Dam Break Flood Mapping and Analysis Using Open Source GIS Tool and Data

Abstract The impact of climate change may influence on extreme weather conditions and lead to high intensity precipitation, which will huge structures such as dam. Although risk mitigation protection dams from advanced technical expertise have been reviewed regularly, a maximum non-risk guarantee is not achievable, incidents occur due water that usually flows over spillway high-speed discharge or unexpected peak discharge. Hence, the immediate dam failure population at near downstream area. This study evaluates break scenario under probable precipitation (PMF) condition Puah hydropower aims this are determine potential area assess flooding public facilities event. Integration an open source GIS tool, Google Satellite Image, Open Street Map, flood hazard map derived hydrodynamic model has used efficiently analyse by using spatial analysis method, generate possible evacuation route network. Analysis estimated 187,796 people risk, 3,177 km road, 2-unit hospital 76 amenities (mosque school) be impacted. portrays possibility data tool alternative for emergency preparedness application. method in could adopted other interest disaster event, helping local authorities early warning systems focusing rescue work if occurs.