Qiantang River is one of the important rivers along the southeast coast of China. The following is a detailed introduction to it: Basic Facts • The name comes from: anciently called "Zhejiang", also known as "Jiang" and "Luochajiang". "Qian Tangjiang" one appeared late, may start to be "Qian Tang Zhejiang" or "Qian Tang Zhijiang" omitted, because the river flows through Qiantang County and got its name, Tang Gaozu Wude changed Qiantang County to Qiantang County in the first year, Qiantang River since then Qiantang River. • Geographical location: Huangshan Mountains in the west, Lingjiang River basin in the east, Xianxia Mountain in the south, and the Lixi River system in the north. The longitude and latitude ranges from 117°37' to 121°52' east longitude and 28°10' to 30°48' north latitude.• River length and basin area: The river length is 668 km, and the basin area is 55558 square km, spanning five provinces and cities of Anhui, Zhejiang, Jiangxi, Fujian and Shanghai. • The source and water system: there are two sources in the south and north, the south source is Lanjiang, the north source is Xin'an River, and the two sources are converging in Meicheng, Jiande City, and finally injecting into Hangzhou Bay. The main dry currents are Xin'an River, Lanjiang, Fuchun River, Qiantang River, and the main tributaries are Jiangshan Port, Wuxi Port, Jinhua River, Fenshui River, Puyang River and so on. Natural characteristics • Landform: The terrain of the basin is high in the southwest and low in the northeast. In addition to the dry inflow into the sea in the northeast corner, it is surrounded by a watershed composed of medium and low mountains. The watershed has many gaps, often separated by mountain basins. • Climate conditions: It is a subtropical monsoon humid climate, The monsoon alternates significantly, the four seasons are clear, the temperature is moderate, the rainfall is abundant, and the light and heat are abundant. • Hydrological characteristics: The estuary is a typical horn mouth shape, the water surface of the bay mouth is nearly 100 kilometers, and the width of the top of the bay is only 20 kilometers. This special terrain plus celestial gravity, Factors such as the accumulation of sand kans in the river have caused the tide from the Pacific to enter the estuary and the tide difference has increased rapidly, forming a spectacular Qiantang River tide. • Ecological resources: 11 species of zooplankton branch horns, 8 species of foot, 20 species of rotary insects, 11 species of protozoa; 203 species of fish, belonging to 55 families; Phytoplankton is divided into 7 gates and 61 species. History and culture • Historical changes: Before the East Jin Dynasty, the shoreline of the horn-shaped estuary from Hangzhou to Jinshan was relatively flat. After that, the north shore line stretched eastward and northward, and the south shore line silted up to the north into the three north plains, and the river road gradually moved north. • Cultural heritage: The cradle of Yue Culture, one of the sources of ancient Chinese culture, was born in the basin of the uphill culture, Xiaohuangshan ruins, Cross-huqiao culture, Hemudu culture and many other early human cultures. • Humanistic landscape: Rich Wang Shechao giant sculpture, Qiantang River Bridge and other cultural landscapes, as well as Qiandao Lake, Shuanglong Scenic Area, Qiliyu, Lushan and other scenic spots.