延安市土壤侵蚀和土地利用时空变化分析  

Spatial and Temporal Variability of Landuse and Soil Erosion in Yan'an City

作　　者：卓静[1] 刘安麟[2] 邓凤东[2] 

机构地区：[1]西北大学城市与资源学系,陕西西安710127 [2]陕西省农业遥感信息中心,陕西西安710014

出　　处：《水土保持通报》2008年第3期148-151,共4页Bulletin of Soil and Water Conservation

基　　金：国家科技攻关项目“西北地区生态环境动态监测、综合评价和应用服务系统研究”(2004BA522D07-1)

摘　　要：以TM影像为数据源,动态监测了延安市宝塔区1997,2004年的土地利用、土壤侵蚀的时空变化,并对该变化进行了分析。结果表明,宝塔区土壤侵蚀主要发生在耕地、林地、草地、果园这4种土地利用类型中;1997—2004年期间,宝塔区耕地面积大幅减少,林地、草地面积有所增加,土壤侵蚀面积减少,侵蚀等级下降。总体上来说,延安市土地利用和土壤侵蚀状况都是向良性循环发展的。In order to dynamically monitor soil erosion and determine the relationship between landuse and soil erosion in Baota District of Yan＇an City, an analysis was performed using the data from TM images in the two periods of 1997 and 2004. Results show that soil erosion occurred in cultivated land, forestland, grassland, and orchard. The area of cultivated land decreased and the areas of woodland, grassland, and orchard increased from 1997 to 2004. The area of soil erosion decreased and its grade descended. Generally speaking, landuse and soil erosion control in the study area develop towards a good direction.

关 键 词：宝塔区 土壤侵蚀 土地利用 TM图像 

分 类 号：S157[农业科学—土壤学] F301[农业科学—农业基础科学]