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Sri Lanka is pockmarked with many irrigation dams, with its water resource distributed across nearly the entirety of the island for agricultural purposes via artificial canals and streams. Utilization of hydro resources for agricultural production dates back to the pre-Colonial era , with the current crop production now largely dependent on ...
A catchment site within the system is referred to as a wewa (වැව) in Sinhala, and this term is translated into English as "tank". [7]These tanks are connected in a series, referred to as a cascade, so that an ephemeral waterflow can be used, stored for future use, or conveyed elsewhere. [7]
Water from the reservoir is delivered to the power station via a single steel-lined tunnel with a length and diameter of 270 m (886 ft) and 6.2 m (20.3 ft) respectively. [1] The plant consists of two generators with a rated capacity of 63 MW each, powered by two francis turbines. The units were commissioned in August and September 1986 ...
The main concrete dam measures approximately 350 m (1,150 ft) and creates the Rajanganaya Reservoir, which has a catchment area of 76,863.60 hectares (189,934.1 acres) and a total storage capacity of 100.37 million cubic metres (3,545 × 10 ^ 6 cu ft).
Water arrives at the powerhouse from the dam via the 12.89 km (8.0 mi) long Upper Kotmale Tunnel, which then feeds the 793 m (2,602 ft) penstock. The initial 745 m (2,444 ft) of the penstock is single-lane, while the latter 48 m (157 ft) splits into two lanes, feeding the two 75 MW generators respectively.
The maiden water release of the dam was in January 2017. [3] Morgahakanda/Kaluganga project is the last of the Great Mahaveli project [ 4 ] The larger combined project involves the construction of the Moragahakanda Dam and Reservoir, along with the separate Kalu Ganga Dam and Reservoir , for irrigation and power generation purposes.
The Bowatenna Dam is a 100 ft (30 m) high gravity dam at Bowatenna, in Central Province of Sri Lanka. The dam was built in June 1981 , and is used primarily for irrigation . A 40 MW power station is also constructed 5,800 ft (1,800 m) downstream, for hydroelectric power generation.
By the late 1960s the tank's bund was 4.5 mi (7 km) long and 10 ft 4 in (3 m) high whilst the tank's storage capacity was 26,600 acre⋅ft (32,810,617 m 3) and its water spread area was 4,550 acres (1,841 ha). [1] There was a 172 ft (52 m) channel flow spill on the right bank and seven sluices. [1]