|Catchment area||623 km2 (241 sq mi)|
|Water volume||55,700,000 cu ft (1,580,000 m3)|
Nachchaduwa wewa (Also known as Mahadaragala Reservoir) is a reservoir near Thammannakulama, Sri Lanka. The reservoir is used to store water brings from Kala Wewa through Yoda Ela channel. The reservoir was severely damaged in 1957 flood and the restoration of the tank was completed in 1958.
It is said that this tank is to be one of the sixteen large reservoirs built by King Mahasen (277 – 304). However the chronicle Mahavamsa have made a reference to this reservoir during the time of King Moggallana II (540 - 560).
- "Constructions of King Mahasen/Mahadaragala Reservoir: (Nachchaduwa Reservoir)". mahavamsa.org. Retrieved 16 May 2016.
- "Overview". Nachchaduwa divisional secretariat. Retrieved 16 May 2016.
- "Nachchaduwa wewa". Sunday Observer. 29 May 2011. Archived from the original on 4 March 2016. Retrieved 16 May 2016.
- "Nachchaduwa Tank – නාච්චාදූව වැව". amazinglanka.com. Retrieved 16 May 2016.
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