A Model for the Optimal Allocation of Water Resources in a Saltwater Intrusion Area: A Case Study in Pearl River Delta in China

Liu, Dedi; Chen, Xiaohong; Lou, Zhanghua

doi:10.1007/s11269-009-9437-y

Cited by 87 publications

(40 citation statements)

References 26 publications

(31 reference statements)

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“…Although the Datengxia hydro-engineering project is often considered as the necessity to alleviate severe salt intrusion problems (D. Liu et al, 2009), our result indicates that improved water management policy (MP strategy) is an additional option for policy makers to take up the challenge. First, as the latest key hydro-engineering project in the PRB, the Datengxia reservoir is expected to alleviate the salt intrusion damage by providing extra discharge for salt suppression in the estuary.…”

Section: Policy Implicationsmentioning

confidence: 83%

“…The strategy to receive "extra supply" (ES) refers to the current government strategy that addresses severe salt intrusion with engineering projects(D. Liu, Chen, & Lou, 2009) . The strategy comprises the release of large amounts of freshwater from the upstream basin to the PRD when severe salt intrusion is projected to occur (Huang, 2009).…”

Section: Coping Strategiesmentioning

confidence: 99%

“…In delta area salt intrusion can also degrade water quality below acceptable levels and causes shortage events (Werner et al, 2013). Water shortages in China"s Pearl River Delta (PRD) have been reported as a result of increasingly severe salt intrusions during the dry season (D. D. Liu, Chen, & Lou, 2010).…”

Section: Introductionmentioning

confidence: 99%

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Analysing monthly sectorial water use and its influence on salt intrusion induced water shortage in urbanized deltas

Yao

Yan

Kabat

et al. 2016

Sustainable Cities and Society

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Analysing monthly sectorial water use and its influence on salt intrusion induced water shortage in urbanized deltas.Sustainable Cities and Society http://dx.doi.org/10.1016/j.scs. 2016.06.020 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.  Water shortage in a complex delta results from interplay of the dynamic processes. Analysing monthly sectorial water use and its influence on salt intrusion induced water shortage in urbanized deltas Hydro-engineering strategy alone cannot solve salt intrusion problem in the PRD. Improved water management policy can help alleviate the threats of salt intrusion. AbstractUrbanizing delta regions face seasonal water shortages induced by rising salt intrusion. Decreasing river discharge is readily listed as the major cause of water shortage events. Yet, observations of river discharge often fail to support this attribution. Evidence of the association between severe salt intrusion and water use is weak and inconclusive. The present study asks to what extent water use contributes to salt intrusion and freshwater shortages. Moreover, it asks whether management of water use rather than water supply can be part of mitigating salt intrusion. The contribution of water use in causing severe salt intrusion events is assessed by first quantifying monthly sectorial water use and next comparing it with threshold discharges from the graded salt intrusion warning system. The case study region is the Pearl River Delta, China. Sectorial water use is found to substantially vary between months. In particular in the dry month in which water shortages are reported, water use can be more than 25% of discharge and thus exacerbates salt intrusion. Evaluation of coping strategies shows that improved water use can alleviate salt intrusion by up to one level in the warning system, thus preventing problems at a number of water abstraction points.

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Section: Policy Implicationsmentioning

confidence: 83%

Section: Coping Strategiesmentioning

confidence: 99%

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Analysing monthly sectorial water use and its influence on salt intrusion induced water shortage in urbanized deltas

Yao

Yan

Kabat

et al. 2016

Sustainable Cities and Society

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“…Reduced low flow, in combination with rising sea levels, has caused severe saltwater intrusion in the delta (Li and Ao 2000). Increasing salinity poses a potential threat to water supply in the delta (Liu et al 2010). In a previous study, we showed that throughout the basin dry season rainfall and discharge are likely to reduce in the future due to climate change (Yan et al 2015).…”

Section: Problem Formulationmentioning

confidence: 86%

Identifying and Assessing Robust Water Allocation Plans for Deltas Under Climate Change

Yan

Werners

Huang

et al. 2016

Water Resour Manage

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Water scarcity threatens economic growth, social cohesion, and environmental sustainability in many deltas. This situation is likely to worsen due to future climate change. To reduce water scarcity and limit salt water intrusion in deltas, many countries have launched policies to allocate water resources. However, it is difficult to develop long-term adaptive water management policies due to large uncertainties. In this paper, we present a Robust Assessment Model for Water Allocation (RAMWA) to support decision making about water release of different key reservoirs under future climate change. The model was applied in the Pearl River basin, China to improve reservoir management, to ensure sufficient flow into the delta to reduce salt intrusion, and to provide sufficient freshwater for human and industrial consumption. Results show that performance of the existing water allocation plans reduces under climate change, as the plans are unable to sustain the required minimum river discharge. However alternatives generated by a Generic Evolutionary Algorithm (GEA) suggest that new plans can be developed which ensure minimum flows into the delta under most future climate change scenarios. The GEA plans perform better than existing plans because rather than following a fixed allocation schedule, the optimal water release for each reservoir is recalculated every 10 days based on observed discharge and storage in key reservoirs.

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“…Moreover, it requires no continuity-differentiability on objective functions, and has a good performance in problems with discrete decision variables (Morshed and Kaluarachchi 2000). Many researchers have applied it to water allocation problems (Davijani et al 2016;Nouiri 2014;Elferchichi et al 2009;Zahraie and Tavakolan 2009;Liu et al 2010). The algorithm includes a random, parallel, and adaptive search procedure, based on the mechanics of natural selection that is utilized to search for the fittest solution to a problem with multiple objectives.…”

Section: ) Maximize Reservoir Storagementioning

confidence: 99%

Assumption-Simulation-Feedback-Adjustment (ASFA) Framework for Real-Time Correction of Water Resources Allocation: a Case Study of Longgang River Basin in Southern China

Chen

Singh

et al. 2018

Water Resour Manage

Self Cite

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Water resources allocation is subject to uncertain future conditions and therefore needs real-time correction. This study develops a framework of Bassumption-simulationfeedback-adjustment^(ASFA) for real-time correction of water resources allocation. The assumption component constructs a water resources allocation model and generates initial allocation solution (IAS); the simulation component applies IAS in a real-time hydrological scenario; the performance information is input into the feedback component. Three feedback functions, including gain function, correlation function, and least square function, are employed to deal with the information, and the value of output gain is determined for the adjustment component. The result then is a feedback allocation solution (FAS). This study applied ASFA to Longgang River basin, China, as a case study, compared FASs generated by three different feedback functions as well as IAS. Results showed that FAS generated by the gain function (FAS_GF) performed better with a higher assurance rate and less risk of continuous water shortage. Results also showed that to achieve the same management requirement, FAS_GF had a lower requirement of the amount of diverted water, indicating that the ASFA framework can make better use of water resources and reduce the pressure of diverted water. The ASFA framework builds a feedback mechanism for real-time correction of Water Resour Manage (2018) water resources allocation, provides a novel perspective for addressing the challenge of future uncertainty, which significantly improves the solutions of water allocation.

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A Model for the Optimal Allocation of Water Resources in a Saltwater Intrusion Area: A Case Study in Pearl River Delta in China

Cited by 87 publications

References 26 publications

Analysing monthly sectorial water use and its influence on salt intrusion induced water shortage in urbanized deltas

Analysing monthly sectorial water use and its influence on salt intrusion induced water shortage in urbanized deltas

Identifying and Assessing Robust Water Allocation Plans for Deltas Under Climate Change

Assumption-Simulation-Feedback-Adjustment (ASFA) Framework for Real-Time Correction of Water Resources Allocation: a Case Study of Longgang River Basin in Southern China

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