基于3S数字化产品的沟蚀参数快速提取方法研究

摘要

为快速、精确提取冲蚀沟参数,以GPS测量点为基准数据,对3S数字化产品进行对比分析,获取了栖霞市北岩子口沟流域29个冲蚀沟的面积、沟沿线长、冲沟侵蚀量等多种参数,建立了流域三维地面模型,探讨了冲沟的坡度等级分布,并指出利用该方法快速提取土壤侵蚀定量数据的精度和可行性问题.结果表明,3S数字化产品能有效提取侵蚀沟曲面面积,但对一些细小冲沟的侵蚀量精度反应不足,需要对研究方法和研究面积进行改进和提高.%In order to extract the parameters of gully quickly and correctly,The data acquired from the GPS points were analyzed and contrasted with 3S digital products.The 29 gully erosion's area,length,soil and water loss data were obtained in Beiyanzikou Valley in Qixia and the three dimensional ground model was established successfully.The distribution of the slope gradient about the gully erosion was discussed and the quantitative data of the soil erosion can be extracted and verified.The Results showed that the 3S digital products can effectively extract the surface area,but for some small gully erosions,the precision is limited,which indicated that the research echnique and research area need to be improved.