Geographical environment of the Great Wall Tourist Area in Huanghuacheng, Beijing

Beijing Huanghuacheng Water Great Wall Tourist Area is not only vast in mountains and rivers, but also rich in rivers and springs, rich in water sources and excellent in water quality. The headwater of Huaijiu River is located in Dazhuangke Township, Yanqing County, and consists of several mountain streams, such as Hanjiachuan, Dongerdao River and Cimuchuan. It passes through Yuxi water, enters Huairou, passes through Shihuyu and Daokou, and reaches Huanghua City. The upper section is called Huanghuachengxigou, with a drainage area of 85.6 square kilometers.