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首页> 外文期刊>The Science of the Total Environment >Evaluation of groundwater sustainability in the arid Hexi Corridor of Northwestern China, using GRACE, GLDAS and measured groundwater data products
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Evaluation of groundwater sustainability in the arid Hexi Corridor of Northwestern China, using GRACE, GLDAS and measured groundwater data products

机译：利用GRACE，GLDAS和测得的地下水数据产品评估西北干旱河西走廊的地下水可持续性

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摘要

The exploitation of groundwater resources is of great importance and has become crucial in the last few decades, especially in arid regions, where surface water resources are scarce and unreliable. The Hexi Corridor (HC) is one of the most agriculturally rich and densely populated areas of arid northwestern China. Increasing demand for water, due to rapid population growth, oasis expansion and urbanization, has increased groundwater use, resulting in wide-scale depletion in this region. Sustainable management of aquifers in the HC requires accurate estimates of the current situation of groundwater resource sustainability. In this work, groundwater storage anomaly (AGWS) were estimated using the Gravity Recovery and Climate Experiment (GRACE) satellite data, the Global Land Data Assimilation System (GLDAS) data and the water-table fluctuation (WTF) method based on in-situ groundwater level data. Combined with the groundwater sustainability index (SI_(GWS)), groundwater sustainability in the HC was then evaluated. Potential factors that could affect regional groundwater sustainability were analyzed by including and testing climate and socio-economic variables during the period of 1981 to 2016. We found that (1) groundwater in the HC has experienced a general deterioration (except for a sudden and sharp increase observed around 2002) in both storage and sustainability, from AGWS = 16.79 cm/year and SI_(GWS) = 0.46 (1985-1990) to △GWS = -28.96 cm/year and SI_(GWS) = 0.008 (2007-2016); (2) the lowest value of groundwater sustainability in the HC appeared in the central and eastern regions (SI_(GWS) = 0); (3) human activity was confirmed to be the dominant factor driving the processes of deterioration in groundwater sustainability in the HC, and during the research period, it is striking that relatively limited "positive" effects of the water management project were detected on the regional groundwater resource: this result indicates that damaged groundwater sustainability cannot be easily reversed unless a long-term management policy is implemented. This study also proves that GRACE gravity satellite data has great application potential in groundwater sustainability evaluation in arid regions, especially in developing countries where in-situ data are scarce, and highlights the importance of joint management of surface water and groundwater, in groundwater sustainability management.
机译：地下水资源的开发非常重要，并且在最近几十年中变得至关重要，特别是在干旱地区，那里的地表水资源稀缺且不可靠。河西走廊（HC）是中国西北干旱地区农业最丰富，人口最稠密的地区之一。由于人口的快速增长，绿洲的扩张和城市化的发展，对水的需求不断增加，导致地下水的使用量增加，导致该地区的大规模耗竭。 HC中含水层的可持续管理需要对地下水资源可持续性现状的准确估算。在这项工作中，使用重力恢复和气候实验（GRACE）卫星数据，全球土地数据同化系统（GLDAS）数据和基于原位的地下水位波动（WTF）方法估算了地下水储量异常（AGWS）。地下水位数据。结合地下水可持续性指数（SI_（GWS）），然后评估了HC中的地下水可持续性。通过纳入和测试1981年至2016年期间的气候和社会经济变量，分析了可能影响区域地下水可持续性的潜在因素。我们发现（1）HC中的地下水总体恶化（除了突然而剧烈的水在存储和可持续性方面的增长在2002年左右）从AGWS = 16.79 cm / year和SI_（GWS）= 0.46（1985-1990）到△GWS = -28.96 cm / year和SI_（GWS）= 0.008（2007-2016 ）; （2）中部和东部地区HC中的地下水可持续性最低值出现（SI_（GWS）= 0）; （3）已确认人类活动是造成HC地下水可持续性恶化过程的主要因素，并且在研究期间，令人惊讶的是，水资源管理项目对区域的相对“积极”影响是有限的地下水资源：该结果表明，除非实施长期管理政策，否则无法轻易逆转受损的地下水可持续性。这项研究还证明，GRACE重力卫星数据在干旱地区，特别是在缺乏实地数据的发展中国家的地下水可持续性评估中具有巨大的应用潜力，并强调了地表水和地下水联合管理在地下水可持续性管理中的重要性。 。

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  • 来源
    《The Science of the Total Environment》 |2020年第25期|135829.1-135829.13|共13页
  • 作者

    Sijia Wang; Hu Liu; Yang Yu; Wenzhi Zhao; Qiyue Yang; Jintao Liu;

  • 作者单位

    Linze Inland River Basin Research Station Chinese Ecosystem Research Network Lanzhou 730000 China Key Laboratory of Ecohydrology of Inland River Basin Northwest Institute of Eco-Environment and Resources Chinese Academy of Sciences Lanzhou 730000 China University of Chinese Academy of Sciences Beijing 100029 China;

    Linze Inland River Basin Research Station Chinese Ecosystem Research Network Lanzhou 730000 China Key Laboratory of Ecohydrology of Inland River Basin Northwest Institute of Eco-Environment and Resources Chinese Academy of Sciences Lanzhou 730000 China;

    China Institute of Water Resources and Hydropower Research Beijing 100038 China;

    State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Hohai University. Nanjing 210098 China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Groundwater sustainability; Arid region; GRACE; GLDAS; WTF method;

    机译：地下水可持续性;干旱地区恩典;GLDAS;WTF方法;

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