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Summary

This is a case study on floodplain analysis and risk assessment. Flooding is a costly and common natural disaster. Flood risk mapping, using hydraulic models and GIS, helps delineate flood-prone areas. A study on the Lakhandei River in Nepal integrated these techniques, focusing on creating water surface profiles and risk mapping. The study divided risk into vulnerability (land use) and hazard (hydrology and hydraulics) and created maps to identify risk areas and prioritize mitigation. It also developed a flood action plan and assessed river course changes with satellite images.