生态脆弱区土地利用时空格局变化分析——以宁夏中部干旱带为例  

Analysis of spatial-temporal changes of land use in ecologically vulnerable area——A case study in arid regions of central Ningxia

作　　者：贾科利[1] 张俊华[2] 

机构地区：[1]宁夏大学资源环境学院,宁夏银川750021 [2]宁夏大学新技术应用研究开发中心,宁夏银川750021

出　　处：《干旱地区农业研究》2011年第3期221-225,共5页Agricultural Research in the Arid Areas

基　　金：国家自然科学基金项目(40801219);宁夏大学211工程重点学科建设项目"草业科学与生态工程"子项目

摘　　要：利用1978年MSS及1987、1996和2007年Landsat TM/ETM遥感影像,借助GIS技术,对宁夏中部干旱带土地利用时空演变格局进行了分析.结果表明,1978～2007年,城镇用地增加最显著.变化率达58.03%;耕地面积变化率为1.61%,林地、草地、水域、未利用土地和沙地总体上呈减少趋势,变化率分别为-1.08%,-0.06%,-0.52%,-0.76%.,-1.34%.近30 a间,在自然与人类活动的共同作用下,各土地利用类型重心在空间上均有所迁移.总体上耕地、草地、城镇用地和水域重心向西南方向迁移;林地、未利用地基本向西北方向迁移;而沙地重心趋于向东南方向迁移.土地利用呈现衰退迹象.Using remotely sensed images obtained by Landsat MSS,TM and ETM sensors from the years of 1978,1987,1996 and 2007,supported by GIS,the spatial-temporal changes of land use in arid regions of central Ningxia were analyzed from 1978~2007.The results showed that the urban areas had most prominent increase, with a change rate up to 58.03%,the change rate of cultivated land was 1.61%.Forest land,grassland,water bodies,unused land,and deserts had the tendency of declining,with change rate of-1.08%,-0.06%,-0.52%,-0.76%,and-1.34%,respectively.Centroids of various land use types have moved under combined effects of natural forces and human activities during the last three decades.Overall, the spatial centroids of cultivated land,grassland,urban areas and water bodies expanded southwestward,while forest land and unused land expanded northwestward.Deserts,on the other hand expanded southeastward.The degree and variations of various land use change indices demonstrated that the land use in the study area was in a declining period.

关 键 词：土地利用 时空变化 宁夏中部干旱带 

分 类 号：F301.24[经济管理—产业经济]