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Ajith Gunaratne

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 - 65000 Km 2 Length of coast line -1620 Km Basin estuaries & lagoons - 45

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Ajith Gunaratne

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  1. Coastal Zone Management in Sri Lanka, The need for integrated approaches to data generation, information sharing and definition of critical areas Ajith Gunaratne

  2. Coastal Zone definition - Sri Lanka Total land area - 65000 Km2 Length of coast line -1620 Km Basin estuaries & lagoons - 45 Riverine estuaries - 75 74 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

  3. Requirement 1 : Proper definition to Coastal Zone Study Area : Negombo Lagoon - Muthurajawela MasrhCoastal Wetland Catchments - 727 Km2 Lagoon and wetland system - 6232 ha

  4. Negombo Lagoon - Muthurajawela Masrh Coastal Wetland - 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 Vegetation - grasses - reeds - sedges - aquatic vegetation - shrubs & trees - submerged seagrasses - mangroves

  5. Major Problems Lagoon Sedimentation Maintenance of adequate tidal exchange Habitat degradation Untreated industrial pollutants Oil pollution Marsh Encroachments Habitat degradation Pollution Catchments Industrialisation Urbanisation Salt water Intrusion Infrastructure Development

  6. Coastal Zone Definition Identification of Data Requirements Statistical Remote Sensing Data Bio -Physical GIS Criteria Demarcations Planning

  7. Inventory - Query - extraction - change Management and Planning - Planning - decision Understanding (Process) P r e s e n t Future Past Observed Information Derived Information - description (past, present) - explanation : modeling - Forecast (Future) : Simulation, decision making (R. Caloz et al. 1997)

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