Dongqian Lake is a lake in Ningbo City, Zhejiang Province, China. It is 8.5 kilometers long from north to south and 4.5 kilometers wide from east to west, with a water area of 19. 14 square kilometers. It is the largest natural lake in Zhejiang Province and the main drinking water and irrigation source in Ningbo. The Lake District and its surrounding areas are under the jurisdiction of Dongqian Lake Town, Yinzhou District, Ningbo City, and are currently managed by Dongqian Lake Tourism Resort in Ningbo.
Dongqian Lake is also an important water conservancy project in Ningbo. There are seven weirs and nine ponds around the lake. The seven weirs are: Yan Qian, Hu Mei, Sumu, Mo Zhi, Pingshui, Dayan and Gao Qiu. Tang Jiu is Hu Mei Pond, Hu Mei Yantang, Sumutang, Mo Zhi Yantang, Dayantang, Pingtang, Yan Qian Pond, Fangjiatang and Gao Qiu Pond. Dongqian Lake has a subtropical monsoon climate, with an annual average precipitation of about 1374 mm, a minimum temperature of -8.3℃, a maximum temperature of 38.5℃ and an annual average temperature of 16.2℃. As the temperature of the lake is regulated, it is not only suitable for intensive cultivation, drought and flood protection, but also beneficial to shipping and summer heatstroke prevention. The water in Dongqian Lake irrigates more than 500,000 hectares of farmland in eight towns of Yinxian, Fenghua and Zhenhai, making the farmland around the lake rich year by year. There used to be a saying in Ningbo: "The land should be Dongxiang, and the son should be himself". Dongxiang's fields yield high every year, relying on the water of Dongqian Lake. Moreover, most of the drinking water in Ningbo depends on this lake.
During the long Paleozoic, the area around Dongqian Lake did not change much except for slow ups and downs and local transgression. At the end of Quaternary, there was obvious subsidence, and a large number of thick alluvium was deposited, and the periphery developed into sandbars. Due to the action of coastal currents and tides, siltation land is gradually formed outside the sandbar, and Dongqian Lake has become one of many sea-mark lakes. Dongqian Lake was recorded as early as the Jin Dynasty. Lu Yun (Shilong), a famous scholar in the Western Jin Dynasty, said in his book Answering Che Maoan that yi county "has great lakes in the west, famous mountains in the north, Lin Ze in the south and huge seas in the east". At that time, the county governed Shanshan, and the lake was in the west of the county. It can be seen that Dongqian Lake was called the Great Lake in the Jin Dynasty.
There is a dike on the lake, which is 4 kilometers long from east to west and divides the lake in two. Surrounded by lakes and mountains, 72 streams converge here, forming a huge natural reservoir. During the drought, the floodgates can be opened to irrigate the farmland in Fenghua, Yinxian and Zhenhai, and it is also a freshwater breeding base, so it is also called Wan Jinhu Lake. Former Taogong Crane in Dongqian Lake, Yuxiang Bookstore, Baibu Songcui, Yu Xia Solan, Shuanghongluo, Sunset in Erling, Shanglin Xiao Zhong, Lvting Su Yan, Yinwan Fishing Fire, and Baishi Xianping Ten Scenes.