2005-2020年甘州区和临泽县土地利用动态变化研究

Research on the Dynamic Change of Land Use in Ganzhou District and Linze County from 2005 to 2020

监测和分析土地资源利用现状及其变化趋势,对当地经济和生态文明建设可持续发展具有重要意义。基于RS和GIS技术,对甘州区和临泽县2005—2020年四期的遥感影像进行土地利用分类,通过土地利用动态度变化掌握该区各土地利用类型变化去向,利用转移矩阵对矿区土地利用变化特征进行分析。研究结果表明:①由面积占比来看,未利用地最大,耕地、草地、建设用地次之,林地和水体的所占比例均很小。②2005—2020年各地类单一土地利用动态度的差异性较大,较为突出的是林地,年变化率为45.7%;其他地类的动态度均表现出小规模减少甚至还有上升的趋势,综合动态度为0.44%,变化呈现出阶段性。③各土地利用类型的转出面积及比例从大到小依次为草地>居民地>耕地>水体>林地>未利用地。总体而言,该研究区趋于良好的发展趋势。

Monitoring and analyzing the current situation of land resource utilization and its changing trend is of great significance to the sustainable development of local economy and ecological civilization construction.Based on RS and GIS technology,the land use classification of ganzhou district and Linze County from 2005 to 2020 was carried out by using remote sensing images.The change direction of land use types in the region was determined by the change of land use dynamic attitude,and the characteris⁃tics of land use change in the mining area were analyzed by using transfer matrix.The results show that:①in terms of area proportion,the unused land is the largest,followed by cultivated land,grassland and construction land,and the proportion of forest land and water body is very small.②From 2005 to 2020,there was a great difference in dynamic attitude of single land use in different regions,especially forest⁃land.The annual change rate was 45.7%,and the other land types showed a small decrease or even an in⁃crease trend.The comprehensive dynamic attitude was 0.44%,and the change showed stages.③The transfer area and proportion of each land use type in descending order were grassland>residential land>cultivated land>water body>forest land>unused land.In general,the study area tends to have a good development trend.