{{Short description|River in Sri Lanka}} {{Infobox river | name = Deduru Oya | name_native = | name_native_lang = | name_other = | name_etymology = | image = DeduruOya-January2012-01.JPG | image_size = | image_caption = Aerial view of the mouth of Deduru River, Chilaw. | image_alt = | map = | map_size = | map_caption = | map_alt = | pushpin_map = Sri Lanka | pushpin_map_size = | pushpin_map_caption= | pushpin_map_alt = | subdivision_type1 = | subdivision_name1 = | subdivision_type2 = | subdivision_name2 = | subdivision_type3 = | subdivision_name3 = | subdivision_type4 = | subdivision_name4 = | subdivision_type5 = | subdivision_name5 = | length = {{Convert|142|km|mi|abbr=on}} | width_min = | width_avg = | width_max = | depth_min = | depth_avg = | depth_max = | discharge1_location= | discharge1_min = | discharge1_avg = | discharge1_max = | source1 = | source1_location = Kurunegala District | source1_coordinates= | source1_elevation = | mouth = | mouth_location = MAHO | mouth_coordinates = {{Coord|07|36|50|N|79|48|12|E|display=inline,title|region:LK_type:river}} | mouth_elevation = Sea level | progression = | river_system = | basin_size = {{convert|2620|km2|abbr=on}} | basin_landmarks = | basin_population = | tributaries_left = | tributaries_right = | waterbodies = | waterfalls = | bridges = | ports = | custom_label = | custom_data = | extra = }}
The '''Deduru Oya''' (Tamil: மாயவன் ஆறு) is the sixth-longest river of Sri Lanka. The {{Convert|142|km|mi|0|abbr=on}} 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.<ref>{{cite web | url=http://www.fao.org/docrep/003/T0028E/T0028E02.htm | title=Sri Lanka: Rivers | publisher=FAO | access-date=16 June 2019}}</ref>
== References == {{Reflist}}
{{Inland waters of Sri Lanka|state=collapsed}} {{SriLanka-river-stub}} Category:Bodies of water of Kurunegala District Category:Bodies of water of Puttalam District Category:Rivers of Sri Lanka