辽宁省细河流域土壤侵蚀监测方法对比研究

以辽宁省细河流域为例,基于RUSLE模型和环境与灾害监测预报小卫星HJ-1A/1B的CCD数据,计算了该流域的土壤侵蚀状况,将土壤侵蚀强度分级后的结果与多因素综合法得到的土壤侵蚀强度分级结果及2005年辽宁省土壤侵蚀遥感调查结果进行了对比验证。结果表明,HJ卫星的CCD数据适用于土壤侵蚀监测领域,RUSLE模型能够较好地应用于细河流域的土壤侵蚀监测中。2009年土壤侵蚀总面积比2005年第4次土壤侵蚀遥感调查结果有所降低,土壤侵蚀主要分布在西北和东南山区,其中强烈及以上等级的侵蚀则主要分布在"煤电之城"阜新市的露天煤矿地区。

Comparison of Soil Erosion Monitoring Methods in Xihe River Basin in Liaoning Province

Based on RUSLE model,quantitative monitoring of soil erosion was carries out in the Xihe River Basin using HJ-1A/1B data,DEM,TRMM and other data.Soil erosion estimation from the monitoring was compared to the classification using the multi-factor method.In addition,further validation for monitoring results was performed using remote sensing survey of soil erosion of Liaoning Province published in 2005.The comparison results show that CCD data produced by HJ-1A/1B was adequate for soil erosion monitoring and RUSLE model can be applied well to monitor soil erosion.Total erosion area in 2009 reduced significantly comparing with that in 2005.Soil erosion distributed mainly in northwest and southeast mountainous areas of the study site,and the opencast coalmines within the "coal city" of Fuxin City resulted in severe or even stronger soil erosion.