This video is about the Madu River. The Madu Ganga (River) is a minor watercourse which originates near Uragasmanhandiya in the Galle District of Sri Lanka, before widening into the Madu Ganga Lake at Balapitiya. The river then flows for a further a 4.4 km before draining into the Indian Ocean.
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https://www.youtube.com/watch?v=QGRBURBoFbc