| Abstrakt: |
Flooding is a recurring phenomenon which can reduce certain extent by storing the water in large dam. However, dam operation is the most challenging part of flood resilience in recent climatic uncertainty and extremes. Furthermore, old dams have the potential to fail due to extreme rainfall, earthquakes, and structural failure. Recently, dam break analysis for prior threat detection has been used to strengthen resilience and improve decision-making by guiding emergency action plans (EAP) preparation. This paper describes the analysis of overtopping and piping failure of the earthen part of the Damanganga Reservoir, Gujarat, India using geospatial techniques and 2D hydrodynamic inundation modelling. The Froehlich's guideline is utilised for dam breach analysis. Water surface elevation, water depth, water velocity, arrival time, and water inundation map were developed using 2D HEC-RAS based hydrodynamic modelling. The generated maps will utilise for flood decision making activity to reinforce the EAP for large dam. |
