River Kalu in Ratnapura
2,400 m (7,874 ft)
|Basin size||2,766 km2 (1,068 sq mi)|
|Length||129.5 km (80 mi)|
Kalu Ganga (Sinhalese: කළු ගඟ; literally: The Black River) is a river in Sri Lanka. Measuring 129 km (80 mi) in length, the river originates from Paadhaya and reach the sea at Kalutara. The Black River flows through the Ratnapura and the Kalutara District and pass the city Ratnapura. The mountainous forests in the Central Province and the Sinharaja Forest Reserve are the main sources of water for the river.
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-  Development of a Flood Forecasting Model For Kalu River and Kelani River Basins in Sri Lanka using Radial Basis Function Neural Networks
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