Qinhuai River
Nanjing is located at the lower reaches of the Yangtze River. The Yangtze River runs diagonally across the city from southwest to northeast. It is about 93 kilometers long and more than 300 kilometers away from the sea entrance. The Qinhuai River rushes from south to north, passes through the main urban area, and joins the Yangtze River. It is known as the mother river of Nanjing. Xuanwu Lake and Mochou Lake are like two pearls embedded in the main city. The water area of the city now accounts for about 11%. The river and lake water system mainly belongs to the Yangtze River system, and only the rivers that flow into Gaoyou Lake and Baoying Lake in the northern part of Liuhe District belong to the Huai River system. The Yangtze River system includes the Qinhuai River system in the south of the Yangtze River, the Chuhe River system in the north of the Yangtze River, the riverside system formed by small rivers that flow into the river on both sides of the river, the two lakes system composed of Shijiu Lake and Gucheng Lake, and the West Taihu Lake system in the east of Gaochun. The groundwater resources are abundant and the water quality is excellent, and the Pukou Pearl Spring is particularly famous. Jiangning Tangshan and Pukou Tangquan are hot spring areas with a long history.