Polwatta Ganga

Polwatta Ganga is a river in southern Sri Lanka. It originates in the hills above Nakiyadeniya where it is known as Udugan Oya (Amarathunga et al., 2013; Arumugam, 1969). It flows a length of nearly 32.19 km before entering the Indian Ocean at Weligama Bay at a point called Polwatumodera (Amarathunga et al., 2013). 

The Polwatta river has a catchment area of about 235.7 km2 (Amarathunga et al., 2013). During the dry season, the River is subjected to saline water intrusion at least 8 km upstream (Amarathunga et al., 2013). An important development work of the Polwatta Ganga is its inundation regulator which was constructed in 1954 (Arumugam, 1969).

1) Amarathunga, A., Jinadasa, S. and Azmy, S., 2013. Sedimentary characteristics and status of water quality in Polwatta river and Weligama bay in Sri Lanka. Journal of Environmental Professionals Sri Lanka, 2(1). pp.38-51.
2) Arumugam, S., 1969. Water resources of Ceylon: its utilisation and development. Water Resources Board. p.78.

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This page was last updated on 7 May 2022
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