4. Sea Level Trend Shoreline Change Rate Long Term Sea Level Data from tide gauges Satellite and Secondary data DEM data Return periods (T) Extreme water level (H max ) Future Sea Level after T (A) Future Shoreline after T (B) Contours Multi-hazard Line=A>B>C Contour of H max (C) Methodology for multi-hazard coastal vulnerability Multi-hazard Map
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6. Mean-sea-level-rise trends along the north Indian Ocean coasts from past tide-gauge records Estimated trends vary from 1.06 to 1.75 mm/year for individual records (an average of 1.30 mm/year) Unnikrishnan and Shankar (2007) Net sea-level-rise trends 5.74 -0.52 5.22 55 Diamond Harbour 1.09 -0.39 0.70 53 Vishakhaptnam 1.75 -0.44 1.31 54 Kochi 1.20 -0.43 0.77 113 Mumbai 1.06 -0.45 0.61 44 Karachi 1.37 -0.16 1.21 58 Aden Net sea level rise (mm/yr) GIA (mm/yr) Trends (mm/yr) No of years Station