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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.
The first tank which can be identified with certainty was built by King Pandukabhaya, who reigned from 437 to 367 BC. It is said that he had three tanks built, namely Abhaya Wewa, Gamini Wewa, and Jaya Wewa. Of these, only one, Abhaya Wewa, can be identified with an extant tank, Basawakkulama Wewa.
The tank's design, including the use of a solid rock outcrop as the spillway, indicates sophisticated engineering from the Anuradhapura era. [ 4 ] Primary sources like "Padaviya Reservoir Project" by H De S Manamperi and historical records note Padaviya's significance as a large town of commercial and religious importance by the 11th century.
A tank cascade is a system of irrigation tanks in single or multiple chains where water from a higher tank flows into lower tanks. Examples of tank cascades include Sri Lanka's tank cascade system , [ 6 ] the Indian city of Bangalore's cascading lakes in the Varthur lake series, [ 7 ] and the Indian city of Madurai 's Vandiyur tank cascade system.
The tank was built by Kulakkottan (604-614 AD) and further developed by King Parakramabahu the Great. [2] It was also known as Gangathala Vapi at the time. The reservoir has a catchment area of 216 km 2 (83 sq mi) and a capacity of 135 million cubic metres (4.8 × 10 9 cu ft).
The Sri Lankan chronicle, the Culavamsa which was written in the Buddhist canonical language Pali, enumerates his works both as a provincial ruler in western Sri Lanka and later as the monarch of the whole country: he either built or restored 163 major tanks (reservoirs), 2,617 minor tanks, 3,910 irrigation channels, 328 stone sluices and 168 ...
An image shared on X claims to show an Israeli Merkava tank modified into a fruit stand in Gaza. Verdict: False The tank is a Syrian T-55, not an Israeli Merkava tank. It was taken in Syria. Fact ...
Nachchaduwa wewa (Also known as Mahadaragala Reservoir) [1] is a reservoir near Thammannakulama, Sri Lanka. The reservoir is used to store water brings from Kala Wewa through Yoda Ela channel. [ 2 ] [ 3 ] The reservoir was severely damaged in 1957 flood and the restoration of the tank was completed in 1958.
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