Modelling the flood vulnerability of deltaic Kuching City, Malaysia

Mah, Darrien Yau Seng; Putuhena, Frederik Josep; Hin, Lai Sai

doi:10.1007/s11069-011-9731-x

Cited by 10 publications

(8 citation statements)

References 12 publications

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“…Other research has evaluated the impacts of SLR in coastal and estuarine zones. For example, Mah et al [6] analyzed the effects of SLR on the city of Kuching (1 • N, Malaysia), located 30 km from the coast in the Saeawak River delta, at an altitude of 5 m. They concluded that a 10% tidal increase would result in a 6% increase in flooded surface area, compared to current levels. The tidal magnitudes in this area are much higher than those recorded in the Andalién River, reaching an average sea level of +4.5 m, which can be seen in the tidal influence up to 30 km upriver from the mouth of the Sarawak River.…”

Section: Discussionmentioning

confidence: 99%

“…In this regard, coastal floods have become a serious problem on a global scale [2,3]. Close to 50% of the global population is concentrated in coastal areas, which are densely populated and economically attractive [4][5][6]. In the 20th century, the frequency of floods and the magnitude of damages increased [7], and a significant further increase in flooding risk is expected in the 21st century, according to models of average sea level rise (ASLR) due to global climate change (GCC), land-use changes driven by global socioeconomic growth [4,[8][9][10][11], and population growth [12].…”

Section: Introductionmentioning

confidence: 99%

“…Floods in Mediterranean coastal basins are generally caused by intense precipitation [13,14]. When rivers form mixed estuaries in plains with low channel slopes, tides can become a key factor for flood generation [5,6,15]. The tide forms a boundary condition downstream in the estuary, which, synchronized with high discharges resulting from high amounts of precipitation, impedes the discharge of water, increasing the risk of flooding [4,16,17].…”

Section: Introductionmentioning

confidence: 99%

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Flooding in Central Chile: Implications of Tides and Sea Level Increase in the 21st Century

et al. 2018

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Coastal floods have become a serious problem on a global scale, increasing in frequency or magnitude due to natural conditions, and exacerbated by socioeconomic factors. This investigation analyzes the role of tides and average sea levels on the development and intensity of flooding in the lower section of the Andalién River, located toward the southern extreme of the coast of central Chile and northeast of Concepción, the country’s second most populous city. Numerical simulation (1D) was used in five modeled scenarios to determine potential flooding areas, demonstrating the influence of tides in flooding processes as far away as 7.3 km from the river mouth, which is reinforced by the fact that 57% of flooding events occur during syzygies. Further, a climate change-induced sea level rise of 60 cm from current levels by the end of the 21st century would produce a 4% increase in flood-prone areas, with 17% of flooding affecting the current built-up area and 83% of floodplains and salt marshes. Efforts must be made to protect or conserve these latter areas in order to increase natural resilience, given the high costs of implementing structural measures to protect future residential areas.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Flooding in Central Chile: Implications of Tides and Sea Level Increase in the 21st Century

et al. 2018

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“…ground elevation thus results in these points to obtain flood depths and its associated extents [7]- [8]. It would come out a basin-wide flood map in conjunction to the anticipated flood event.…”

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confidence: 99%

Modelling of Batang Rejang for Extreme Events

Mah¹,

Nam²,

Putuhena³

et al. 2013

JCEST

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Flood is a natural hazard. It happens when the water in a river channel is beyond the capacity of the channel to carry while the overflowing water is called as floodwater. Flood causes damage to life and property when it strikes a vulnerable population in the affected area. There are several townships located along Batang Rejang such as Kapit, Song, Kanowit and Sibu. The main objective of this paper is to develop a river model to map the extreme events for Batang Rejang. The method used in is river modelling by using InfoWorks RS software. This method is simulating the Batang Rejang in order to view the behaviours of the river in response to conditions and effects of extreme events over a given period of time. Flood maps computed from InfoWorks RS are for flood extent analysis as it provides insights to the damage for different locations at different flows. The maps are also useful for related authorities or parties to locate human activities at the catchment area and to carry out emergency flood plans in the future.

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“…METHOD A 1-D hydrodynamic model -InfoWorks River Simulation (RS) is utilized for modelling the hydraulics of Sarawak River systems. Examples of such modelling are reported by Mah et al[11]. What river modelling means in practical terms is that software incorporates the fundamental laws of moving water bodies along an open channel (in this case, St. Venant Equations) into a simulated environment where flows and water levels change over time.…”

mentioning

confidence: 99%

Incorporating Floodplain Inundation as a Strategy in Flood Mitigation Plan

Mah¹,

Bustami²,

Putuhena³

2012

JCEST

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This paper is promoting the awareness that nature and engineering structure can co-exist together. Natural floodplain inundation is usually restrained to separate floodplain lands for human uses. In contrary to conventional flood control systems, a vision of restoring floodplain inundation in Kuching Bypass Floodway is presented as a flood mitigation plan. Modelling of the approach indicates a reduction of flooded areas up to 61%. By means of modelling, portions of floodplains are virtually preserved in their natural states and functions, a role that often has been undervalued. Floodplain permits storage and conveyance of floodwaters. At the same time, it provides replenishment of the adjoining wetlands. The strategy proves beneficial to both human and natural systems. It also calls for a systemic change in flood management that we can live with the natural forces instead of forbidding them.

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Modelling the flood vulnerability of deltaic Kuching City, Malaysia

Cited by 10 publications

References 12 publications

Flooding in Central Chile: Implications of Tides and Sea Level Increase in the 21st Century

Flooding in Central Chile: Implications of Tides and Sea Level Increase in the 21st Century

Modelling of Batang Rejang for Extreme Events

Incorporating Floodplain Inundation as a Strategy in Flood Mitigation Plan

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