徐州煤矿区土地利用变化分析

以3个时相的卫星遥感图像TM为主要数据源,利用神经网络分类法进行监督分类,获得1987-2003年间徐州煤矿区土地利用变化的基础数据.由此计算出土地利用类型的动态转移矩阵、土地利用程度变化指数、动态度指数、土地利用变化类型的多度和重要度指数等区域土地利用变化的指数模型,定量分析该区土地利用变化情况.结果显示:①建设用地和水体的面积均保持持续上升的势头;耕地呈现持续下降态势;林地先减少后增加;未利用地面积则呈现出先增加后减少态势.②在1987-2003年间,建设用地和未利用地都主要转向耕地.在1987-1994年间,水体主要向林地转移;耕地主要转向未利用地和建设用地;林地主要转向耕地.在1994-2003年间,水体的转移比例很小;耕地主要转向未利用地和林地;林地主要转向水体.③在1987-2003年间,该区土地利用变化的剧烈程度很大,并且其土地利用正处于一个衰退期.④在1987-1994年间,主要的土地利用变化类型分别是:未利用地与耕地、耕地与建设用地之间的相互转化.在1994-2003年间,主要的土地利用变化类型分别是:耕地转化为未利用地、耕地转化为林地、未利用地转化为耕地、耕地转化为建设用地.

Land Use Changes in Xuzhou Coal Mining Area

Based on the three temporal satellite remote sensing TM images of Tongshan county located in Xuzhou city,basic data about land use of Xuzhou coal mining area are obtained with the neural network classification module from 1987 to 2003.According to the basic data of land use,the land use change is quantified by way of computing the index models of regional land use change.The following results were obtained:(1)The areas of construction land and water body have continually increased from 1987 to 2003.In this period the area of construction land has increased by 4761.09 hm2.On the contrary,the area of cropland has constantly decreased with a decrease of 27528.21 hm2.(2)From 1987 to 2003,both the construction land and unused land were chiefly transformed into cropland.From 1987 to 1994,the water body was chiefly transformed into woodland.The cropland was chiefly transformed into unused land and construction land.The woodland was chiefly transformed into cropland.From 1994 to 2003,the water body was infrequently transformed.The cropland was chiefly transformed into unused land and woodland.(3)From 1987 to 2003,the variation index of land use degree and the dynamic degree index of land use demonstrate that land use in Tongshan county was in a decline period and the changes were drastic.