Earth Science Frontiers ›› 2022, Vol. 29 ›› Issue (3): 263-270.DOI: 10.13745/j.esf.sf.2022.1.27

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Evaluation of water resource multiple effect based on the analysis of water circulation: An example of the Beichuan River Basin upstream of the Yellow River

ZHU Liang1(), LIU Jingtao1,2,*(), ZHANG Yuxi1,2, LIU Dandan3, JIAO Shizhe4   

  1. 1. Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences, Shijiazhuang 050061, China
    2. China Geological Survey/Hebei Province Key Laboratory of Groundwater Pollution Mechanism and Remediation, Shijiazhuang 050061, China
    3. Hydrogeology Equipment Geological Survey Center, China Geological Survey, Baoding 071051, China
    4. ZhongYeDiKan Geotechnical Engineering Co., Ltd., Langfang 065200, China
  • Received:2021-11-05 Revised:2022-03-27 Online:2022-05-25 Published:2022-04-28
  • Contact: LIU Jingtao

Abstract:

To evaluate the effect of large-scale vegetation restoration on water resources in semi-arid areas, an evaluation model was created based on analysis of water circulation in watersheds in referencing to the Keynesian multiplier theory. Further, the variation trend of such effect with changing water circulation caused by vegetation restoration was evaluated from the perspective of generalized water resources. The water circulation conditions in the Beichuan River Basin have significantly changed owing to large-scale vegetation recovery. The surface flow coefficient before and after the vegetation recovery reduced from 0.254 to 0.207, and the base current coefficient reduced from 0.156 to 0.134 under nearly stable precipitation. The proportion of the effective water volume increased in the soil-vegetation system and decreased in the soil-groundwater system under terrestrial water circulation. The localized water resources response to 100 mm precipitation reduced by 6.55 mm; however, the generalized water responses response, with ecological response included, increased by 45.37 mm, or a 25.78% increase. Thus the change in water circulation significant increased water resources response to rainfall in the Beichuan River Basin. This changing trend of precipitation distribution in different water circulation sections as a result of vegetation recovery aligns well with the country’s core strategy for ecosystem conservation, and plays an important role in improving the overall water resources response to rainfall the semi-arid area.

Key words: generalized water resources, water circulation, vegetation restoration, ecological response

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