1. 1) Mander, U., Kull, A., Tamm, V., Kuusemets, V. and Karjus, R.: Impact of climatic Fluctuations and land use change on runoff and nutrient losses in rural landscape. Landscape Urban Plan, Vol.41, pp.229-238, 1988.
2. 2) U.N. Environment Programme (UNEP): State of the Environment Sri Lanka. United Nations Environment Programme, Regional Resource Centre for Asia and the Pacific (UNEP-RRC.AP), 2001.
3. 3) Wickramarachchi, T.N., Ishidaira, H. and Wijyaratna,T.M.N.: Variation of constituent loads and concentrations with the flow in Gin river, Sri Lanka. J Natn Sci Foundation Sri Lanka, Vol.41(3), pp.237-247, 2013.
4. 4) Sri Lanka Standards Institute (SLS): Sri Lanka Standards for Potable Water SLS 614. Sri Lanka Standards Institute, Colombo 08, 1983.
5. 5) Central Environmental Authority (CEA): Proposed Ambient Water Quality Standards for Inland Waters of Sri Lanka. Central Environmental Authority, Battaramula, 2001.