Coastal Zone Management in Sri Lanka, The need for integrated approaches to data generation, information sharing and definition of critical areas Ajith Gunaratne
Coastal Zone definition - Sri Lanka Total land area Km 2 Length of coast line Km Basin estuaries & lagoons - 45 Riverine estuaries Divisional Secretaries’ Divisions Coastal Regions (DSD) encompasses 23 % of the total extent 25 % of the country's population 62 % of industrial units 41 % of urbanized place 70 % of tourist hotel 68 % of Coastal fishery production Coastal uses includes Urban expansion Commercial and fisheries harbor development Transport and communication Recreational and tourism development Sand and Coral mining Aquaculture (esp. Shrimp farming) Settlement from internal migratory people Fishing
Study Area : Negombo Lagoon - Muthurajawela MasrhCoastal Wetland Lagoon and wetland system ha Catchments Km 2 Requirement 1 : Proper definition to Coastal Zone
Vegetation - grasses - reeds - sedges - aquatic vegetation - shrubs & trees - submerged seagrasses - mangroves - Tidally influenced coastal wetland - Marine fishing center of national importance Fauna - 40% of Sri Lankan mammal species - 39 % of Sri Lankan bird species - 40 % of migrants birds - 23% of reptile species - 39 % Sri Lankan amphibians Negombo Lagoon - Muthurajawela Masrh Coastal Wetland
Major Problems Marsh Encroachments Habitat degradation Pollution Lagoon Sedimentation Maintenance of adequate tidal exchange Habitat degradation Untreated industrial pollutants Oil pollution Catchments Industrialisation Urbanisation Salt water Intrusion Infrastructure Development
Coastal Zone Definition Identification of Data Requirements Statistical Remote Sensing Bio -Physical GISCriteria Data Demarcations Planning
Understanding (Process) Past P r e s e n t Future Inventory - Query - extraction - change Observed Information Derived Information Management and Planning - Planning - decision - description (past, present) - explanation : modeling - Forecast (Future) : Simulation, decision making (R. Caloz et al. 1997)