Abstract

Dams play a vital role in our modern life but it may fail in any undesirable situation and have a disastrous effect on society, economy and environment. As most of the dams in Malaysia undergo aging factors, the integrity of dams should be examined. This research assesses the flood impact analysis on direct damages and loss of life (LOL) for the Pergau Hydroelectric Dam breach under the probable maximum flood (PMF) scenario using Hydrologic Engineering Center’s Flood Impact Analysis (HEC-FIA) software. The results are also compared with the United States Bureau of Reclamation method. The model was populated with inundation and flood arrival time grid, LOL parameters and structure inventories as input and the simulation results showed that 17 affected villages would subject to direct damage of RM 79,433,437 and 380 LOL. The percentage difference between the two methods is 2.75% for direct damage and 4.12% for LOL.

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