密云县蕴藏有丰富的矿产资源，主要是铁矿，其余还有金矿、铬矿、花岗岩、石灰岩等。近年来，越来越多的单位和个人从事铁矿、金矿的开采、兴建砖厂、生产石灰。由于管理措施不力，导致水土流失加剧。因此做好密云水库上游的水土保持监督执法工作对于保护密云水库水质具有十 Miyun County is rich in mineral resources, mainly iron ore, the remaining gold, chrome ore, granite, limestone and so on. In recent years, more and more units and individuals are engaged in the mining of iron ore and gold mines, building brick factories and producing lime. Due to poor management practices, soil erosion has been aggravated. Therefore, the Miyun Reservoir upstream water and soil conservation supervision and law enforcement work to protect Miyun Reservoir water quality has ten