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Rain clouds over a tank in Sri Lanka The tank cascade system ( Sinhala : එල්ලංගාව , romanized: ellaṅgāva ) is an ancient irrigation system spanning the island of Sri Lanka . It is a network of thousands of small irrigation tanks ( Sinhala : වැව , romanized: wewa ) draining to large reservoirs that store rainwater and ...
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 ...
The main purposes of carrying out the program were the generation of hydroelectric power, controlling flood, making irrigation facilities for dry zone cultivation, settlement of landless and unemployed families by constructing and developing the physical and social infrastructure required for human habitation by using the waters of the Mahaweli River.
The earliest examples of irrigation works in Sri Lanka date from about 430 BCE, during the reign of King Pandukabhaya, and were under continuous development for the next thousand years. In addition to constructing underground canals , the Sinhalese were the first to build completely artificial reservoirs to store water , referred to as tanks ...
Victoria Dam (Sinhala: වික්ටෝරියා වේල්ල Viktoriya Vella) is an arch dam located 130 mi (209 km) upstream of the Mahaweli River's mouth and 4 mi (6 km) from Teldeniya in Sri Lanka. It is named in honour of Queen Victoria of the United Kingdom. Its main purposes are irrigation and hydroelectric power production.
Just like the Puhulpola Dam, the Dyraaba Dam consists of three chute spillways, allowing a combined discharge of up to 2,161 m 3 /s (76,300 cu ft/s). [ citation needed ] The dam creates the Dyraaba Reservoir (DR) which has a gross storage of 970,135 m 3 (34,260,000 cu ft) and active storage of 600,000 m 3 (21,000,000 cu ft).
The Kalu Ganga is a tributary of the Amban Ganga which in turn is a tributary of the Mahaweli River, the longest river in Sri Lanka. Construction of the project was launched by President Mahinda Rajapaksa on 25 January 2007. [1] The maiden waters of the dam was released in July 2018. [2]
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 for irrigation purposes approximately a billion cubic metres of water, which would otherwise flow out to sea. Site studies of the dam began in 2006 and construction started in 2008.