摘要
应用遥感与GIS相结合的方法 ,对陕北黄土高原地区的数字影像进行人 机交互的屏幕解译 ,得到 1990年、2 0 0 0年的土地利用 /覆盖数字地图 ,以及面积统计结果 .分析表明 ,近 10年来该地区建筑和工交用地逐年扩大 ,耕地面积保持稳定 ,果园面积显著增加 ,人工林地和森林覆盖率有较大幅度提高 ,荒野地占地比重下降 ,区域生态环境质量得到明显改善 .
By the integration of RS and GIS,with the TM data obtained from Landsat 5 in 1990 and the ETMplus data from Landsat 7 in 2000,and after geometrical rectifying and amplifying and man machine screen decoding data image,the map of eco environment and land use/cover in Yanhe watershed and its vicinities in 1990 and 2000 was obtained respectively,and the results of statistic analyses showed that in comparing with 1990,the artificial land in 2000 increased by 31%,the area of agricultural land was stable and that of orchard was 2.82 times more,and the area of artificial forest increased remarkably and that of shrub was 6 times more. The coverage rate increased to 13.88%,and the area of wilderness was 44.8% of that in 1990.The quality of eco environment was improved remarkably in this area.
出处
《应用生态学报》
CAS
CSCD
2003年第12期2187-2190,共4页
Chinese Journal of Applied Ecology
基金
国家自然科学基金项目 (3 0 170 790 )
教育部科技重点项目(0 3 15 7)
国家"863"计划资助项目(863 3 0 8)
