The Deduru Oya is the sixth largest river in Sri Lanka which is about 142 km in length and has a water resource area of about 2,420 km.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/massive-multi-functional-project-deduru-oya
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/daily-news-sri-lanka
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/sri-lanka
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/south-asia
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-resources
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/rivers
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/irrigation
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/dams
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/rehabilitation
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/canal-irrigation
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/hydroelectricity
[12] http://admin.indiaenvironmentportal.org.in/category/thesaurus/drinking-water
[13] http://admin.indiaenvironmentportal.org.in/category/thesaurus/reservoirs