Mapping the Vulnerability of Coastal Public

1. Mapping the Vulnerability of Coastal Public Naleen Pussella Faculty of Geomatics - Sabaragamuwa University of Sri Lanka Post Graduate Institute of Science – University of Peradeniya

2. Outline • Introduction • Problem Formulation • Problem overview by the Government • Objectives • Site Selection • Methodology • Results and Conclusion • Future Study

3. Introduction • Millions of people are faced to Natural Disasters such as Earthquakes, Land Slides, Flooding, Cyclones • Impact is getting more day by day due to several reasons such as, Public unawareness Environmental pollution Urbanization Improper use of natural resources

4. Introduction • In the process of disaster management and mitigation, it is necessary to look the Environment • Identification of Vulnerability of the public in hazardous areas is a must • Natural Disasters in Sri Lanka Landslides, River flooding, Coastal erosion Droughts

5. Problem Formulation • Coastal line of Sri Lanka – 1660 km • The Coast is the home to one third of population • Majority of the people derive their livelihood from the economic activities in this zone • It accounts for nearly 80 percent of fish production and 70 percent of industrial output of Sri Lanka • The coastal region includes terrestrial ecosystems, mangroves, lagoons and estuaries, shoreline ecosystem, coral reefs, etc

6. Problem Formulation • Coastal erosion has been a severe problem over the years especially in the south, west and north-western coast in Sri Lanka • The average net mean rate of erosion for the entire country is varies from 0.2 to 0.35 m per year • At certain locations, the net erosion has been recorded up to 1 m per year

7. Problem overview by the Government • 1978 - Coast Conservation Dept. • 1981 - Coast Conservation Act • Coastal Zone Management Plan, Coast Conservation Advisory Council to review the problems • Permits system within the 300m coastal zone for Development activities • No Build Coastal Buffer Zone 200m - North and East 100m - Elsewhere from the high water mark - 2005

8. Objective • Identifying and Mapping the vulnerability of the coastal public within 100m buffer zone for natural hazards such as Tsunami, Coastal erosion etc..

9. Site – Hambantota coastal area

10. Site – Hambantota coastal area • Reasons: 1. Ranks as the third poorest district & poorest coastal district (32% are poor) 2. Population density is high in the region 3. More damages by the Tsunami waves 4. Less Strength of Natural Barriers such as Coral reefs, Mangroves, Coastal eco systems Etc. 5. Economically strength (Fishing, Agriculture, Trade and Tourism)

14. Methodology • Mapping the features such as Coastal Topography, Presence of Natural and Man made Barriers, Presence of Infra structure facilities, Land use, Economical strengths of the zones, 100m Buffer zone map • Overlaying the above maps and assigning the weights depending on the Coastal Topography, Economical value of the area, Presence of barriers and the damages by the Tsunami waves using ILWIS 2.1 • Identification the high risk areas for future disasters

15. Assigning Weights

16. Assigning Weights

17. Assigning Weights

18. Assigning Weights

20. Contour Map Contour Map

21. Mapping the Economy Economical Strength

22. Land Use Map Land Use

23. Results and Conclusion • Identified the High, Medium and Low risk areas • The degree of vulnerability of the coastal public is very high due to low altitude, high population density, high coastal degradation and the impact of tsunami for their livelihood • Government and non governmental organizations should have a proper plan to uplift the living conditions of the coastal public

25. Future Study – 3 Sites will be selected

26. Future Study – 3 Sites will be selected

27. Future Study – 3 Sites will be selected

28. Final Expected output • A Coastal GIS • Identifying the Vulnerability of the Coastal Publicfor Future Disasters • Coastal Zones for Conservations, Residential & Commercial areas, Etc….

29. Discussion

30. Thank you