| 引用本文: | 陈沛源,李金文,俞巧, 等.基于SWAT模型的泾河流域地下水分布特征与水资源评价[J].灌溉排水学报,2021,(12):102-109. |
| CHEN Peiyuan,LI Jinwen,YU Qiao, et al.基于SWAT模型的泾河流域地下水分布特征与水资源评价[J].灌溉排水学报,2021,(12):102-109. |
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| 摘要: |
| 【目的】合理规划与可持续开发利用地下水资源。【方法】选取泾河流域为研究对象，利用SWAT分布式水文模型进行了径流模拟，采用泾川（三）站、杨家坪（二）站和张家山（二）站逐月实测径流量进行模型参数率定，在此基础上对泾河流域浅层地下水分布特征、地下潜水储量和可开采量进行了初步评价。【结果】研究区模型表现良好，R2和NS分别达到0.83和0.71，满足要求。流域地下水储量分布差异较大，储量下降严重，2009—2016年下降约65.9亿m3，下降速率为0.51亿m3/月。地下水资源评价结果表明，泾河流域平均补给量为3.44亿m3/a，平均地下径流模数为0.21 L/(s·km2)，总体可开采量为1.89亿m3/a。【结论】SWAT模型在进行地下水资源评价方面具有良好的评价效果和精度。 |
| 关键词: 泾河流域；SWAT模型；地下水分布特征；地下水资源评价 |
| DOI：10.13522/j.cnki.ggps.2021154 |
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| Evaluating Groundwater Resource and Its Distribution in Jinghe Basin Using the SWAT Model |
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CHEN Peiyuan, LI Jinwen, YU Qiao, et al
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| Abstract: |
| 【Background and objective】Continuously pumping groundwater over the past half century for crop production in northern China has resulted in a series of environmental and ecological issues. The shortage of freshwater resources has become a bottleneck in socioeconomic development of this region. Improving groundwater management is important not only to its sustainable use but also to keeping ecosystems in this region function. Achieving this goal needs to understand how groundwater dynamics responds to environmental changes, as well as its consequent spatial distribution. The objective of this paper is to demonstrate how the SWAT model can be used to evaluate groundwater resource and its spatial distribution at regional scale.【Method】We took Jinghe basin as an example. Groundwater flow, surface runoff and their underlying driving factors were simulated using the SWAT model. Monthly measured runoff from hydrological stations at Jingchuan, Yangjiaping and Zhangjiashan was used to calibrated the model parameters; the calibrated model was then used to evaluate changes in groundwater depth, shallow groundwater resource, as well as extractable groundwater in the basin.【Result】The calibrated model correctly reproduced the groundwater dynamics in the basin, with R2 and NS between the measured and simulated runoff being 0.83 and 0.71, respectively. The distribution of shallow groundwater depth varied widely in the basin, but it has been in decline. From 2009 to 2016, the shallow groundwater resource had reduced by 6.59 billion m3, decreasing at an average rate of 0.051 billion m3/month. We found that the average recharge rate to the groundwater in the basin was 0.344 billion m3/a, the average subsurface runoff modulus was 0.21 L/(s·km2), and the extractable groundwater resource was 0.189 billion m3/a.【Conclusion】The SWAT model is capable of modelling regional surface runoff and shallow groundwater dynamics. It can be used to evaluate groundwater resources and the response of groundwater dynamics to environmental change. |
| Key words: Jinghe river basin; SWAT model; spatial groundwater distribution; groundwater resource evaluation |
