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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 surface runoff for later use. They make ...
The irrigation works in ancient Sri Lanka were some of the most complex irrigation systems of the ancient world. 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 ...
Tissa Wewa. Yoda Ela (Giant Canal) or Jaya Ganga, an 87 km (54 mi) long single banking water canal carrying excess water to Tissa Wewa reservoir from Kala Wewa reservoir in Anuradhapura. The Yodha Ela is known for achieving a rather low gradient for its time. The gradient is about 10 centimetres per kilometre or 6 inches per mile. [1][2][3]
Major irrigation schemes of Sri Lanka, as evident from the earliest written records in the Mahawansa, date back to the fourth century BCE (Parker, 1881; [1] Brohier, 1934). ). The purpose and determination in the construction of the irrigation systems are depicted by the words of Parakrama Bahu I, 1153–1186 CE: "Let not even a drop of rain water go to the sea without benefiting
Max. depth. 34 ft (10 m) [2] Water volume. 106,500 acre⋅ft (131,365,816 m 3) [1] Surface elevation. 101 ft (31 m) [3] Iranamadu Tank (Tamil: இரணைமடு குளம் Iraṇaimaṭu Kuḷam; Sinhala: ඉරණමඩු වැව) is an irrigation tank in northern Sri Lanka, approximately 3 mi (5 km) south east of Kilinochchi.
Mahaweli Development programme. The Mahaweli Development program (Sinhala: මහවැලි සංවර්ධන වැඩසටහන) is known as the largest multipurpose national development program in the history of Sri Lanka and is also considered the keystone of the government's development program that was initiated in 1961.
An irrigation tank or tank is an artificial reservoir of any size. In countries like Sri Lanka and India they are part of historic methods of harvesting and preserving rainwater, critical in regions without perennial water resources. A tank is often an earthen bund (embankment or levee) constructed across a long slope to collect and store ...
Catchment area. 88 sq mi (228 km 2) [1] Managing agency. Department of Irrigation, Northern Provincial Council. Water volume. 35,300 acre⋅ft (43,541,909 m 3) [1] Vavuni Kulam (Tamil: வவுனி குளம் Vavuṉi Kuḷam) is an irrigation tank in northern Sri Lanka, approximately 2 mi (3 km) south east of Mallavi.