Abstract
Hulu Langat district, which is located in Selangor was severely affected by flood. The study area was focused on the upper Sungai Langat basin area where main cities such as Kajang, Bangi, Seri Kembangan and Dengkil are situated. These cities which are located at the downstream of upper Sungai Langat were frequently inundated during heavy rainfall. This scenario had caused a nuisance to the people surrounding the inundation area. Thus, the objective of this study was to produce a flood hazard map by using HEC-RAS model. DEM data of 1 arc-second resolution was used in the HEC-RAS model. Observed discharge data were obtained from DID. Five selected events with discharge value were simulated in 2D using the HEC-RAS model to produce inundation boundary map. The inundation boundary map was compared between simulated and observed discharge value. The result shows that the map produced for both simulated and observed discharge data were almost similar. 100 years ARI for upper Sungai Langat was designed based on MSMA. Peak discharge of 426 m3/s had inundated 93 km2 area of the upper Sungai Langat with maximum depth of 7.14 m. This study had successfully produced flood hazard map.
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Mohamad Faudzi, S.M., Abustan, I., Sabtu, N., A. Wahab, M.K. (2020). Flood Hazard Map of Upper Sungai Langat Using HEC-RAS. In: Mohamed Nazri, F. (eds) Proceedings of AICCE'19. AICCE 2019. Lecture Notes in Civil Engineering, vol 53. Springer, Cham. https://doi.org/10.1007/978-3-030-32816-0_125
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DOI: https://doi.org/10.1007/978-3-030-32816-0_125
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