Application of Remote Sensing Technology to the Ecology Quality Evaluation of Opencast Mine Area

In this paper, the rare earth mining area of southern Ganzhou in Jiangxi Province, China is taken as a study area. And the ecology quality evaluation mode based on remote sensing technology was built up to assess the ecology equality status of the opencast mine area. In order to determine the influence sphere on the surrounding ecology quality, the buffer zone method was introduced. The result shows that the rare earth mine exploitation has negative effects on vegetation coverage, biomass, water and soil loss and landscape. The ecology quality status became worse from 2000 to 2005, while better from 2005 to 2010 by comprehensively analyzing the ecology quality status in the study area. And the influence on the ecology quality status caused by rare earth mine exploitation is very great in zone 1500m, while very little out of zone 2500m. It suggests that the influence sphere on the surrounding ecology quality of rare earth mine exploitation is about 2500m.