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Flood hazard assessment using design rainfall under climate change scenarios in the Kelantan River Basin, Malaysia

Tze Huey Tam (Faculty of Built Environment and Surveying, TropicalMap Research Group, Universiti Teknologi Malaysia, Skudai, Malaysia)
Muhammad Zulkarnain Abdul Rahman (Faculty of Built Environment and Surveying, TropicalMap Research Group, Universiti Teknologi Malaysia, Skudai, Malaysia)
Sobri Harun (Department of Hydraulic and Hydrology, Faculty of Civil Engineering, Universiti Teknologi Malaysia, Skudai, Malaysia)
Shamsuddin Shahid (Department of Hydraulic and Hydrology, Universiti Teknologi Malaysia, Skudai, Malaysia)
Sophal Try (Disaster Prevention Research Institute, Kyoto University, Kyoto, Japan and Faculty of Hydrology and Water Resources Engineering, Institute of Technology of Cambodia, Phnom Penh, Cambodia)
Mohamad Hidayat Jamal (Department of Hydraulic and Hydrology, Faculty of Civil Engineering, Universiti Teknologi Malaysia, Skudai, Malaysia)
Zamri Ismail (Department of Geoinformation, Faculty of Built Environmental and Surveying, Universiti Teknologi Malaysia, Skudai, Malaysia)
Khamarrul Azahari Razak (Disaster Preparedness and Prevention Centre, Universiti Teknologi Malaysia Malaysia-Japan International Institute of Technology, Kuala Lumpur, Malaysia)
Mohd Khairolden Ghani (Construction Research Institute of Malaysia, Construction Industry Development Board, Kuala Lumpur, Malaysia)
Yusrin Faiz Abdul Wahab (Construction Research Institute of Malaysia, Construction Industry Development Board, Kuala Lumpur, Malaysia)

International Journal of Disaster Resilience in the Built Environment

ISSN: 1759-5908

Article publication date: 28 February 2023

147

Abstract

Purpose

The present study aims to evaluate the effect of climate change on the flood hazard potential in the Kelantan River Basin using current and future scenarios.

Design/methodology/approach

The intensity-duration-frequency (IDF) was used to estimate the current 50- and 100-year return period 24-h design rainfall, and the climate change factor (CCF) was used to compute the future design rainfall. The CCF was calculated from the rainfall projections of two global climate models, CGCM1 and CCSM3, with different pre-processing steps applied to each. The IDF data were used in the rainfall-runoff-inundation model to simulate current and future flood inundation scenarios.

Findings

The estimated CCF values demonstrate a contrast, whereby each station had a CCF value greater than one for CGCM1, while some stations had a CCF value of less than one for CCSM3. Therefore, CGCM1 projected an aggravation and CCSM3 a reduction of flood hazard for future scenarios. The study reveals that topography plays an essential role in calculating the CCF.

Originality/value

To the best of the author’s knowledge, this is the first study to examine flood projections in the Kelantan River Basin. It is, therefore, hoped that these results could benefit local managers and authorities by enabling them to make informed decisions regarding flood risk mitigation in a climate change scenario.

Keywords

Acknowledgements

The authors like to express their gratitude to the National Hydraulic Research Institute of Malaysia (NAHRIM) for providing the meteo-hydrological data for this study. Takahiro Sayama deserves special thanks for developing the RRI model as a public domain paradigm. Finally, the authors wish to express appreciation to the financial support from Universiti Teknologi Malaysia (UTM) for the funding under UTM Encouragement Grant (UTMER) (Q.J130000.3852.19J74) and University of Salford for funding an International Grant (R.K130000.7343.4B781).

Citation

Tam, T.H., Abdul Rahman, M.Z., Harun, S., Shahid, S., Try, S., Jamal, M.H., Ismail, Z., Razak, K.A., Ghani, M.K. and Abdul Wahab, Y.F. (2023), "Flood hazard assessment using design rainfall under climate change scenarios in the Kelantan River Basin, Malaysia", International Journal of Disaster Resilience in the Built Environment, Vol. ahead-of-print No. ahead-of-print. https://doi.org/10.1108/IJDRBE-05-2022-0048

Publisher

:

Emerald Publishing Limited

Copyright © 2023, Emerald Publishing Limited

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