Pusweli Oya

Pusweli Oya is a major tributary of Kelani Ganga river in Sri Lanka.

Starting from the hills in Puswelihena in Horana Division of Kalutara District, it flows northwards through a low lying flat land (6–10 meters above sea level) converted into rice fields, which ultimately becomes the stream's flood plain during rainy seasons. On its way, the stream is joined by the Ma Dola starting from the hills of Madoluwawa and Kurugala, the Angomuwa Oya starting from Angomuwa and Miriyagal Kanda and the Arukwathu Oya starting from Udagama Kanda (1492 feet above sea level). The stream flows for 16 km down its valley before joining the Kelani Ganga near Hanwella. The lowest part of its valley is mostly covered by a large marshland known as Barawa marshland, where there are river loops and islets on its course. The flood plain of the stream is flooded many times annually mainly during the monsoon season from May to September and the inter-monsoon season of October and November.

References

Inland waters of Sri Lanka

Dams and reservoirs

With hydroelectric capabilities	Bowatenna Broadlands Canyon Dam Castlereigh Deduru Oya Gal Oya Kotmale Kukule Ganga Laxapana Maskeliya Moragahakanda Nilambe Norton Polgolla Randenigala Rantembe Samanala Udawalawe Upper Kotmale Victoria

For irrigation only	Giant's Tank Inginimitiya Iranamadu Kalu Ganga Kandalama Kantale Lunugamwehera Maduru Oya Muthuiyankaddu Kulam Rajanganaya Rambakan Oya Ratkinda Ulhitiya Vavuni Kulam

Ancient tanks	Beira Lake Diyawanna Kala Wewa Kandy Lake Minneriya Sembuwatta Lake Tissa Wewa (Anuradhapura) Tissa Wewa (Tissamaharama)

Lagoons

East coast	Batticaloa Lagoon Chalai Lagoon Chundikkulam Lagoon Kokkilai Lagoon Kokkilai Lagoon Nai Aru Lagoon Nanthi Lagoon Ullackalie Lagoon Upaar Lagoon Vadamarachchi Lagoon Valaichchenai Lagoon

West coast	Jaffna Lagoon Mundal Lagoon Negombo Lagoon Puttalam Lagoon Uppu Aru Lagoon

Rivers

≥100km	Deduru Oya Gal Oya Gin Ganga Kala Oya Kalu Ganga (Kukule Ganga) Kelani River (Kehelgamu Oya Maskeliya Oya Pusweli Oya) Kirindi Oya Kumbukkan Oya Maduru Oya Maha Oya Mahaweli River (Amban Ganga Kotmale Oya Nanu Oya) Malvathu River Menik Ganga Mi Oya Walawe River (Belihul Oya) Yan Oya

<100km	Akkarayan Aru Kanakarayan Aru Kodalikkallu Aru Madu Ganga Mandekal Aru Mavil Aru Nay Aru (Mannar) Nay Aru (Mullaitivu) Netheli Aru Pali Aru Pallavarayankaddu Aru Parangi Aru Per Aru Piramenthal Aru Theravil Aru Valukkai Aru Verugal Aru

Related organizations

Mahaweli Authority
Ministry of Irrigation and Water Resources Management

Coordinates: 6°54′N 80°04′E / 6.900°N 80.067°E / 6.900; 80.067

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