PMF-driven dam break modelling and flood hazard mapping for the Sungai Perak cascade

A hydraulic and dam break analysis was carried out for a PMF failure of the Temengor dam, including chain reaction failures of the Bersia, Kenering and Chenderoh dams. The MIKE 11 1-D model was used to derive breach outflow hydrographs, and MIKE 21 2-D was used for flood plain modelling and the generation of downstream inundations maps. The MIKE Flood model was used to calculate the flooded area downstream, the flood travel time and the maximum flood depth. Based on the results, villages which would be affected downstream of the dam could be identified. This study will be useful as a reference for agencies such as Jabatan Pertahanan Awam (JPAM) and Jabatan Bomba dan Penyelamat Malaysia, so that precautions can be planned for in case of a flood disaster.