基于GIS和RS的宁夏中部干旱带近30年土地利用动态变化分析

Analysis on land use change based on GIS and RS in middle arid region of Ningxia in recent 30 years

基于GIS和RS技术,以宁夏中部干旱带6期遥感影像作为基本数据源,将解译结果在ArcView中进行统计计算,在ArcGIS中分别将相邻两期进行叠加,生成不同时期的土地利用类型的空间转移矩阵,进而进行单一和综合土地利用类型变化动态度和土地利用程度的计算.结果表明,研究时段内,研究区各种土地利用类型面积变化速度最快的是城乡居民工矿用地,其次是林地、耕地、未利用地、草地和水域;研究区的综合土地利用类型变化动态度在研究初期略低,转换方向为单向的不均衡转换,其余阶段都较高,双向转换频繁,呈现均衡转换状态;研究区的土地利用程度指数虽然在研究时段内呈增加状态,但整体而言程度不高.

Based on GIS and RS technology , take the six periods of remote sensing images as the fundamental data source ,calculate the interpretation result in ArcView ,overlay the adjacent two periods images respectively in ArcGIS , the land use types conversion matrix of different times is obtained , then calculate the single and comprehensive land use dynamic variation and land use degree . The research result show ：during the period of study , the fastest area of change speed of land use type is urban and rural industrial residential land ,next are woodland ,farmland ,unused land ,grassland and water in the study area . The comprehensive land use dynamic variation is slightly low at the start of study ,change direction is unidirectional and unbalanced , the remaining stage are higher , bidirectional change is frequently , the state of balanced change is obvious in the study area . Although the index of land use degree is increasing , but overall is not very high .