[1]ZHANG Jiaqiong,LIU Zhang,YANG Mingyi,et al.Soil Erosion and Its Influence Factors on a Slope in the Wind-Water Erosion Crisscross Region on the Loess Plateau[J].Research of Soil and Water Conservation,2018,25(01):1-6,22.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
25
Number of periods:
2018 01
Page number:
1-6,22
Column:
Public date:
2018-02-28
- Title:
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Soil Erosion and Its Influence Factors on a Slope in the Wind-Water Erosion Crisscross Region on the Loess Plateau
- Author(s):
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ZHANG Jiaqiong1,2, LIU Zhang3, YANG Mingyi1,2, ZHANG Fengbao1,2, WANG Yongji1,2, DENG Xinxin1,2
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1. State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A & F University, Yangling, Shaanxi 712100, China;
2. Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China;
3. Rare Earth Research Institute of Baotou, Baotou, Inner Mongolia 014030, China
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- Keywords:
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soil erosion; slope variation; 137Cs tracing; wind-water erosion crisscross region; grain-size distribution
- CLC:
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S157
- DOI:
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- Abstract:
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The alternating effect of wind and water erosion intensified soil loss in the wind-water erosion crisscross region, and formed a complicated erosion environment on the Loess Plateau. This study selected a hill going from northwest to east in the Liudaogou watershed of Shenmu County as the site to collect soil samples used for measuring 137Cs and grain size. The distribution of soil grain size, erosion rate and the influence factors were studied. The results showed that grain-size and soil erosion had significant variations (p < 0.05) on two slopes with obvious undulation. The change of soil erosion was affected by conditions of underlying surface including slope position, gradient, vegetation, soils and land use type besides erosion forces (wind and rainfall). The results of principal component analysis showed that there were two components including all underlying surface factors. They explained that the variations of soil erosion ranged from 69.6% to 82.1%. The linear regression between soil erosion rate and these four factors (slope position, gradient, vegetation, soil and land use types) implied the importance of erosion forces besides underlying surface conditions. Unfortunately, spatial distribution of soil erosion on a single slope is unlikely to represent the general erosion pattern in this region, the 137Cs tracing technique and grain-size analysis were far away from quantitatively dividing the contribution of wind erosion and water erosion in the total erosion on the slope scale. Further study with better methods and techniques is necessary.