FLOOD MAPPING FOR DAM BREAK ASSESSMENT IN CAMERON HIGHLANDS

  • Rahsidi Sabri Muda Tenaga Nasional Berhad Research, Kajang, MALAYSIA
  • Fatin Shahira Abdullah Tenaga Nasional Berhad Research, Kajang, MALAYSIA
  • Mohd Ramzi Mohd Hussain Tenaga Nasional Berhad Research, Kajang, MALAYSIA
  • Izawati Tukiman Tenaga Nasional Berhad Research, Kajang, MALAYSIA
  • Jasasikin Ab. Sani International Islamic University of Malaysia, Gombak, MALAYSIA

Abstract

Abstract: A dam can be defined as all man-made barriers built for storage or control of water or other fluids, together with appurtenant works. There are nearly 104 large dams reported in Malaysia with more than 15m high and storage capacity at least 3 million m3. On the other hand, due to the water they trap, dam often presents major risks to the downstream areas. Despite the enhanced protection of dams from advanced technical expertise and improved design efficiency, a maximum non-risk guarantee is not achievable, and incidents may occur due to water that usually flows over a spillway and high-speed discharge or unexpected peak discharge. The obvious impact of dam failure is the population at risk near the downstream area. The study area, Pos Telanok is located downstream of Susu Dam of the Ulu Jelai Hydroelectric Project (HEP) in Cameron Highland, Malaysia. Therefore, this study's principal purposes were to evaluate potential flood severity due to dam break and identify the population at risk (PAR) using the grid-based method. ArcGIS software and data from 2D flood modelling were used as an efficient process to analyse the effect due to flood dam failure. This framework was used to create the flood severity grid for mapping analysis. Based on the simulation model and flood map results, the town of Pos Telanok will be severely impacted during an event of dam-break as exemplified by the approximate 79% of the population at risk (PAR). Based on the study, the huge volume of impounding water together with the immense potential energy contained in it would pound downstream areas, threatening populations and the environment along its path, in the event of dam failure. The finding in this study will help local authorities and emergency responders to develop warning and evacuation plans to rescue people if the disaster occurs.

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Published
2021-03-01
How to Cite
MUDA, Rahsidi Sabri et al. FLOOD MAPPING FOR DAM BREAK ASSESSMENT IN CAMERON HIGHLANDS. International Journal of Engineering Advanced Research, [S.l.], v. 3, n. 1, p. 46-63, mar. 2021. ISSN 2710-7167. Available at: <https://myjms.mohe.gov.my/index.php/ijear/article/view/12595>. Date accessed: 16 june 2024.
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Articles