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Watershed prioritization in the upper Han River basin for soil and water conservation in the South-to-North Water Transfer Project (middle route) of China

Environmental Science and Pollution Research volume 25, pages 2231–2238 (2018)Cite this article

Abstract

Watershed prioritization with the objective of identifying critical areas to undertake soil and water conservation measures was conducted in the upper Han River basin, the water source area of approximately 95,000 km2 for the middle route of China’s South-to-North Water Transfer Project. Based on the estimated soil erosion intensity in uplands and clustering analysis of measured nutrient concentrations in rivers, the basin was grouped into very-high-, high-, moderate-, and low-priority regions for water and soil conservation, respectively. The results indicated that soil erosion was primarily controlled by topography, and nutrients in rivers were associated with land use and land cover in uplands. Also, there was large spatial disparity between soil erosion intensity in the uplands and nutrient concentrations in the rivers across the basin. Analysis was then performed to prioritize the basin by the integration of the soil erosion intensity and water quality on a GIS platform in order to identify critical areas for water and soil conservation in the basin. The identified high-priority regions which occupy 5.74% of the drainage areas need immediate attention for soil and water conservation treatments, of which 5.28% is critical for soil erosion prevention and 0.46% for water conservation. Understandings of the basin environment and pollutant loading with spatial explicit are critical to the soil and water resource conservation for the interbasin water transfer project.

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Funding

The research is supported by a doctoral scholarship.

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Affiliations

  1. College of Water Sciences, Beijing Normal University, Beijing, 100875, China

    Haibing Wu

  2. Chinese Research Academy of Environmental Sciences, Beijing, 100012, China

    Haibing Wu

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  1. Haibing Wu
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Correspondence to Haibing Wu.

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Responsible editor: Philippe Garrigues

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Wu, H. Watershed prioritization in the upper Han River basin for soil and water conservation in the South-to-North Water Transfer Project (middle route) of China. Environ Sci Pollut Res 25, 2231–2238 (2018). https://doi.org/10.1007/s11356-017-0675-x

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  • DOI: https://doi.org/10.1007/s11356-017-0675-x

Keywords

  • Interbasin water transfer
  • Watershed management
  • Land cover and land use
  • Riparian zone
  • Water quality