Coupled surface water–groundwater model and its application in the arid Shiyang River basin, China
Coupled surface water–groundwater model and its application in the arid Shiyang River basin, China
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DOI：
10.1002/hyp.7333
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发表时间：
2009-07
影响因子：
3.2
通讯作者：
Litang Hu;Zhongjing Wang;W. Tian;Jianshi Zhao
中科院分区：
文献类型：
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作者：
Litang Hu;Zhongjing Wang;W. Tian;Jianshi Zhao
在石羊河流域水资源的规划和管理方面，中国需要一个工具来评估地下水和溪流使用对供水可靠性的影响，并改善许多与环境相关的问题，如最近与水有关的人类活动导致的土壤沙漠化。建立了基于规则集总地表水模型和分布式三维地下水流动模型的耦合模型，研究了石羊河流域下游恶化生态环境恢复可能设计的地表水和地下水管理情景。在24口观测井中，66%以上的水位模拟误差小于1.0m，柴旗水文站地表径流模拟与观测的时间变化趋势基本一致。校准被认为是令人满意的。初步确定了包括农业节水工程、流域内调水和跨流域调水、减少农业灌溉面积和下游地表水使用量而不是开采地下水的水资源分配框架，从而使整个流域的水资源得到合理利用。为了找出最合适的管理策略，对16种情景进行了建模。结果表明，在选定的两种管理方案中，民勤流域地下水盈亏平衡约为1.4×108m~3/a，生态环境将得到明显改善，而武威流域地下水盈亏约为0.8×108m~3/a，未来30年可满足生活、工业和城市绿地用水需求，但石羊河流域农业用水短缺约2.2×108m~3/a，建议加强跨流域调水，以实现石羊河流域水资源的可持续利用。版权所有©2009 John Wiley&Sons，Ltd.
The planning and management of water resources in the Shiyang River basin, China require a tool for assessing the impact of groundwater and stream use on water supply reliabilities and improving many environment‐related problems such as soil desertification induced by recent water‐related human activities. A coupled model, integrating rule‐based lumped surface water model and distributed three‐dimensional groundwater flow model, has been established to investigate surface water and groundwater management scenarios that may be designed to restore the deteriorated ecological environment of the downstream portion of the Shiyang River basin. More than 66% of the water level among 24 observation wells have simulation error less than 1·0 m. The overall trend of the temporal changes of simulated and observed surface runoff at the Caiqi gauging station remains almost the same. The calibration was considered satisfactory. Initial frameworks for water allocation, including agricultural water‐saving projects, water diversion within the basin and inter‐basin water transfer, reducing agricultural irrigation area and surface water use instead of groundwater exploitation at the downstream were figured out that would provide a rational use of water resources throughout the whole basin. Sixteen scenarios were modelled to find out the most appropriate management strategies. The results showed that in the two selected management options, the groundwater budget at the Minqin basin was about 1·4 × 108 m3/a and the ecological environment would be improved significantly, but the deficit existed at the Wuwei basin and the number was about 0·8 × 108 m3/a. Water demand for domestic, industry and urban green area would be met in the next 30 years, but the water shortage for meeting the demand of agricultural water use in the Shiyang River basin was about 2·2 × 108 m3/a. It is suggested that more inter‐basin water transfer should be required to obtain sustainable water resource use in the Shiyang River basin. Copyright © 2009 John Wiley & Sons, Ltd.