Deduru Oya

Deduru Oya
Aerial view of the mouth of Deduru River, Chilaw.
Physical characteristics
Source
• location	Kurunegala District
Mouth
• location	Chilaw
• coordinates	07°36′50″N 79°48′12″E
• elevation	Sea level
Length	142 km (88 mi)
Basin size	2,620 km2 (1,010 sq mi)

The Deduru Oya is the sixth-longest river of Sri Lanka. The 142 km (88 mi) long river runs across four provinces and five districts.

Tributaries

• Kospothu Oya
• Dik Oya
• Ratwila Ela
• Kimbulwana Oya
• Hakwatuna Oya
• Maguru Oya
• Kolamunu Oya
• Delvita Oya

Its catchment area receives approximately 4,313 million cubic metres of rain per year, and approximately 27 percent of the water reaches the sea. It has a catchment area of 2,620 square kilometres.