An Assessment of Water Demand in Malaysia Using Water Evaluation and Planning System

Ali, Megat Syahirul Amin Megat; Saadon, Azlinda; Rahman, Nor Faiza Abd; Khalid, Khairi

doi:10.1007/978-981-4585-02-6_64

Cited by 14 publications

(9 citation statements)

References 2 publications

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“…The results indicated there is a potential of tapping into the majority of medium class lakes as alternative water sources during severe drought seasons, especially in a highly industrialized, commercialized and population density area. The rationale is the serious scenarios of insufficient water supply to meet water demands during long drought seasons for the past 5 years in Selangor and Kuala Lumpur, especially in the areas or district with high population densities and thriving businesses or industrial activities (Ali et al., ). Thus, tapping the potential of recreational lakes as alternative water sources to reduce water shortage crises is one solution seriously being considered by policymakers.…”

Section: Preliminary Findings and Discussionmentioning

confidence: 99%

“…Recreational lakes have been considered an influential factor in increasing residential and commercial property values, a favourite soft feature in landscaping as they provide amenity and aesthetic values to the general public and contribute a significant role in urban climate regulation (Larsona & Perrings, ; Tallis, Kennedy, Ruckelshaus, Goldstein, & Kiesecker, ; Tuttle & Heintzelman, ). They also have been seriously considered as alternative water supplies in high population density states, cities, district and towns during dry periods because of water shortage issues and supplies from main reservoir not being sufficient to meet water demands (Ali, Saadon, Abd Rahman, & Khalid, ; Xue, Yin, & Xie, ). The increasing concern is they are facing numerous threats attributable to rapid urbanization, subsequent increased human activities, significant changes in land‐use patterns, high population growth and, more recently, climate change impacts (Ding, Chen, Cheng, & Wang, ; Erol & Randhir, ; Liu, Long, Li, & Tu, ; Zessner et al., ; Zhu, Zhang, & Tong, ).…”

Section: Introductionmentioning

confidence: 99%

“…Similarly, a few studies on model development in relation to lakes have only focused on nutrient response models for shallow tropical lake (Sharip, Schooler, Hipsey, & Hobbs, ), eutrophication (Ishak, ) and water quality assessment of urban recreational lakes, which omit the watershed and surrounding land‐use influences (Oyekanmi, Nik Daud, Ahsan, & Pradhan, ). Recent studies (Ali et al., ; Sharip, Yanagawa, & Terasawa, ; Sharip, Saman, et al., ) focused only on water demand issues, assessment of spatial water quality dynamics and lake ecosystem dynamics in response to nutrient fluxes, respectively, using the application of commercial software.…”

Section: Introductionmentioning

confidence: 99%

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Development of spatial similarity‐based modelling to improve integrated lake water quality management in Malaysia

et al. 2018

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This study describes similarity‐based modelling techniques used to develop a spatially based water quality prediction model to facilitate sustainable lake water quality management. The lentic nature of lakes allows them to slowly absorb pollutants over a long period of time with readily noticeable signs, causing symptoms to appear only when the water quality has significantly degraded, meaning the risk of improper water quality management can be very high. Thus, failure to establish sustainable planning at the watershed scale was found to be a major threat of water quality degradation, from extemporary approaches often practised in lake management. Accordingly, the developed model is tailored for lakes facing moderate to serious water quality data limitation. The geodatabase integrates the identified driving factors of physical, social and water quality with significant influences on the status of lake water quality. A 1 km buffer radius with percentages of built‐up area, population, lake surface area and rainfall is measured. Calculation of a water quality index was then quantified on the basis of a similarity‐modelling technique. Lake Putrajaya was chosen as a control point for developing the indicator index. A total of 93 recreational lakes within Selangor and Kuala Lumpur were selected as modelling points. The results of this study indicated the similarity technique of spatial modelling is sufficiently reliable to be applied as an early assessment indicator. From the 93 lakes in this study, none feel in the category of either “bad” or “excellent,” with the majority being in class 3 (medium water quality status) and only four considered as having a good water quality condition. The balance of 35 lakes was considered to exhibit poor water quality. The model output is an indicator index, providing classification guidelines for the water quality status of the assessed lake as an early assessment tools.

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Section: Preliminary Findings and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Development of spatial similarity‐based modelling to improve integrated lake water quality management in Malaysia

et al. 2018

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“…It is becoming an absolute necessity for a good management of water resources allocation in order to equitably satisfy the drinking water needs of the population and the economic sectors. (Zerkaoui et al, 2018, Al-Shutayri, et Al-Juaidi,2019, Alemu et Dioha,2020, Ali et al,2014.…”

Section: Introductionmentioning

confidence: 99%

Long-Term Water Demand Assessment Using Weap 21: Case of the Guelma Region, Middle Seybouse (Northeast Algeria)

Boudjebieur¹,

Ghrieb²,

Maoui³

et al. 2021

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The Guelma sub-basin, an integral part of the Middle Seybouse basin, covers a surface area of 818 km 2 , subject to subhumid climate. The main surface water reservoir is the Bouhamdane dam with a regulated volume of 55 hm 3 . The main underground reservoirs are found in the aquifer systems of the Guelma plain, the Bouchegouf plain, the H'lia water table and the Heliopolis karst. To enable the rational use of water resources in the study region, integrated management of these resources remains essential. In this work we used WEAP 21 software (Water Evaluation and Planning), for the modeling of water resources, considering the year 2017 as the reference year for 2020-2050, with a base scenario «water demand". The results of the simulation show a significant water shortage of around 50.5 hm 3 , marking a scarcity of the resource, noticed from the reference year 2017, because of the unfavorable climatic conditions which significantly impacted the water reserve in the municipalities of the watershed. This shortage will decrease to a volume of 31 hm 3 in 2024, and 104.20 hm 3 in 2050.

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“…The basin became a first watershed in the country is initiated towards implementing of Integrated River Basin Management (IRBM) [19]. Many researchers were studied on the hydrological processes of the basin include a historical water discharges study [20]; the impact of land used change on discharge and direct runoff [21]- [24]; sustainable groundwater resources and environmental management [25]; the flood hazard mapping [26], [27]; the water supply [28], [29]; water quality [30] and a river bed properties study of the river basin [31], [32]. The most current in early 2014, the upper part of the basin was experienced the ammonia pollution due to the effluent Fig.…”

Section: Introductionmentioning

confidence: 99%

Application on One-at-a-Time Sensitivity Analysis of Semi-Distributed Hydrological Model in Tropical Watershed

Khalid¹,

Ali²,

Rahman³

et al. 2016

IJET

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Abstract-A soil and water assessment tool (SWAT) model has been employed for the Langat River basin, Malaysia to predict stream flows. The basin was divided into 27 sub basins comprising 193 hydrological response units. Monthly calibration and validation were performed using the measured discharge data of the Kajang station. One-at-a-time sensitivity analysis using Sequential Uncertainty Fitting (SUFI-2) algorithms was performed to examine the critical input variables of the study area. It was found that the SWAT model can be successfully applied for hydrological evaluation of the basin and the SCS runoff curve number, base flow alpha factor and groundwater delay were found to be the most sensitive parameters. The next step should be conducting a 30 years continuous hydrological modeling. It is needed to analyze the water balance and the hydrological trends of the basin due to the basin experienced major land used changes since 1980 for urbanization activities. IndexTerms-One-at-a-time sensitivity analysis, hydrological modeling, langat river basin, SUFI-2 algorithms.

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An Assessment of Water Demand in Malaysia Using Water Evaluation and Planning System

Cited by 14 publications

References 2 publications

Development of spatial similarity‐based modelling to improve integrated lake water quality management in Malaysia

Development of spatial similarity‐based modelling to improve integrated lake water quality management in Malaysia

Long-Term Water Demand Assessment Using Weap 21: Case of the Guelma Region, Middle Seybouse (Northeast Algeria)

Application on One-at-a-Time Sensitivity Analysis of Semi-Distributed Hydrological Model in Tropical Watershed

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