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This study mainly based on three canals of Dehiwala, Wellawatta and Kirulapone and main objectives are to identify the variations of water quality and to identify the human health impact of water quality. Based on these objectives the study was segmented to locate the areas of waste dumping to the canals; to identify the variation of water quality in monthly basis; to identify the temporal variation of water quality; to examine whether there is a relationship between changes of land use and variation of water quality and to examine whether there is a relationship between rainfall and variations of water quality along with identifying the vulnerability on human health. Data collection again segmented as follows. First the observation research to identify the waste dumping sites, locations and also to study the physical conditions of the canal. Then a water quality survey was conducted to measure the water quality parameters, with special focus to e-coli test. Tertiary the questionnaire survey was conducted based on people who live adjacent to the canal to identify their health conditions. To study the land use changes a satellite map interpretation was used.
About the author
Asitha de Silva, BA: Studied Geography at University of Colombo, Sri Lanka. Assistant Lecturer, Department of Geography, University of Colombo, Sri Lanka
