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2021 Vol. 48, No. 6
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HE Jianbo, LI Yushan, HU Litang, YIN Zheng, HU Yanbin. Numerical simulation studies of the influences of water transferring project from the Haerteng River to the Dang River on groundwater levels in the Dunhuang Basin[J]. Hydrogeology & Engineering Geology, 2021, 48(6): 34-43. doi: 10.16030/j.cnki.issn.1000-3665.202012018
Citation: HE Jianbo, LI Yushan, HU Litang, YIN Zheng, HU Yanbin. Numerical simulation studies of the influences of water transferring project from the Haerteng River to the Dang River on groundwater levels in the Dunhuang Basin[J]. Hydrogeology & Engineering Geology, 2021, 48(6): 34-43. doi: 10.16030/j.cnki.issn.1000-3665.202012018
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Numerical simulation studies of the influences of water transferring project from the Haerteng River to the Dang River on groundwater levels in the Dunhuang Basin

  • 1.

    Hydrogeological Engineering Geological Prospecting Institute, Gansu Provincial Bureau of Geology and Minerals Exploration and Development, Zhangye, Gansu　734000, China

  • 2.

    Key Laboratory of Groundwater Engineering and Geothermal Resources in Gansu Province, Lanzhou, Gansu　730050, China

  • 3.

    College of Water Sciences, Beijing Normal University, Beijing　100875, China

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Received Date:  10 December 2020
Revised Date:  20 March 2021
Publish Date:  15 November 2021
    Abstract

  • The objective of the Integrated Planning of Rational Water Resources Utilization and Ecological Protection (2011-2020) issued by the State Council is to relieve the contradiction of reasonable water resource utilization and ecological protection. After the implement of the planning in recent years, visible water area is added, and the necessities of the planning is doubted. Groundwater is an important water source, and is also one of key factors affecting the ecology in the Xihu Nature Protection Area. Aiming at an quantitative analysis of the tempo-spatial changes of groundwater levels under different transferred scenarios, this study establishes a three-dimensional groundwater flow numerical model, and calibrates and verifies the model using much data such as long-term observation well data and additional water level data obtained through field investigation. The model results show that groundwater storage in the study area is under a negative equilibrium state with a yearly average value of 0.04×108 m3, mainly distributed in the Danghe alluvial fan and the north part of the Dang River irrigation area. The yearly averaged groundwater storages in this irrigation area and the core region of the West Lake Protected Area have the decrement of 2.62×106 m3 and 9.99 ×106 m3, respectively. Scenarios analysis based on the different amount of water transferring project, which are 0.8×108 m3/a, 0.9×108 m3/a, 1.0×108 m3/a and 1.2×108 m3/a, are carried out by using the established model, and the results indicate that groundwater levels are increased around 5.0～20.0 m in the Danghe alluvial fan and 7.0～15.0 m in the Crescent Moon Spring area after 50 years. However, groundwater levels in the West Lake Protected Area has a slow increase trend of 0.5 m in the predication period. Subsurface runoff is important and sustainable recharge sources in the West Lake Protected Area, but the water transferring project may improve the slow recovery groundwater levels in the West Lake Protected Area. The results of this study will provide important references for argument of the implement of the water transferring project.

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