High-Resolution Hydrological-Hydraulic Modeling of Urban Floods Using InfoWorks ICM

Lariyah Mohd Sidek, Aminah Shakirah Jaafar, Wan Hazdy Azad Wan Abdul Majid, Hidayah Basri, Mohammad Marufuzzaman, Muzad Mohd Fared and Wei Chek Moon
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Lariyah Mohd Sidek: Institute of Energy Infrastructure, Universiti Tenaga Nasional, Kajang 43000, Selangor, Malaysia
Aminah Shakirah Jaafar: Institute of Energy Infrastructure, Universiti Tenaga Nasional, Kajang 43000, Selangor, Malaysia
Wan Hazdy Azad Wan Abdul Majid: Water Resources Management and Hydrology Division, Department of Irrigation and Drainage, Kuala Lumpur 68000, Malaysia
Hidayah Basri: Institute of Energy Infrastructure, Universiti Tenaga Nasional, Kajang 43000, Selangor, Malaysia
Mohammad Marufuzzaman: Institute of Energy Infrastructure, Universiti Tenaga Nasional, Kajang 43000, Selangor, Malaysia
Muzad Mohd Fared: Grid Maintenance Department, Tenaga Nasional Berhad, Kuala Lumpur 50470, Malaysia
Wei Chek Moon: Institute of Energy Infrastructure, Universiti Tenaga Nasional, Kajang 43000, Selangor, Malaysia

Sustainability, 2021, vol. 13, issue 18, 1-20

Abstract: Malaysia, being a tropical country located near the equatorial doldrums, experiences the annual occurrence of flood hazards due to monsoon rainfalls and urban development. In recent years, environmental policies in the country have shifted towards sustainable flood risk management. As part of the development of flood forecasting and warning systems, this study presented the urban flood simulation using InfoWorks ICM hydrological−hydraulic modeling of the Damansara catchment as a case study. The response of catchments to the rainfall was modeled using the Probability Distributed Moisture (PDM) model due to its capability for large catchments with long-term runoff prediction. The interferometric synthetic aperture radar (IFSAR) technique was used to obtain high-resolution digital terrain model (DTM) data. The calibrated and validated model was first applied to investigate the effectiveness of the existing regional ponds on flood mitigation. For a 100-year flood, the extent of flooded areas decreased from 12.41 km 2 to 3.61 km 2 as a result of 64-ha ponds in the catchment, which is equivalent to a 71% reduction. The flood hazard maps were then generated based on several average recurrence intervals (ARIs) and uniform rainfall depths, and the results showed that both parameters had significant influences on the magnitude of flooding in terms of flood depth and extent. These findings are important for understanding urban flood vulnerability and resilience, which could help in sustainable management planning to deal with urban flooding issues.

Keywords: flood hazard map; hydrological-hydraulic model; InfoWorks ICM; Probability Distributed Moisture (PDM); urban flood simulation (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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