摘要
通过浙江省土壤侵蚀强度判别模型,确定影响浙江省水土流失的主导因子;以TM数据和航摄1∶1万DOM数据为遥感数据源,利用浙江省数字化地形图,结合样地调查,进行2009年浙江省水土流失遥感监测;以基于约束三角网技术的坡度因子提取方法、基于植被指数和像元二分模型的植被覆盖度因子提取方法以及土地利用因子提取方法,通过叠置分析实现土壤侵蚀信息提取。结果表明:浙江省水土流失面积呈逐年减少的趋势;经过野外调查验证,研究成果准确度高。
By using the discriminant model of soil erosion intensity in Zhejiang Province,the major factors affecting soil and water losses were determined.Taken the TM data and aerial photographs of scale 1∶10000 as data sources,the remote sensing monitoring of soil erosion in Zhejiang Province in 2009 were finished by using digital topographic maps and investigating on sample plots.In this paper,the following factors were extracted,the slope degree using the Delaunay TIN,the vegetation coverage by vegetation index and dimidiate pixel model,and the land use information.The degree of soil erosion were determined based on these data by overlay analysis,and the results were verified by field investigation.In conclusion,the area of soil erosion in Zhejiang Province was decreasing.
出处
《中国水土保持科学》
CSCD
2011年第2期4-10,共7页
Science of Soil and Water Conservation
关键词
土壤侵蚀
遥感监测
叠置分析
拓扑关系
soil erosion
remote sensing monitoring
overlay analysis
topological relationship
