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Hydrodynamic modelling and flood mapping of sembrong catchment area

Mazlan, Marina and Mohammad Razi, Mohd Adib and Adnan, Mohd Shalahuddin and Anjang Ahmad, Mustaffa and Tan, Lai Wai (2014) Hydrodynamic modelling and flood mapping of sembrong catchment area. In: 13th International Conference on Urban Drainage (ICUD 2014), 7 - 12 September 2014, Borneo Convention Centre Kuching (BCCK), Sarawak, Malaysian Borneo.

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Abstract

With the increased frequency of natural disasters, there is an elevation of the usage of the integration of flood map and hydrodynamic models to assess the risks and impacts of flood at different temporal and spatial scales. In the past 15 years, there were massive changes in land usage in the study area; from virgin forest to palm oil plantation, industrial and housing areas. These changes had really influenced the infiltration, as well as the runoff rates in this area. The increase of runoff and decrease of infiltration rates could lead to serious flood problem. The main objective of this study was to determine the effectiveness of the existing drainage system of Sembrong river based on two models, namely (i) hydrodynamic model, which was developed using XPSWMM and (ii) flood map, which was developed using SURFER 9. A total of eight nodes and seven links of the Sembrong river were built using XPSWMM, which began from Ayer Hitam to Sri Gading. Based on the results, the peak flow rate for Sembrong river was 135.2180 m3/s. The hydrodynamic model had indicated that Link 1, which was located at Ayer Hitam, Link 3 (Sabak Uni) and Link 5 (Parit Raja) were unable to accommodate the additional amount of surface runoff that went into the drainage system, thus led to flooding. Based on the flood map, the elevation in this area was quite low, which ranged from 3 to 14 m. By integrating the flood map and hydrodynamic map, it clearly shows that the results are more reliable and the affected area can be easily identified. The developed flood model could be a very useful and valuable tool in flood management of the Sembrong river. It may be used as a tool for river development planning, flood mitigation measures, addressing public awareness and flood evacuation planning

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: hydrodynamic model; Sungai Sembrong; XPSWMM; flood risk assessment; flood mapping; SURFER 9
Subjects: Q Science > QC Physics
Divisions: Faculty of Civil and Environmental Engineering > Department of Water and Environmental Engineering
Depositing User: Mrs. Nurhayati Ali
Date Deposited: 18 Mar 2015 06:28
Last Modified: 18 Mar 2015 06:28
URI: http://eprints.uthm.edu.my/id/eprint/6707
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