基于综合判别法的广东省水土流失状况遥感分析

Remote Sensing Analysis of Soil and Water Loss in Guangdong Province Based on Synthetical Discrimination Method

以2009和2010年10 m分辨率的ALOS多光谱遥感影像为数据源,采用计算机自动分析与人机交互判别相结合的方法,对广东省水土流失状况进行了遥感分析。结果表明:广东省土地利用以林草地、水田、建筑用地、水域和旱地为主,植被覆盖状况良好,珠三角和粤西地区地形平缓,粤北山区地形起伏较大;全省水土流失总面积20945.87 km 2,其中自然侵蚀面积14781.06 km 2,人为侵蚀面积6164.81 km 2;全省水土流失以轻度和中度侵蚀为主,主要分布在河源、梅州和云浮等地,其中生产建设活动导致的人为侵蚀集中分布在惠州、清远和广州等地。

Taking ALOS multispectral remote sensing images with resolution of 10 m of 2009 and 2010,it conducted remote sensing analysis of soil and water loss consideration in Guangdong province by the methods of computer automatic analysis and human-machine interaction discrimination. The results show that the land use of Guangdong province are mainly forest and grass,arable land,building land,water area and dry land;the vegetation coverage is good;the Pearl River Delta and western Guangdong areas have smooth terrain,while the mountainous areas of north Guangdong have great relief. The total area of soil and water loss of Guangzhou province is 20 945.92 km^2,of which,the natural erosion area and man-made erosion area are 14 781.06 km^2 and 6 164.81 km^2 respectively. The soil erosion are mainly light and moderate erosion,mainly distributed in Heyuan,Meizhou and Yunfu city,of which,man-made erosion caused by production construction mainly distributed in Huizhou,Qingyuan and Guangzhou city.