Evaluation of Flooding in Sg Gita Catchment, Kuching

  • D.Y.S. Mah aHydro-Environmental Engineering Research & Development (HERD) Cluster, Department of Civil Engineering, Faculty of Engineering, Universiti Malaysia Sarawak, 94300 Kota Samarahan, Sarawak
  • C.P. Hii Jurutera Adda Consulting Engineers, Bangunan USC, No 683, Lorong Song 1A, Off Jalan Song, 93350 Kuching, Sarawak
  • C.Y. Ong Jurutera Adda Consulting Engineers, Bangunan USC, No 683, Lorong Song 1A, Off Jalan Song, 93350 Kuching, Sarawak
  • Y. Pui Jurutera Adda Consulting Engineers, Bangunan USC, No 683, Lorong Song 1A, Off Jalan Song, 93350 Kuching, Sarawak
DOI: https://doi.org/10.33736/jaspe.372.2017
Keywords: backwater, InfoWorks RS, river water level, stormwater, urban drainage

Abstract

This paper outlines a methodology of flow routing with inclusion of downstream river water level applied to a Sg Gita urbanized catchment beside Sg Sarawak in Kuching city, Sarawak, Malaysia. Evaluations are done by demonstrating the modelling of flooding scenarios using InfoWorks River Simulation (RS) that stresses on different aspects specific to Sg Gita’s conditions, namely (1) impacts of high and low river water levels, (2) solely urban flooding and (3) the combination of the two. The outcomes indicate that the dynamics of downstream river water level influences the performance of the urban drainage that flowed into the river. Backwater is overriding the flows of urban drains. Therefore, the mentioned methodology is found superior than conventional methodology with only flow routing to represent the flow mechanism of urban catchment bounded by a downstream river.

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Published
2017-04-28
How to Cite
Mah, D., Hii, C., Ong, C., & Pui, Y. (2017). Evaluation of Flooding in Sg Gita Catchment, Kuching. Journal of Applied Science & Process Engineering, 4(1), 127-141. https://doi.org/10.33736/jaspe.372.2017
Issue
Vol 4 No 1 (2017): Journal of Applied Science & Process Engineering, Volume 4, Number 1, 2017
Section
Articles

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