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Spatial Distribution of Soil Erodibility in Upper Yangtze River Region
Abstract:
Soil erodibility is the K factor in the universal soil loss equation (USLE). It is generally characterized through soil physical properties-based indices. The soil erodibility of the Upper Yangtze River basin was determined by the national second soil survey data of China. The results shown that the formula calculated K in USLE model has its limitation in the area when the soil organic matter content is bigger than 12 %. An updating relation was developed by 26 sample points’ properties data. The mean value of soil erodibility in study area is 0.0344, and the biggest value distributed in Sichan basin due to the influence of terrain. Soil erodibility in the study area distributes evenly.
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2944-2947
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December 2012
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© 2013 Trans Tech Publications Ltd. All Rights Reserved
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