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Dynamics of Soil Erosion in xingguo county, China, Determined Using Remote Sensing and GIS

Pedosphere 2005年第3期15卷 356-362页

作者： PANJian-Jun ZHANGTao-Lin ZHAOQi-Guo CollegeofResourcesandEnvironmentalSciences NanjingAgriculturalUniversityNanjing2100g5（China）／／InstituteofSoilScienceChineseAcademyofSciencesNanjing210008（China） InstituteofSoilScience ChineseAcademyofSciencesNanjing210008（China）

The spatial and temporal dynamics of soil erosion in xingguo county, Jiangxi Province, China were studied using multi-period remote sensing images and GIS. The results indicated that the soil erosion status of the region has been improving, particularly since the 1980s, with the erosion rate showing an evident decline over the past 30 years. The improvement showed not only in the decline of eroded soil area, but also with the reduction in the extent of erosion. The extent of erosion mainly changed by one level, and the change primarily occurred with the severely or moderately eroded soil types. However, in general, soil erosion was still an overriding problem in the region with some areas becoming more serious, especially those with large quantities of granite.

关键词： GIS remote sensing soil erosion spatial and temporal dynamics xingguo county

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Environmental Factors Affecting Temporal and Spatial Dynamics of Soil Erosion in xingguo county, South China

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Pedosphere 2005年第5期15卷 620-627页

作者： WANG Ku SHI Xue-Zheng YU Dong-Sheng SHI De-Ming CHEN Jing-Ming XU Bin-Bin LIANG Yin LI De-Cheng State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil Science Chinese Academy of Sciences.Nanjing 210008 （China） Department of Geography University of Toronto Toronto M5S 3G （Canada） Department of Geographic Science Minjiang University Fuzhou 350011 （China）

By using soil erosion maps of four different time periods and a digital elevation model (DEM), in combination withthe remote sensing and GIS technologies, soil erosion dynamics in xingguo county of Jiangxi Province in South Chinawere analyzed on both temporal and spatial scales in soils of different parent materials, altitudes and slopes. The resultsshowed that from 1958 to 2000 severe soil erosion was coming under control with a decreasing percentage of the land undersevere erosion. It was also found that the soils developed from Quaternary red clay, granite and purple shale were moresusceptible to soil erosion and that areas sitting between 200 to 500 m in altitude with a slope less than 3° or between7° to 20° where human activities were frequent remained to be zones where soil erosion was most likely to occur. Theseareas deserve special attention in monitoring and controlling.

关键词： GIS remote sensing soil erosion South China xingguo county

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