Maskeliya Oya

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Maskeliya Oya
Maskeliya River
MaskeliyaOya-SriLanka-1.jpg
Downstream view of the Maskeliya Oya, as seen from near the Polpitiya Hydroelectric Power Station.
Physical characteristics
Source Peak Wilderness Sanctuary
Mouth Kelani River
  location
Kalugala
  coordinates
06°58′58″N80°27′00″E / 6.98278°N 80.45000°E / 6.98278; 80.45000 Coordinates: 06°58′58″N80°27′00″E / 6.98278°N 80.45000°E / 6.98278; 80.45000
Length40 km (25 mi)

The Maskeliya Oya (translated into Maskeliya River from Sinhala) is a major upstream tributary of the Kelani River. The tributary measures approximately 40 km (25 mi) in length, originating from the hills of the Peak Wilderness Sanctuary, before passing through the Maskeliya Reservoir. Maskeliya Oya converges with the Kehelgamu Oya at Kalugala, forming the 100 km (62 mi) long Kelani River. The river is heavily used for hydroelectric power generation. [1] [2]

Contents

Features on the river

The following table lists the major features along the Maskeliya Oya, from its origins further upstream. Some dams hold back water, and transfer a percentage of it to hydroelectric power stations located further downstream, via tunnels.

TypeSubject Location
Waterfall Fairlawn Falls 06°46′20″N80°37′20″E / 6.77222°N 80.62222°E / 6.77222; 80.62222 (Fairlawn Falls)
Reservoir Maskeliya Reservoir 06°49′47″N80°33′40″E / 6.82972°N 80.56111°E / 6.82972; 80.56111 (Maskeliya Reservoir)
Dam Maskeliya Dam 06°50′37″N80°32′56″E / 6.84361°N 80.54889°E / 6.84361; 80.54889 (Maskeliya Dam)
Power station Canyon Hydroelectric Power Station 06°52′09″N80°31′40″E / 6.86917°N 80.52778°E / 6.86917; 80.52778 (Canyon Hydroelectric Power Station)
Dam Canyon Dam 06°52′18″N80°31′34″E / 6.87167°N 80.52611°E / 6.87167; 80.52611 (Canyon Dam)
Waterfall Laxapana Falls 06°53′57″N80°30′03″E / 6.89917°N 80.50083°E / 6.89917; 80.50083 (Laxapana Falls)
Power station New Laxapana Hydroelectric Power Station 06°55′05″N80°29′31″E / 6.91806°N 80.49194°E / 6.91806; 80.49194 (New Laxapana Hydroelectric Power Station)
Power station Old Laxapana Hydroelectric Power Station 06°55′07″N80°29′30″E / 6.91861°N 80.49167°E / 6.91861; 80.49167 (Old Laxapana Hydroelectric Power Station)
Dam Laxapana Dam 06°55′08″N80°29′22″E / 6.91889°N 80.48944°E / 6.91889; 80.48944 (Laxapana Dam)
Power station Polpitiya Hydroelectric Power Station 06°58′40″N80°27′24″E / 6.97778°N 80.45667°E / 6.97778; 80.45667 (Polpitiya Hydroelectric Power Station)
Dam Broadlands Dam 06°58′43″N80°27′16″E / 6.97861°N 80.45444°E / 6.97861; 80.45444 (Broadlands Dam)
Confluence Kelani River 06°58′58″N80°27′00″E / 6.98278°N 80.45000°E / 6.98278; 80.45000 (Confluence of Kehelgamu Oya and Maskeliya Oya)

See also

Related Research Articles

Kelani River

The Kelani River is a 145-kilometre-long (90 mi) river in Sri Lanka. Ranking as the fourth-longest river in the country, it stretches from the Sri Pada Mountain Range to Colombo. It flows through or borders the Sri Lankan districts of Nuwara Eliya, Ratnapura, Kegalle, Gampaha and Colombo. The Kelani River also flows through the capital of Sri Lanka, Colombo, and provides 80% of its drinking water.

Laxapana Falls

Laxapana Falls is 126 m (413 ft) high and the 8th highest waterfall in Sri Lanka and 625th highest waterfall in the world. It is situated in Maskeliya area in Nuwara Eliya District, about 16 km (9.9 mi) from Maskeliya town on Maskeliya-Norton Bridge road, in a village called Kiriwan Eliya. It is formed by Maskeliya Oya near the confluence of Kehelgamu Oya and Maskeliya Oya which forms Kelani River. The falls gives its name to twin hydroelectric power stations, Old Laxapana Power Station which generates 50 MW of electricity and New Laxapana Power Station which generates 100 MW.

Samanala Dam Dam in Balangoda

The Samanala Dam is a dam primarily used for hydroelectric power generation in Sri Lanka. Commissioned in 1992, the Samanalawewa Project is the third-largest hydroelectric scheme in the country, producing 405 GWh of energy annually. It was built with financial support from Japan and the United Kingdom. It is notable for a large leak on its right bank. Power production continues as planned despite the leakage, and the water from the leak now provides two thirds of the water issued by the reservoir for agriculture in downstream areas.

Broadlands Dam Dam in Kitulgala

The Broadlands Dam is a 35 MW run-of-the-river hydroelectric complex currently under construction in Kitulgala, Sri Lanka. The project is expected to be completed in 2020, and will consist of two dams, and a power station further downstream.

Randenigala Dam Dam in Rantembe, Central Province

The Randenigala Dam is a large hydroelectric embankment dam at Rantembe, in the Central Province of Sri Lanka. Construction of the dam began in November 1982, and was completed in approximately 4 years. The dam and power station was ceremonially opened by then President J. R. Jayawardene in 1986.

Rantembe Dam Dam in Rantembe, Central Province

The Rantembe Dam is a 52-megawatt hydroelectric gravity dam at Rantembe, in the Central Province of Sri Lanka. Construction of the dam began in January 1987, and was completed in April 1990 as scheduled. The dam was constructed by the German 'Joint Venture Randenigala'; a different German joint venture has built the Randenigala Dam, further upstream.

Maskeliya Dam Dam in Maskeliya, Central Province

The Maskeliya Dam is a large gravity dam at Maskeliya, in the Central Province of Sri Lanka. Along with the Castlereigh Dam, the dams are the highest point and beginning of the Laxapana Hydropower Complex, involving a number of dams, penstocks, and hydroelectric power stations. The dam creates the Maskeliya Reservoir over the route of Maskeliya Oya, a major tributary of the Kelani River, which is the 4th longest in the country.

Castlereigh Dam Dam in Hatton, Central Province

The Castlereigh Dam is a gravity dam built across the Kehelgamu Oya, a major tributary to the Kelani River, approximately 3 km (1.9 mi) south-west of Hatton, in the Central Province of Sri Lanka.

Polgolla Barrage Dam in Polgolla, Central Province

The Polgolla Barrage, is a barrage built across the Mahaweli River at Polgolla, in the Central Province of Sri Lanka. The barrage is used to increase the volume of water, for transfer to the hydroelectric power station located 8 km (5 mi) north, via penstock.

Norton Dam Dam in Norton Bridge,Central Province

The Norton Dam is a gravity dam built across the Kehelgamu Oya, which is a major tributary to the Kelani River. The dam is built at Norton Bridge, in the Central Province of Sri Lanka.

Canyon Dam (Sri Lanka) Dam in Laxapana Falls,Central Province

The Canyon Dam is a large arch-gravity dam built across the Maskeliya Oya, 4.5 km (2.8 mi) upstream of the iconic Laxapana Falls, in the Central Province of Sri Lanka. The associated power station plays a major role in the national power grid, due to its significant output. The dam is surrounded by steel structures of the substation.

Laxapana Dam Dam in LaxapanaCentral Province

The Laxapana Dam is a gravity dam built across the Maskeliya Oya, 2.8 km (1.7 mi) downstream of the Laxapana Falls, in the Central Province of Sri Lanka.

Kehelgamu Oya

The Kehelgamu Oya is a major upstream tributary of the Kelani River. The tributary measures 50 km (31 mi) in length, originating from the hills of the Horton Plains National Park, before passing through the Castlereigh Reservoir. Kehelgamu Oya converges with the Maskeliya Oya at Kalugala, forming the 100 km (62 mi) long Kelani River. The river is heavily used for hydroelectric power generation.

Kukule Ganga Dam

The Kukule Ganga Dam is a 110 m (360 ft) gravity dam built across the Kukule River in Kalawana, Sri Lanka. The run-of-river-type dam feeds an underground hydroelectric power station located approximately 5 kilometres (3.1 mi) away, via tunnel.

Gal Oya Dam Dam in Gal Oya National Park

The Gal Oya Dam is an embankment dam in the Uva Province of Sri Lanka. The dam creates one of the largest and most iconic reservoirs in the country, the Gal Oya Reservoir. Water from the reservoir is used primarily for irrigation in the Uva and Eastern provinces, in addition to powering a small hydroelectric power station. Construction of the dam and reservoir began in August 24, 1949, completing four years later in 1953.

Deduru Oya Dam Dam in Wariyapola

The Deduru Oya Dam is an embankment dam built across the Deduru River in Kurunegala District of Sri Lanka. Built in 2014, the primary purpose of the dam is to retain approximately a billion cubic metres of water for irrigation purposes, which would otherwise flow out to sea. Site studies of the dam began in 2006 and construction started in 2008. It was ceremonially completed in 2014, with the presence of the then President Mahinda Rajapaksa.

Nanu Oya

Nanu Oya is a 27 km (17 mi) long stream in the Central Province of Sri Lanka It originates from Pidurutalagala at an elevation of over 2,000 m (6,562 ft) and drains into the Kotmale Oya at an elevation of approximately 1,200 m (3,937 ft). The Kotmale Oya is a tributary of the Mahaweli River, the longest river in Sri Lanka, which finally discharges at Trincomalee after a combined distance of nearly 350 km (217 mi). The river was dammed in 1873 to create the popular Lake Gregory in Nuwara Eliya. The Nanu Oya discharges into the Kotmale Oya 2.5 km (1.6 mi) upstream of the Upper Kotmale Dam.

Uma Oya Hydropower Complex Dam in Uva Province

The Uma Oya Hydropower Complex (also internally called Uma Oya Multipurpose Development Project or UOMDP) is a irrigation and hydroelectric complex currently under construction in the Badulla District of Sri Lanka. Early assessments of project dates back to 1989, when the first studies was conducted by the country's Central Engineering and Consultancy Bureau. The complex involves building a dam across Dalgolla Oya, and channelling water over a 3,975 m (13,041 ft) tunnel to Mathatilla Oya, both of which are tributaries of the Uma Oya. At Mathatilla Oya, another dam is constructed to channel 145,000,000 m3 (5.1×109 cu ft) of water per annum, via a 15,290 m (50,160 ft) headrace tunnel to the Uma Oya Power Station, where water then discharged to the Alikota Aru via a 3,335 m (10,942 ft) tailrace tunnel. The Alikota Aru is a tributary of the Kirindi Oya.

References

  1. "Issues of Kelani River Basin" (PDF). EDM.lk. Retrieved 21 January 2014.
  2. "CEB Hydropower Generation". Ceylon Electricity Board. Archived from the original on 18 January 2014. Retrieved 18 January 2014.