Assessment of Soil Erosion Dynamics Using the GIS-Based RUSLE Model: A Case Study of Wangjiagou Watershed from the Three Gorges Reservoir Region, Southwestern China
Assessment of Soil Erosion Dynamics Using the GIS-Based RUSLE Model: A Case Study of Wangjiagou Watershed from the Three Gorges Reservoir Region, Southwestern China
复制标题
基于GIS的RUSLE模型土壤侵蚀动态评估——以西南三峡库区王家沟流域为例
DOI：
10.3390/w10121817
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发表时间：
2018-12
期刊：
影响因子：
3.4
通讯作者：
Zhijian Mu
中科院分区：
文献类型：
--
作者：
Jinping Xue;Dongwei Lyu;Dingyong Wang;Yongmin Wang;Deliang Yin;Zheng Zhao;Zhijian Mu
三峡库区周边农业小流域是三峡库区的重要组成部分，但其水土流失严重。评价此类流域的土壤侵蚀动态有助于确定其原因和发展趋势，从而为区域尺度的水土保持提供科学信息。利用修订的通用土壤流失方程（RUSLE）模型，结合地理信息系统（GIS），研究了2002 - 2014年三峡库区中部农业小流域土壤侵蚀的时空格局。利用空间叠置分析和马尔可夫转移矩阵模型分析了土壤侵蚀强度的变化趋势和过程。研究期间，流域内土壤侵蚀速率的空间分布较为一致。侵蚀强度中等，平均土壤流失量为35.1 t·ha−1·年−1。降水是影响土壤侵蚀强度的主导因子。2002 - 2008年侵蚀强度向中等侵蚀强度转移，2008 - 2014年侵蚀强度呈下降趋势，说明近年来王家沟流域土壤侵蚀强度有所下降。这些结果表明，最近实施的综合土壤管理措施负责最近观察到的侵蚀模式。
The adjacent agricultural watershed is a vital component of the Three Gorges Reservoir Region (TGRR); however, it is affected by serious soil erosion. Assessing soil erosion dynamics in such watersheds is useful for identifying its causes and tendencies to develop, in turn providing scientific information for soil and water conservation at the regional scale. In the present study, the spatial and temporal patterns of soil erosion of a small agricultural watershed in central TGRR were investigated from 2002 to 2014 using the Revised Universal Soil Loss Equation (RUSLE) model, combined with Geographic Information Systems (GIS). The trends and processes of the overall soil erosion intensity were analyzed using spatial overlay analysis and the Markov transition matrix model, respectively. The spatial distribution of soil erosion rates within this watershed was relatively consistent during the study period. Erosion intensity was moderate, with a mean soil loss of 35.1 t·ha−1·year−1. Precipitation was a dominant factor influencing the intensity of soil erosion. Moreover, most erosion intensities shifted closely to middle grades from 2002 to 2008, and declined from 2008 to 2014, indicating that soil erosion in the Wangjiagou watershed has recently decreased. These results suggest that recently implemented integrated soil management practices were responsible for the recently observed erosion patterns.
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DOI：
--
发表时间：
2008
期刊：
Yunnan Geographic Environment Research
影响因子：
--
作者：
L. Ying
通讯作者：
L. Ying
影响因子：
6.4
作者：
Soyoung Park;C. Oh;S. Jeon;H. Jung;Chuluong Choi
通讯作者：
Soyoung Park;C. Oh;S. Jeon;H. Jung;Chuluong Choi
DOI：
--
发表时间：
2001
期刊：
Journal of Natural Resources
影响因子：
--
作者：
Tian Guangjin;Liu Jiyuan;Zhang Zeng-xiang
通讯作者：
Tian Guangjin;Liu Jiyuan;Zhang Zeng-xiang
影响因子：
2.9
作者：
M. Shirazi;L. Boersma
通讯作者：
M. Shirazi;L. Boersma
DOI：
--
发表时间：
2008
期刊：
Resources and Environment in the Yangtze Basin
影响因子：
--
作者：
Liao Xiao-yong;Luo Cheng-de
通讯作者：
Liao Xiao-yong;Luo Cheng-de