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Water 2018, 10(8), 1105; https://doi.org/10.3390/w10081105

Joint Operation of Surface Water and Groundwater Reservoirs to Address Water Conflicts in Arid Regions: An Integrated Modeling Study

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1,2,5,*
1
School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
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Shenzhen Municipal Engineering Lab of Environmental IoT Technologies, Southern University of Science and Technology, Shenzhen 518055, China
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Department of Hydrology, Geological Survey of Denmark and Greenland, Copenhagen 1350, Denmark
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Department of Civil and Environmental Engineering, National University of Singapore, Singapore 117576, Singapore
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Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control, Southern University of Science and Technology, Shenzhen 518055, China
*
Author to whom correspondence should be addressed.
Received: 31 July 2018 / Revised: 17 August 2018 / Accepted: 17 August 2018 / Published: 19 August 2018
(This article belongs to the Special Issue Adaptive Catchment Management and Reservoir Operation)
Full-Text   |   PDF [6454 KB, uploaded 19 August 2018]   |  

Abstract

At the basin scale, the operation of surface water reservoirs rarely takes groundwater aquifers into consideration, which can also be regarded as reservoirs underground. This study investigates the impact of reservoir operation on the water cycle and evaluates the effect of the joint operation of surface water and groundwater reservoirs on the water conflict in arid regions through an integrated modeling approach. The Heihe River Basin (HRB) in northwestern China is selected as the study area. Our results show that the ecological operational strategies of a reservoir under construction in the upper HRB have a direct impact on the agricultural water uses and consequently affect other hydrological processes. The ecological operation strategy with a smaller water release and a longer duration is beneficial to securing the environmental flow towards the downstream area and to replenishing aquifers. With the joint operation of surface water and groundwater reservoirs, a balance among the agriculture water need, the groundwater sustainability in the Middle HRB and the ecological water need in the Lower HRB can be flexibly achieved. However, the joint operation can hardly improve the three aspects simultaneously. To resolve the water conflict in HRB, additional engineering and/or policy measures are desired. View Full-Text
Keywords: reservoir operation; integrated surface water-groundwater model; Heihe River Basin; environmental flow; irrigation reservoir operation; integrated surface water-groundwater model; Heihe River Basin; environmental flow; irrigation
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Tian, Y.; Xiong, J.; He, X.; Pi, X.; Jiang, S.; Han, F.; Zheng, Y. Joint Operation of Surface Water and Groundwater Reservoirs to Address Water Conflicts in Arid Regions: An Integrated Modeling Study. Water 2018, 10, 1105.

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