The amorous feelings of Hangzhou West Lake. Topography and climate

West Lake was called Wulin Water and Qiantang Lake in ancient times, also known as Xizi Lake. At first, it was a bay. Due to the long-term accumulation of sediment carried by river tides, the bay is isolated from the sea, forming a lagoon. After several generations of continuous dredging construction, it finally becomes a semi-closed shallow landscape lake. The shape of the West Lake is a nearly equiaxed polygon, which is divided into five sub-lakes by artificial dikes in Gushan, Su Causeway and Bai Causeway. There are three islands in the lake: Zhou Xiaoying, Hu Xinting and Ruan Gongdun. The sub-lakes are connected by bridge opening, and all the lakes can't be fully mixed, resulting in different characteristics of water quality in each lake area. Most of the runoff recharge first enters the three sub-lakes on the west side, and then enters the Outer West Lake. The total area of the lake is 6. 145 square kilometers. The total volume is 0.1.24.7 million cubic meters, and the average water depth is 2.27 meters.

The history of the West Lake is a history of protection and governance. It runs through the spirit and concept of China's traditional landscape culture and embodies the continuity of the history and culture of the West Lake.

The annual average temperature of West Lake in Hangzhou is 17.5℃.