RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2016, Vol. 25 >> Issue (04): 671-678.doi: 10.11870/cjlyzyyhj201604018

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EVALUATION OF SOIL LOSS AND ECOLOGICAL BENEFIT IN THE HAN RIVER SOURCE

LI Xiao-yan, WANG Zhi-jie   

  1. Qinling and Intones Geography Research Institute, School of History and Tourism, Shaanxi University of Technology, Hanzhong 723000, China
  • Received:2015-03-04 Revised:2015-05-19 Online:2016-04-20

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Abstract: The soil erosion and ecological benefits in the water source region of middle route of South-to-North water transfer project were evaluated by using soil erosion coefficient and soil conservation coefficient based on USLE. The results show as follows. (1) The potential amount of soil erosion in the study area was large, and showed significant difference in spatial distribution. It was larger in the middle and high mountain region than that in the valley basin region. (2) The actual amount of soil erosion was lesser. However, the soil erosion coefficient was large with the obvious spatial distribution regularity. It was the largest in low mountain area and hilly region, and was relatively smaller in the middle and high mountain region and the valley basin region. Soil and water conservation measures and land use patterns have the high contribution to soil erosion. (3) The benefit of soil and water conservation was increased in the middle and high mountain regions, but was obviously decreased in the valley basin region, low mountain area and hilly regions. (4) The low mountain area and hilly regions should be the key monitoring and control area in the future soil and water conservation, and it should be the key ecological compensation area also.

Key words: Han River source, Soil erosion, Ecological benefits

CLC Number: 

  • S157
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