基于RS和GIS技术的凤阳县石英砂矿区用地动态变化监测

Monitoring of Land Use Change in Quartz Sand Mining Area of Fengyang County Based on RS and GIS

监测矿区土地利用变化对矿区生态环境的改善有着重要意义。该文以1991—2015年25年间的6期Landsat卫星遥感影像为基础,利用支持向量机对凤阳县石英砂矿区用地变化信息进行提取,为凤阳县矿产资源的可持续利用及生态恢复提供科学依据。结果表明:(1)1991—2015年间,矿区面积由6.84hm^2增加到438.12hm^2,净增加431.28hm^2,新增加的工矿用地主要由草地和林地转化而来。(2)矿区生态系统质量朝着变差的方向发展,造成了水土流失和水质污染等环境问题。

The land use change of the mining area is of great significance to the improvement of the ecological environment of the mining area.Based on the Landsat satellite remote sensing image from 1995 to 2015, the support vector machine is used to extract the land change information of Fengyang county, county mineral resources sustainable use and ecological restoration to provide a scientific basis.The results show that： （1） From 1991 to 2015, the area of mining area is from 6.84hm2 to 438.12hm2, the net increase is 431.28hm2, and the main grassland and forest land of newly added mining land are transformed. （2） The quality of the ecosystem of the mining area is developing in the di- rection of deterioration, resulting in environmental problems such as soil erosion and water pollution.