The Evaluation of the Ecological Service of Soil Conservation Based on Multi- source Remote Sensing Data: A Case Study of Four Areas in Northern Hebei
XU Xu1,2, LI Xiao-bing1, HAN Nian-long1
1. College of Resources Science & Technology, State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing 100875, China;
2. Shenzhen Urban Planning and Land Development Research Center, Shenzhen 518034, China
Based on multi-source remote sensing data, rainfall data, DEM and soil property data obtained in northern Hebei, the authors used Universal Soil Loss Equation (USLE) to make a quantitative analysis of soil conservation capacities with the support of GIS technique. Then the soil conservation capacities were converted into capital stocks by making reference to the Specifications for Assessment of Forest Ecosystem Services in China, which was stipulated on May 1, 2008. Two kinds of ecosystem service values were considered, i.e., the value of preserved nutrient and the value of fixed soil. The results reveal that the total soil conservation capacity of northern Hebei was 7.55×108 t in 2008, and the corresponding value of this ecosystem service was 1.08×1012 Yuan. The soil conservation capacities and soil conservation values of woodland, scrubland and grassland are the largest three among the seven kinds of ecosystem values, so these three ecosystems play key roles in conserving soil in northern Hebei.The spatial distribution characteristics of soil conservation values of northern Hebei show that the average value of central mountain areas is higher than the average value of western plateau and eastern plain, because dense vegetation prevents soil from erosion in mountain areas and soil erosion intensity is slight due to flat terrain in the western and eastern parts. For solving the problem of soil erosion in northern Hebei, natural vegetation should be protected, especially in central mountain areas.
许旭, 李晓兵, 韩念龙. 基于多源遥感数据的生态系统保育土壤价值评估——以河北省北部四地市为例[J]. 国土资源遥感, 2011, 23(3): 123-129.
XU Xu, LI Xiao-bing, HAN Nian-long. The Evaluation of the Ecological Service of Soil Conservation Based on Multi- source Remote Sensing Data: A Case Study of Four Areas in Northern Hebei. REMOTE SENSING FOR LAND & RESOURCES, 2011, 23(3): 123-129.
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