International Symposium on ICT for Environmental Sustainability (ICTES 2014)
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Item Use of Kissel Server as a Platform for the Expansion of Research on the Water Quality of Asian Water Bodies(Department of Zoology, University of Kelaniya, Kelaniya, Sri Lanka, 2014-06) Dahanayaka, D.D.G.L.; Tonooka, H.; Wijeyaratne, M.J.S.; Minato, A.; Ozawa, S.Monitoring of all relevant aspects of water bodies is highly important for their sustainable use. To achieve this all research findings should be easy accessible and presenting those in a user friendly manner will be highly advantageous. Therefore, development of a database on the coastal water bodies of Sri Lanka on KISSEL server system was initiated, for the benefit of all interest groups including the general public. Presently it contains water quality data of lagoons and estuaries for over two decades. This was extended from a local scale to a regional scale. In this extension, algorithm improvement or tuning based on in-situ data sets was carried out for optimization. The aim was to expand the databases on water bodies using satellite analysis within selected Asian countries. It was initiated through KISSEL server system to benefit pollution monitoring and sustainable use of water bodies. Water bodies of Japan, Sri Lanka, Vietnam, Thailand, Indonesia and Philippines were selected considering their economic and ecological importance. In-situ research parallel to satellite overpass were conducted on the following water bodies. Local Universities and/or Research Institutes collaborated with the collection of field data and will involve in future continuous monitoring programs and KISSEL related activities.Item Eutrophication Trends in Bolgoda North Lake, Sri Lanka(Department of Zoology, University of Kelaniya, Kelaniya, Sri Lanka, 2014-06) Perera, B.D.C.; Wijeyaratne, M.J.S.; Dahanayaka, D.D.G.L.; Tonooka, H.; Minato, A.; Ozawa, S.Chlorophyll-a (Chl-a) concentration in the Bolgoda North Lake (06.400 – 06. 480 N; 079. 550 -079. 580 E), which is a shallow brackish water body situated in the western coastal region of Sri Lanka, was determined through correlating Advanced Space-borne Thermal Emission and Reflection Radiometer (ASTER) optical sensor data with in-situ data measured from April 2013 to October 2013 in 05 sampling sites. ASTER band ratio of B1/B2 which gave the highest correlation with in-situ Chl-a data was used to generate 15 m resolution Chl-a distribution maps. Chl-a distribution maps generated using ASTER data indicated that most areas of Bolgoda North Lake were eutrophic. Some regions of the Weras Ganga which flows into the Lake showed very high Chl-a concentrations during April indicating hypereutrophic conditions while in June, September and October these areas indicated eutrophic conditions. Observations on land use pattern revealed that industrial zones border these areas. High Chl-a concentrations were also observed in the areas bordered by the lands with low income houses from which household waste as well as sewage are discharged directly to the lake. Chl-a distribution maps developed for 2005, 2008, 2010 and 2011 revealed that eutrophication of the Bolgoda North Lake has gradually increased in the recent past. This may possibly be due to the increase in the industrial effluents as a result of industrial development in the area and also due to increased population of low income groups that live in some areas bordering the lake.