石嘴山市沿黄两岸土地利用变化分析研究

Study on Land Use Change in Shizuishan City along The Yellow River

采用2008年、2013年和2017年3期Landsat 4-5、Landsat 8卫星影像数据和ZY-3国产资源卫星影像数据,运用ARCGIS 10.3和ENVI 5.3软件,通过人工目视解译与非监督分类的手段,提取石嘴山市沿黄两岸的土地利用信息,定量分析石嘴山市沿黄两岸土地利用总体变化过程及影响因素。结果表明:石嘴山市2008-2017年,土地一直处于持续开发利用状态,主要表现为草地转化为建设用地和耕地,耕地、未利用地和建设用地的面积不断增加,分别占研究区沿黄两岸总面积比例的11.37%、38.4%和40.92%,同时草地的面积在持续减少,减少面积占总面积的4.7%。近10年石嘴山市沿黄两岸土地利用变化速度最快的是耕地、建设用地以及草地,其中建设用地和草地土地利用动态变化幅度处于缓慢下降趋势。

By use of the ZY-3 domestic resource satellites of 2008, 2013 and 2017, Landsat 8 and Landsat 4-5 satellite image data, using ARCGIS 10.3 and ENVI 5.3 software, the overall change process of land use along the Yellow River and influencing factors have been quantitatively analyzed through extracting land use information of Shizuishan City with artificial visual interpretation and unsupervised classification. The results show that in Shizuishan City, from 2008 to 2017 the land has been in sustained development and utilization, the grassland has transformed into construction land and cultivated land, the area of cultivated land, unused land and constriction land has increased constantly, taking up 11.37%, 38.4% and 40.92% of the total area of the research district along the Yellow River separately, meanwhile the area of grassland has continuously decreased with taking up 4.7% of the total area. In recent 10 years, the cultivated land, construction land and grassland changed in a rapid speed, and the dynamic degree of construction land and grassland has decreased slowly.