2001 (11)-G 51,480,000.00
O & M Gravity works (Wages) 282-2-2-0-2001 (11)-2 8,600,000.00
Improvements to Departmental Roads 282-2-2-0-2001 (11)-5 3,300,000.00
Recovery Possession & safe guarding of Department lands & Reservations 282-2-2-0 -(11) -12 1,000,000.00
Management Supporting facilities for O & M 282-2-2-2001 (11) -14M 800,000.00
Electrical Installation to Department Building 282-1-1-0-2001(11)-3 500,000.00
Preventive Maintenance 282-2-2-1-2001(11)-P 12,000,000.00
Improvements to Major works 282-2-2-2-2001(11)-1 4,515,000.00
Improvements to H/W for Additional safety Programme 282-2-2-0-2001-11 1,233,000.00
Improvements to Water Management 282-2-2-3-2001-11-2 1,571,110.00
Farmer Organization Development 282-2-2-0-2001-8 168,775.00
Essential Improvements & Rehabilitation of Major and Medium Irrigation Schemes 282-2-3-12-2105 34,800,000.00
Rehabilitation of Major and Medium Irrigation Schemes
152-2-3-8-2105-4 15,737,000.00
Rehabilitation of Major and Medium Irrigation Schemes (Giritale Sedel Dam) 152-2-3-8-2105-6 19,451,644.00
Estabilishment of Unit office under O & M Gravity (works) 282-2-2-12001(11) U 4,000,000.00
Flood damage repairs for ENDReP (Civil) 152-02-03-12-2502-12 100,000,000.00
Flood damage repairs for ENDReP (E & A) 152-02-03-12-2502-17 1,000,000.00
Flood damage repairs 282-2-2-0-2001-10 8,446,300.00
Maintenance of Department camps 282-2-2-0-2001-17 500,000.00
Domsopura Project 282-2-4-46-2105-(11)
150,000,000.00
Moragahakanda Project & Galserugolla 15/137 10,000,000.00
D.S.W.R.P.P 152-02-03-10-2502(14) 270,000,000.00
Bulding & Structures 152-2-3-0-2001 194,385.00
Total 704,521,214.00

Landuse

This page is under construction

Schemes

This vast water reservoir was built by King Parakramabahu - the Great (1153-1186). What you see today as the Parakrama Samudraya is only a part of his original creation. Parakrama Samudraya originally consisted of five large reservoirs separated by smaller dams to reduce the pressure on the main dam.The main five reservoirs which consist of the Parakrama Samudraya are; Thopa Wewa, Eramudu Wewa (Katu Wewa), Dumbuthulu Wewa, Kalahagala Wewa, Bhu Wewa. During restoration of the Parakrama Samudraya, the water which was supposed to come to the Thopa Wewa has started flowing to the Bhu Wewa. Present Parakrama Samudraya consists three tanks and they are Thopa Wewa, Dumbutulu Wewa, and Erabadu Wewa. These three tanks were Inter connected to form the Samudraya and this is fed by the Angemedilla anicut with its Inlet canal of 24 miles long in addition to its own catchment.After the period of King Parakramabahu, the tank dam was rehabilitated by former Prime Minister D.S. Senanayaka in 1948. Thereafter, some dam renovations were carried out by Eng.A.D.S. Gunawardana in 1979.

Parakrama Samudraya Scheme - Technical Data

Length : 12.37 km
Type : Earthen
BTL : 60.96m MSL
FSL : 59.18m MSL
Capacity : 135.36 MCM
Catchment Area : 7246.40 ha
Specified Acreage : 7948.18 ha

D1 Sluice
Sill Level : 51.51 m MSL
Type : RCC Tower
No of Opening : 4
Size of Opening : 3.5’ Dia
Maximum Discharge : 11.9 Cumecs

D2 Sluice
Sill Level : 51.82 m MSL
Type : RCC Tower
No of Opening : 1
Size of Opening : 4’X 4’3”
Maximum Discharge : 3.12 Cumecs

D3 Sluice
Sill Level : 52.82 m MSL
Type : RCC Tower
No of Opening : 1
Size of Opening : 3.0’ Dia
Maximum Discharge : 0.6 Cumecs

Radial Gated Spill Way
Crest Level : 59.18 m MSL
Type : Radial Gate
No of Gates : 1
Size of Opening : 10.0’X 8.0’
Length : 30.48m

Minneriya Tank, which was built by King Mahasena (275 301AD), is equipped with two spillways. It's strong 15 meter tall dam held over 20 billion gallons of water. The water arrived from Mahaveli River, 48 kms away, along the Alahara canal built by the King Vasabha before. The one on the south spills to Agalwan Oya and other releases water to Kantale tank using a long canal presently well known MKYE through Gal Oya and it enter Kantale Tank. This created an irrigation paradise in the east. It was this growth in agriculture that opened up the massive trade with South East Asia through the Trincomalee harbour. From then onwards, Trinco harbour became one of the busiest in the region. In 1820 AD, British Inland Revenue Officer Ralf Bachaus recorded that the whole area can be irrigated if this reservoir is restored. In 1856, British Governor Henry Ward recorded that it must have been an amazing reservoir which had been built very strong. They recorded the beauty of the vegetation, the wildlife which surrounded the reservoir.

Minneriya Scheme - Technical Data

Length of Bund : 2.33 km
Type : Earthen
BTL : 97.12 m MSL
FSL : 93.70 m MSL
Capacity : 135.30 MCM
Catchment Area : 23,983.40 ha
Specified Acreage : 8933.20 ha

Jayanthi Sluice
Sill Level : 83.82 m MSL
Type : Masonry Tower
No of Opening : 3
Size of Opening : 4’X2’8”
Maximum Discharge : 13.3 Cumecs

Raja Ela Sluice
Sill Level : 84.83 m MSL
Type : Masonry Tower
No of Opening : 1
Size of Opening : 3’X 2’6”
Maximum Discharge : 2.65 Cumecs

Agalawanoya Spill
Length : 60.96 m
Crest Level : 93.70 m MSL
Type : Radial
No of Gates : 7
Size of Gates : 20-0’X12’-6”

MKYE Spill
Length : 13.72 m
Crest Level : 93.88 m MSL
Type : 2 Radial /2 Rectangular
No of Gates : 4
Size of Gates : Radial 15’X8’ /
Rectangular 5’X4-1.5”

Giritale wewa or tank is not as significant as the Minneriya tank and Parakrama Samudra, by way of the area covered, but it holds its significance as an ancient and picturesque tank built by King Agbo II.(608-618). This tank too is believed to have been renovated by King Parakramabahu the Great during his time and even in modern times, that is around 1905, the tank had been renovated to accommodate a larger area of water. In 1942 and 1952 also the reservoir had been subject to conservation measures with the objective of obtaining the water required for proposed colonization from this reservoir.

Girithale Scheme - Technical Data

Length of Bund : 2.33 km
Type : Earthen
BTL : 94.49 m MSL
FSL : 92.05 m MSL
Capacity : 24.11 MCM
Catchment Area : 2,434.60 ha
Specified Acreage : 8933.20 ha

RB Sluice
Sill Level : 83.82 m MSL
Type : Masonry Tower
No of Opening : 3
Size of Opening : 4’X2’8”
Maximum Discharge : 13.3 Cumecs
Repairing under DSWRPP

CO type spill way –Demolished
Crest Level : 92.05m MSL
Type : C.O
Length : 38.10m
Piano key type Spill way under Construction

Current Rehabilitation Done under DSWRPP Project

Toe drain and Filter bearm of the Girithale Tank Rip Rap of the Girithale Tank Saddle Dam

Pilot Initiative to Enhance Capacity by Incorporating Piano Key Weir Concept - Giritale Tank - Minneriya Division

D/S before construction D/S after Excavation
D/S During construction D/S after construction




Historically Kaudulla was one of the 16 irrigation tanks built by King Mahasena. Following a period of abandonment it was reconstructed in 1959. It now attracts and supports a variety of plant and animal life, including large mammals, fish and reptiles.

After the sister of the king Mahasena married a person disapproved by the king, she was banned from the palace and the newly married couple went off and established a small farming village around Kaudulla.

Meanwhile King Mahasena while building and developing the irrigation systems around the country planned a massive tank at Minneriya to support the agriculture of the area. To carry this enormous amount of water, he had to build an extra long dam. To protect this dam from breaking up by the force of the water the king was asked to make a human sacrifice to the demons/gods who protected dam.

The king hearing that his sister has given birth to a son, ordered the chief minister to sacrifice this infant on the gods. But the minister sacrificed a goat instead of the baby and informed the king that the scarification is complete. The king satisfied, built and completed one of the largest man made tanks in that time.

On the day he was to ceremonially open the floodgates, he started regretting his decision to sacrifice his own nephew. The chief minister then informed the king that indeed infant prince is still alive.

The king thrilled at the news ordered his ministers to bring his sister to the tank to show his marvelous creation and to share the joy. The sister was then escorted and was shown this gigantic tank by his brother.

Then sister laughed and told the king that she too has been busy and requested the king to follow her to show what she has been up to. The princess took her brother to a new tank, which she had built with the villagers, which was even larger than the Minneriya. This tank is what we now know as Kaudulla Tank.

Kaudulla Scheme - Technical Data

Length of Bund : 9.23 km
Type : Earthen
BTL : 76.81 m MSL
FSL : 73.15 m MSL
Capacity : 127.92 MCM
Catchment Area : 2,588.00 ha
Specified Acreage : 5060.72 ha

High level Sluice - LB
Sill Level : 65.53 m MSL
Type : Tower
No of Opening : 3
Size of Opening : 3’9”X3’9”
Maximum Discharge : 6.62 Cumecs

Low level Sluice -RB
Sill Level : 64.01 m MSL
Type : Tower
No of Opening : 1
Size of Opening : 4’ Dia
Maximum Discharge : 6.204 Cumecs

Radial Gated Spill Way
Crest Level : 73.15 m MSL
Type : Radial Gate
No of Gates : 12
Size of Gates : 6.096m X3.66m
Length : 79.86 m

According to Mahawangsa the Elahera, King Washaba constructed Canal. This irrigation system includes a diversion structure constructed at Elahera across Amban Ganga (a tributary of Mahaweli Ganga), which starts from the foothills of Matale.

This huge canal conveyed water from this point to Minnerlya, Giritale, and Kantale reservoirs. On this long way from Elahera to Kantale, it had irrigated small tanks like lhakulu Wewa, RotaWewa, Matalu Wewa, and Konduru Wewa.

The first stretch of this canal from Elahera to Diyabeduma (where it is bifurcated to Minnerlya and Giritale) Is 20.75 long.

After 2.50 miles up the Nehinne Ela, it enters Giritale tank and the other branch, which falls into Talawatura Oya and it, enters Minneriya after 25 miles from Elahera.

Elahara Scheme - Technical Data

Catchment Area : 772.0 Sq mile (Amban Ganga River Bain)
Command Area : 6700ha in Sys G Elahara and feed to Minneriya & Girithale
Crest length/Level
New Anicut -Direct Weir : 4/5.600m - 138.84m MSL
Old Anicut-Ogee Section : 122.50 m - 138.74m MSL
Weir Trapezoidal : 54.88 m - 140.03m MSL
Sill Level
LB River outlet sill : 133.23m MSL
LB EMYE sluice sill : 133.84m MSL
No of Bays : 04 Nos
No of Gates & Size of Gates
LB River outlet : 2/3.05m X 1.52m
LB EMYE sluice : 2/3.55m X 2.44m
Length of Main Canal : 32.25 km Up to Diyabeduma

Projects

Current Rehabilitation Done Under DSWRPP Project

Parakrama Samudraya
Rip Rap of the Parakrama Samudraya Loading Bearm of the Parakrama Samudraya
Minneriya Tank
Toe drain and Filter bearm of the Minneriya Tank Rip Rap of the Minneriya Tank
Kaudulla Tank
Toe drain and Filter bearm of the Kaudulla Tank Inspection step of the Kaudulla Tank

Tentative Estimated Cost Rs. 25 Million
Objectives : Regularize the illegal water usage within first 5 km in Giritale feeder canal
Benefits : Due to regularizing these lands, no additional quantity of water is required but current usage can be reduced

Introduction

Elahera Minneriya Yoda Ela (EMYE) having a total length of 32 km from Elahera Anicut serves as the principal conveyance canal to distribute Mahaweli diversion to system G, D & E areas.

From the bifurcation structure located at 32+000 km of EMYE (Diyabeduma), Girithale Tank is fed by “Girithale Feeder Canal” which has a total length of 15 km.

1st 5 km of this feeder canal is a man made canal with a capacity of 500 cusec.

During this 1st 5km there are 23 illegal tapping points & cultivate 660 acs since early 80’s.

Command Area & Water Issues

  • 335 acs are cultivated by direct canals off Girithale feeder canal from 20 points
  • Another 325 acs are cultivated via three minor tanks named “Ihala Siyabalagas Wewa, Pahala Siyabalagas Wewa and Beddepanwila Wewa which are having command area of 175acs, 125acs & 25acs respectively
  • These three tanks are fed by three illegal canals & drainage water of Nehinna area
  • In addition to that another minor tank named Katukeliyawa Wewa is getting drainage water from these lands and command area under this tank is 90 ac
  • Water flows through these 23 canals every time when there is water in Girithale feeder canal as there are no any control system and the quantity is nearly 7500 acft/season

Rehabilitation Works Needed

  • Construction of three Regulators at 2+300, 3+800 & 4+650 km
  • Construction of 15 turnouts off Girithale feeder canal. (Current 23 tapping points can be reduced to 15)
  • Rehabilitation/Construction of canal System

Objectives : Extension and Improvements of Irrigation System in Kaudulla Division
Benefits : Providing Irrigation facilities for 962 Acs. Extention of L.B Main canal of Kaudulla Tank from 4+500km up to Bebiyawewa and Improvements of Damsopura tank and canal system

Arial View of the Project

Present Condition

50% of the low lands in the proposed project do rain fed cultivation and irrigation water obtained from temporary anicuts constructed in natural drainages.

Proposed Irrigable area

No. of Tanks Completed : 05
No. of Tanks Ready for Construction : 06
Length of Excavation Completed of Branch Canal 2 : 04 km

Proposed Site Plan

Tentative Estimate Cost : Rs.100.00 mil
Objectives :
  • Cultivate 212Acs in Heeratioya Scheme During Yala Season. (Heeratioya-Medium Anicut Scheme under Elahara Division).
  • Provide water source for Wildlife in Girithale Minneriya Wild Life Reservation.
  • Helps to Control Drainage water which flows to the EMYE from  Heeratioya Catchment.
Beneficiaries : 109 Nos Farmer Families Under the Heerati Oya Scheme

Proposals

This page is under construction

 

Puttalam

General

Office of the Director of Irrigation – Puttalam

Office of the director of Irrigation covers Puttalam District which has populations 786,938 of 192,634 families. The District consists of 16 Divisional Secretary areas and 548 Grama Niladari Wasams. There are two Divisional Irrigation Engineer’s offices, Puttalam and Inginimitiya. Two major schemes Thabbowa & Inginimitiya and 23 medium irrigation schemes are in the District. Irrigable area under the irrigation schemes in the District is 16,138 Acs. Two major reservoirs are Thabbowa and Ingginimitiya.

Inginimitiya Reservoir
Latitude - 070 56’ 15.25’’ N
Longitude - 800 08’ 08.59’’ E
Tabbowa Reservoir
Latitude - 080 04’ 20.18’’ N
Longitude - 790 56’ 28.17’’ E

The Irrigation Infrastructure and Water Resources in the District

Water Resources

The Northern boundary of Puttalam district is Kalaoya and the Southern boundary is Mahaoya. The other major river basins are Meeoya and Deduruoya basin. The Inginimitiya and Tabbowa tanks and Pawattamaduwa anicut & Wattakandal anicut are situated in the Meeoya basin. The Karawita tank and Sengaloya tank complex are fed from Deduruoya waters.

Neela Bemma scheme and Eluwankulama tank uses Kalaoya waters.

Inginimitiya Irrigation Scheme

Inginimitiya dam is built across Mee Oya, where the Inginimitiya minor tank previously existed. Prior to the construction of Inginimitiya dam in 1982 there were several minor tanks in the surrounded area. Around 760 hectares were cultivated with paddy using the water of these minor tanks. These tanks were combined into the Inginimitiya tank and the command area was expanded. The Dam was built by Sri Lankan Engineers of the irrigation department. The project was funded by Japanese agency called O.E.C.F.I. Total project cost was 360, millions rupees. The dam is made of homogeneous earth fill embankment of 4880 meters in length and maximum height of 18 meters. The Inginimitiya reservoir covers 1800 hectares at full supply level and provides water to 2650 hectares of paddy cultivation in Yala & Maha seasons. Its primary purpose is Irrigation. The water is provided to commend area through three sluices located at three places of dam right bank, centre and left bank. The spill way is located at the 3+180 and the spill way consists of 7.62m x 7.01m six electrically operated radial gates. The length of the spill way is 53m and its can discharge 1680 cumec.

Inginimitiya reservoir scheme is operated & maintained by Irrigation Department with the co-operation of farmers. The colonies in the scheme were established in Puttalam district, by settling the people who evacuated from the village during the restoration of the tank. The colonization had been completed by settling 2138 farmers by allocating 1 hectares of paddy & 0.2 hectares of high land of each.

The first water issue under the scheme was done in yala 1985 and since then agricultural activities have been continued. Since then no rehabilitation works has been done to the system for more than 27 years and system needs an immediate rehabilitation in case of proper functioning.

Scheme Location

Inginimitiya is situated in Eastern part of Puttalam district of north-western province. This tank is located in the topographical map of Sri Lanka by coordinates -35(129100E, 301750N).

Access

The tank can be reached by proceeding along Kurunagala - Anuradapura road, up to Galgamuwa Puttalam road junction and turning left and proceeding along the tarred road leading to Nanneriya junction and turn left, proceed for about 6 km to the tank head works.

Reservoir Data

River Basin - Mee Oya
Gross Catchment Area - 556 sq. km
Catchment Area intercepted at Abakola Wawa - 168 sq. km
Net Catchment Area - 388 sq. km
High Flood Level (H.F.L) - 62.18m M.S.L
Full Supply Level (F.S.L) - 61.87m M.S.L
Minimum Operation Level - 56.33m M.S.L
Capacity at H.F.L - 78.2 MCM
Capacity at F.S.L (Gross Capacity) - 72.6 MCM
Dead Storage - 6.1 MCM
Effective Storage - 66.5 MCM
Operation Capacity - 61.3 MCM
Area at H.F.L - 1900 ha
Area at F.S.L - 1500 ha

Main Canal Data

Tabbowa Tank

It is believed that Tabbowa tank has been constructed by the King Agbo the second who has ruled Sri Lanka from 632AD to 648 AD. The Tabbowa tank is situated in the Karuwalagaswewa Divisional Secretary’s area and it is the largest tank belongs to the Divisional Irrigation Engineer-Puttalam. The cathment area of Tabbowa tank is 388.35 Sq. miles and the capacity at FSL is 15400 Ac ft. The specified irrigable area is 2092 Acs.

This dam has been restored in 1920, 1950 and 1982/83. The rehabilitation of this dam commenced in 2011 under DSWRP Project and 70% of work is completed now. Two main sluices RB and LB were completely replaced by new 2 sluices. The sluice gate of the middle sluice has been replaced.

The spillway of Tabbowa tank consists of 20 Nos radial gates of gate sizes 20ft by 5ft. After recent rehabilitation, the tank was filled up to the FSL level for the last Maha season after 5years, and whole irrigable area was cultivated with paddy.

From the Past to the Present

  • 1912-1920: Construction began under an Eng: Hilman
  • 1927: Construction completed
    Irrigation facilities provided
  • Built across a main stream of the Mee Oya valley called Nanneri Oya
  • The capacity has been increased twice in 1969 and 1982.

Landuse

This page is under construction

Schemes

This page is under construction

Projects

This page is under construction

Proposals

This page is under construction

 

Trincomalee

General

Irrigation Infrastructure and Water Resources

Trincomalee District has been graced by the bounty of nature. The longest river in Srilanka, Mahaweli Ganga, mixes with sea in Koddiyaram bay of Trincomalee. In addition to this another Perennial river Yan Oya too mixes with sea in Pulmoddai Trincomalee. (Yan Oya Starts from Sigiriya hills) and have a length of 94 miles.

It is the general pattern of river to branch out in to many rivulets before reaching sea. Mahaweli river too has the same pattern and many tributaries of Mahaweli River enriching the soils of Trincomlaee.

In addition to the above there are many ephemeral rivers some of them have been tapped by construction tanks across them and some still remaining to be tapped. Ephemeral streams of Trincomalee are as follows

  • Kanthai aru
  • Panna oya
  • Palampottaru
  • Pankulam aru
  • Kunchikumban aru
  • Palakutta aru
  • Mee oya

There are four major tanks in Trincomlaee district as follows.

  • Kantale
  • Vendarasan
  • Morawewa
  • Mahadivulwewa

When it comes to medium tanks Peramaduwa, and Wanela are Maintained by Irrigation Department and Provincial Irrigation Department maintains 6 No-of medium tanks.

There are around 475 nos. of Minor tanks which are maintained by Agrarian Services Department which Scattered in the entire Trincomalee District.

Mahaweli River flows to the sea in Trincomalee district. When the accelerated Mahaweli Development Project was planned, Trincomalee area was selected to be developed as ‘System A’. Unfortunately due to the conflict, that development did not take place. Now time has ripen to consider the ‘System A’ Proposal which is expected to solve the drought faced during ‘Yala’ season and flood menace that is confronted during rainy season.

Except Mahadivulwewa, other three tanks were constructed in the ancient periods and underwent major rehabilitation. Kantale tank which was constructed by “King 2nd Aggabodhi II” and some improvements were done by king Parakramabahu the great. Further this tank was rehabilitated during English regime in year 1875 and subsequently by Irrigation Department. Morawewa tank is also an ancient tank and was modernized in 1964 by undertaking a blocking out of lands. Mahadivulwewa was newly constructed in 1978 by Irrigation Department.

Both Morawewa and Mahadivulwewa are in the same basin and Morawewa is constructed across Moraoya and Mahadivulwewa has been constructed across Neluoya-a tributary of Moraoya.

Allai scheme was developed stage by stage since 1875 up to 1967 when it was commissioned in the present status. Verugal Anicut (Mada sorowuwa) was first constructed in 1875 and Mavilaru Redial gate was constructed in 1940 and finally the 1000ft causeway was constructed. Present Raja Ela drainage was the earlier Kallar River. Later during blocking out for Allai scheme it was converted as the Major drainage Allai Scheme.

Future Development at Water Resources in Trincomalee District

Most of the water resources have been tapped in Trincomalee district. However there is potential for water resources development in Trincomalee. Identified sources are

Kaluganga Reservoir in Kantale : This starts at the downstream of Peramadu tank and flows to Janaranjanawewa. During rainy season large quantity of water flows to sea which could be made use of. It is proposed to construct a reservoir across Kaluganga closer to sugar factory and issue water to Thampalagamuwa area which is now fed by Kantale tank.
Peraru Reservoir in Kuchchaveli : proposed to be constructed at the confluence point of both Kallaru and Chiththaru, two streams in Kuchchaveli area. From the prefeasibility studies it was found that a major tank could be constructed with a capacity of 30000 acft. It is expected to provide irrigation facility to 3000ac of nearby rain fed lands.
Kallarippu Anicut in Verugal River : There is a proposal to construct a pick up anicut across Verugal river at Kallarippu and to provide water to the nearby lands.
Construction of Anicut in Rivers : There is high potential for construction many diversion or pickup anicuts across streams in this district. Recently such a proposal was made to construct pick up anicut across Pankulam aru and provide water to paddy fields in Gomarankadawela area.
Rubber Dam across Mahaweli ; This proposal is to partially divert Mahaweli river and augment a stream called “Savaaru” in Kinniya area and irrigate land in Kinniya area by construction of pickup anicuts across “Savaaru" stream. It was decided to go for partial diversion as complete diversion may change river morphology of Mahaweli river in the upstream. A full investigation survey has not yet been started. If this proposal is implemented, 3000ac of rain fed land will get irrigation facility for both Maha and Yala.
Koneswar Kulam : This is proposed to be constructed at the confluence point of Panoya and Illuppai aru which are two streams in the periyakulam area near Nilaveli. From the prefeasibility it was assessed that 1000ac of rain fed lands could be provided irrigation facility.

At present Yanoya Reservoir Project is under way. Proposed RB Channel of the Yanoya Reservoir will augment many Minor tanks in Trincomalee District and bring more new lands in the vicinity under irrigation while ensuring Maha and Yala cultivation to the Existing lands.

In addition to the above as mentioned earlier, restarting the "System A" project of Mahaweli River will protect most of the Trincomalee District from flood menace and facilitate the season for Yala cultivation.

It is proposed to augment Kantale tank by the proposed "Moragaha Kanda" Reservoir. It is expected that by 2017 we will get water to Kantale tank from "MoragahaKanda" Reservoir via MKYE canal.

Present condition of Irrigation Infrastructure

After the Conflict were over many Rehabilitation Project were commenced to restore the irrigation systems of Trincomalee. NEIAP, PEACE, RAP are some of them. All these projects pay attention to restore the supply channel systems and very less attention was paid to improve the drainage systems in the district. This caused flooding in many areas leading to crop failure and damage to properties.

Hence more attention should be paid to restore the drainage and flood protection systems in the district. Neelapola Dehiwatte flood protection bund, Rajaela and spill tail canal of Kantale tank are three typical drainage and flood protection systems that need immediate attention. In addition to the above there are many drainage canals in the district that need rehabilitation. At a time of recurring disasters, gravity of the problem caused by lack of proper drainage system could be understood.

Landuse

This page is under construction

Schemes

This page is under construction

Projects

This page is under construction

Proposals

This page is under construction

 

Vavuniya

General

Coordinates of District Directors Office, Divisional Offices & Major Reservoirs

Major Reservoirs N E
Pavatkulam 80 39’58.75” 800 24’45.38”
Iratperijatkulam 80 42’27.51” 800 29’08.51”
Rajendran kulam 80 43’58.07” 800 27’10.74”
Muhathankulam 80 37’46.85” 800 18’27.32”
Maruthamadu 80 34’37.23” 800 22’13.10”
Kal aru 80 41’29.26” 800 17’55.32”
District Directors Office & Divisional Office 80 45’02.87” 800 29’47.95”
Irrigation Infrastructures

Vavuniya Range consists of Vavuniya division. Five Tanks and one Anicut Scheme are under the Vavuniya Division which irrigates 6,775 ac of paddy lands.


Major & Medium Irrigation Schemes Under Irrigation Department (Central), Vavuniya Region

Irrigation Schemes in Vavuniya District

No Name of Scheme
Major/ Medium
Capacity (acft)
FSD (ft) Specified Command Area (ac)
River Basin
1 Pavatkulam Major 27,000 19.33 4,134 Malwathu Oya
2 Muhathankulam Medium 2,400 11.00 805 Malwathu Oya
3 Maruthamadu Medium 1,500 12.00 438 Malwathu Oya
4
Irratperiyakulam Medium 3,534 15.33 503 Malwathu Oya
5
Rajendrankulam Medium 850 12.50 295 Malwathu Oya
6 Kalaru Anicut Medium - 3.25 600 Malwathu Oya
Water Resources

General description of the district

This is a land locked district. The Eastern boundary and Southern boundary is North Central Province. North East and Northern boundary is Mullaitivu district and Western boundary is Mannar district.

This district has been divided in to the following Administrative Divisional Secretary Divisions; viz Vavuniya, Vavuniya South (Sinhala), Cheddikulam, Vavuniya North. Vavuniya is geographically important as this town is the meeting place of Kandy Jaffna road, Mannar Horowapothana Trincomalee road and this is the capital town of Vanni Region which houses the Government Agent’s Kachcheri, the base hospital and other offices of the Regional Heads of Departments.

Water resources available presently in the District

There are 629 minor tanks irrigating less that 200Acs, 22 Medium Tanks irrigating between 200Acs-2000Acs and Pavatkulam scheme the only major tank with 4000 Acs under irrigation on Kal Aru basin (tributary of Aruvi Aru). There are also two anicut schemes, one on the upper reaches of Kal Aru (boo oya) and the other lower reaches of the same river, quite a distance below tail end of Pavatkulam scheme falling under Cheddikulam D.S Division. The total irrigable extent of the district is around 50000 Acs.

The villages around Vavuniya town are formed with an irrigation tank as the center and the village homes have open dug wells, the water table of which is found from a depth of about 15ft-35ft in high areas and in places directly below the tanks the depth is around 10ft.

Drinking water potential

Vavuniya town has a water supply scheme under the purview of the water supply and drainage and water is drawn from about 7 open wells situated opposite Vavuniya Kachcheri where Vavuniya Mannar road takes off from Kandy Jaffna road. Also there is another well in the paddy fields below Vavuniya tank on the Vavuniya Poonthoddam road from which water is pumped in to bowsers for distribution.

Vavuniya district experiences acute shortage of drinking water during the dry season and the water supply to the town is not sufficient to meet the demand. There is good water resource potential for open dug wells on the banks of Per Aruand can be tapped conveniently if pickup Anicut on this river is constructed to quicken recharging. This location is at about 183km post west of Kandy Jaffna road and adjoining the village of Nochchimoddai, which is about 3 miles from Vavuniya. There is another potential site for a similar water supply wells and Anicut at about 169km post of Kandy road on Kal Aru (Boo Oya) Stream. This site is about 10km from Vavuniya.

Land use of the district (Topography, Soil, Geology and Land Use)

The Vavuniya district when compared to the land surface towards the south of the country is low but it is upland of the Northern Province and is of plateau type, sloping down towards North and West. The soil is reddish brown type generally all over with sporadic patches of heavy jungle. There are about one or two hillocks raising to about 600 ft MSL and the average ground level ranges from 300ft MSL in the east and 200ft MSL towards west and north. This district is in the dry soon at the rain fall is seasonal, heavy north east monsoon and few showers during May extremely little during the other south west monsoon season.

The people mostly are farmers engaged in paddy cultivation and recently, it has been found that there is increase in other food crops cultivation using lift irrigation from private wells.

River basins of the district and water usage

The river basins of the Northern provinces commence from the South and East boundary of this province, which is the Vavuniya district. The main river basins are Kal Aru commences from East and slopes down to feed Pavatkulam scheme and joins Aruvi Aru as one of its main tributary. There is another tributary of Aruvi Aru, Naruveli Aru stream a few miles U/S of KalAru, which feeds Muhathankulam in Cheddikulam D.S.Division.

There are two other major steams, Per Aru commencing from Mamaduwa and Kanakarayan Aru commencing from Chadavakulam minor tank about two miles South of Chemamadu medium tank. The Former River has not been tapped anywhere and the latter with a tributary feeding Kanagarajan Kulam medium tank ultimately feeds Irranamadu Tank in Kilinochchi district.

Basins Gross catchment area sq.km Amount of rain water in million m2 (Approx.) Water that flows in to the million m3 (Approx.) Percentage of water that flows in to sea out of total rain water received
Kanagarayan Aru 905 1264 240 18.9
Per Aru 841 1234 273 22.1

Photographs on current and recent past activities

Improvements to Road at Pavatkulam



 


Canal lining & Road at 1+275 to 1+710 in Centre Canal Iratperiyakulam

Canal lining at 0+700 to 1+275 in Centre Canal at Iratperiyakulam

Construction of Canal lining

 


O&M at Pavatkulam Tank Bund

O&M at Maruthamadu Tank Bund

O&M at Pavatkulam Canal

 


Cultivated Paddy Lands under Maruthamadu Scheme

Rajendrankulam Bund work - ENReP


 



Canal Lining at Rajendrankulam -ENReP

Landuse

This page is under construction

Schemes

This page is under construction

Projects

This page is under construction

Proposals

This page is under construction

 

Zones



This page is under construction



This page is under construction



This page is under construction



This page is under construction



This page is under construction

Last Updated on Monday, 10 February 2014 09:38  







Latest News

ගංවතුර පුරෝකථනය (Flood Warning)

ගංවතුර තත්වයේ පුරෝකථන නිවේදන පිළිබද දැනුවත් වීමට මෙම යොමුව මත click කරන්න.             ...
Read more

Inundation Maps & Hydrological Annual

සිතියම් සදහා Downloads => Flood Data වෙත යොමුවෙන්න. Hydrological Annual සදහා Downloads => Publicatio...
Read more

Copyright © 2017 Department of Irrigation. All Rights Reserved.
Designed by Pooranee Inspirations (Pvt) Ltd.
Last Update 17-10-2017.