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

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)

Tributaries

• Kospothu Oya
• Dik Oya
• Ratwila Ela
• Kimbulwana Oya
• Hakwatuna Oya
• Maguru Oya
• Kolamunu 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.[1]

References