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Effect of climate change on water resources in the Yuanshui River Basin: a SWAT model assessment

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Abstract

The Yuanshui River Basin is one of the most important river basins ensuring food production and livelihoods in the Hunan and Guizhou Provinces of China. Based on digital elevation model, land use, soil, and meteorological data, the soil and water assessment tool was used to analyze the response of water resources in the basin to climate change. Specifically, the monthly runoff from the Yuanshui River Basin was simulated. Runoff measurements from the 1961–1990 series were used to calibrate model parameters, and measurements from the 1991–2010 series were used for model validation. The Nash–Sutcliffe efficiency coefficient, correlation coefficient, and water balance error were used to evaluate the simulation results; the values obtained for these parameters were 0.925, 0.929, and 2.0%, respectively, indicating that the established model can be applied successfully to runoff simulations. To evaluate the effects of climate change and human activities on runoff, 24 different climate scenarios were modeled. By comparing the model simulation results with the baseline scenario, the effects of climate change were analyzed by year, during the dry season, and during extremely dry conditions. The results showed that runoff decreased with increasing air temperature and decreasing precipitation, and that the effects of rainfall on runoff were greater than those of air temperature. Under the same baseline conditions, the effects of climate change on runoff were most pronounced during extremely dry months.

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Authors and Affiliations

  1. China Institute of Water Resources and Hydropower Research, State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, Beijing, 100038, China

    Yingdong Yu, Jiahong Liu, Zhiyong Yang & Chao Mei

  2. Liaoning Normal University, Liaoning, 116000, China

    Yongqiang Cao & Jing Chang

Authors
  1. Yingdong Yu
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  2. Jiahong Liu
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  3. Zhiyong Yang
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  4. Yongqiang Cao
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  5. Jing Chang
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  6. Chao Mei
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Correspondence to Yingdong Yu.

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Yu, Y., Liu, J., Yang, Z. et al. Effect of climate change on water resources in the Yuanshui River Basin: a SWAT model assessment. Arab J Geosci 11, 270 (2018). https://doi.org/10.1007/s12517-018-3619-y

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