High Resolution 1:10,000 scale Mapping Strategy of Multi ... - NDMA

7. The DEM/DSM/DTM model to be created for river embankment areas (5
kilometers strip on either side) and coast line (10 kilometer strip along the
coast) in 1: 2,000 scale which contour intervals better than 0.5 meter
8. The flood inundation map to be created forms the above data using standard
programs available.
9. Flood data record to be collected for different river basins and flood returns
period analysis and flood intensity analysis to be done.
10. The river cross-section and river hydraulic maps to be worked out.
11. The flood inundation map for different river gauge levels, flood return period
and flood intensity analysis to be converted into flood hazards maps.
12. The flood hazards maps are to be calibrated with actual flood records to
arrive at flood hazard zonation map.
13. The early warning system schematic is shown in Figure B.2.12. It requires
real time measurement of precipitation in catchment area and river gauging
and dam discharge data.
14. Combined with the information provided in above paragraphs, river hydraulics
and DEM/DTM/DSM maps, the flood inundation maps can be created.
15. The inundation map combined with assets maps will generate risk maps
which are useful tool for mitigation.
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