Ecological environment changes of mining areas around Nansi lake with remote sensing monitoring

Underground mining activity has existed for more than 100 years in Nansi lake. Coal not only plays a supporting role local social and economic development but also significant impact on the ecological environment region. Landsat series remote sensing data (1988~2019) are used to research of coal Then support vector machine (SVM) classifier is applied extract water area upstream lake from 1988 2019, spatiotemporal variation characteristics analyzed by Remote Sensing Ecology Index (RSEI). The results illustrate that change associated with annual precipitation. In terms quality, poor quality areas increased 101.782 km2, while good excellent decreased 218.988 km2 2009 2019. So compared 2009, worse then reason this due large-scale underground mining. Therefore, mines natural reserve may be closed or limited boundary protecting lake’s environment.