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利用隆林至百色高速公路沿线区域不同时相的ALOS数据和地形图,应用“3S”技术提取工程建设准备期与建设期的土地利用、坡度和植被覆盖度等因子,通过GIS叠加、对比分析等,获取项目建设区土壤侵蚀信息。研究结果表明:2008年8月至2009年8月期间,项目区耕地、草地、林地、水域分别减少了4.64、1.75、0.68和0.12 km2,而建设用地和未利用地却分别增加了5.28和1.91 km2,公路建设中损毁水土保持设施面积7.07 km2;植被覆盖中无明显覆盖面积从0.89 km2增加到6.75 km2,低覆盖面积从2.56 km2增加到6.65 km2;中度侵蚀面积从4.81 km2增加到8.08 km2,强烈侵蚀面积从1.79 km2增加到6.53 km2。公路建设造成土壤侵蚀程度加剧明显。
Based on the ALOS data and topographic maps at different time zones along the area from Longlin to Baise Expressway, the factors such as land use, slope and vegetation coverage in construction preparation period and construction period were extracted by using “3S ” technology. Comparative analysis, etc., to obtain soil erosion information of the project construction area. The results show that during the period from August 2008 to August 2009, the cultivated land, grassland, woodland and water area in the project area decreased by 4.64, 1.75, 0.68 and 0.12 km2 respectively, while the construction land and unutilized land increased by 5.28 and 1.91 km2, and the area of water and soil conservation facilities damaged in highway construction is 7.07 km2; no obvious coverage in vegetation cover increases from 0.89 km2 to 6.75 km2, and the low coverage area increases from 2.56 km2 to 6.65 km2; moderate erosion area increases from 4.81 km2 to 8.08 km2 , The area of intense erosion increased from 1.79 km2 to 6.53 km2. The degree of soil erosion caused by highway construction is aggravating.