West Lake, located atNo. 1 Longjing Road, Xihu District, Hangzhou City, Zhejiang Province, China, is located in the west of Hangzhou City. The West Lake Scenic Area covers a total area of 49 square kilometers, with a catchment area of 2 1.22 square kilometers and a lake surface area of 6.38 square kilometers.
Xiangxi, west and north are surrounded by mountains on three sides. Bai Causeway, Su Causeway, Yang Gongdi and Zhao Gong dikes in the lake divide the lake into several water surfaces. The outline of the lake is nearly oval and the bottom of the lake is relatively flat. The average water depth is 2.27 meters, the deepest is about 5 meters and the shallowest is less than 1 meter. The natural surface water sources of the West Lake are Jinsha River, Longhong River, Chishan River (Yin Hui) and Changqiao River. West Lake is located on the edge of hills in the southeast of China, on the northern edge of the middle subtropical zone. The annual average total solar radiation is between100-10 kcal/cm2, and the sunshine hours are 1800-2 100 hours.
Hydrological characteristics of West Lake
The catchment area of the West Lake is 2 1.22 square kilometers, the annual runoff of the basin is1.4000 cubic meters, the storage capacity is close to1.4000 cubic meters, and the natural alternation of water is 654.38+0 times/year. The outline of the West Lake is nearly oval, and the bottom of the lake is relatively flat. The natural surface water sources of the lake are Jinsha River, Longhong River, Chishan River (Yin Hui) and Changqiao River.
The water level of the lake is maintained at 7. 15m and the elevation of the Yellow Sea is 0.05m, with the highest water level of 7.70m and the lowest water level of 6.92m, with a difference of 50cm. The storage capacity is about14.294 million cubic meters. The average water depth of the lake is 2.27 meters, the deepest is about 5 meters and the shallowest is less than 1 meter. The average annual precipitation in the lake is 5.629 million cubic meters. The scouring coefficient of water system is 1.49. When the gate is closed in the dry season, the flow velocity is equal to 0, even in the flood season, the general flow velocity is only below 0.05 m/s ... The West Lake takes water from Qiantang River, which is about 65.438+0.2 billion cubic meters per year.
The above contents refer to Baidu Encyclopedia-West Lake.