Taihu Lake, located in the southern edge of the Yangtze River Delta, was called Zhenze and Juqu in ancient times, and also called Wuhu and Lize. It is one of the five largest freshwater lakes in China, ranking third, with a boundary of 30 55' 40 "~ 365 438+0 32' 58" north latitude and 65 438+065 438+09 52' 32 "~ east longitude.
Taihu Lake covers an area of 2,427.8 square kilometers, with a water area of 2,338.1square kilometer and a coastline of 393.2 kilometers. Its west and southwest are hills and mountains, and its east is dominated by plains and water networks. Taihu Lake is located in the subtropical zone, with a mild and humid climate and a monsoon climate. There are many rivers, ports and estuaries in Taihu Lake, with more than 50 major rivers entering and leaving.
Reasons for formation:
1, Hu Fei theory
It is the siltation of great rivers that led to the formation of Taihu Lake. Taihu Lake, Yangcheng Lake and Dianshan Lake in the Yangtze River Delta were originally big bays connected with the sea. As the Yangtze River and Qiantang River extend eastward and turn back, part of the sea surface is surrounded by the inland sea, and the mountains and rivers on both sides are continuously injected, diluting the water in the inland sea and becoming a freshwater lake.
2. Structural theory
Due to the neotectonic movement of the crust in Taihu Lake area, the Taihu Plain sank, the river diverted, and the Jingxi River system moved eastward, from a fault basin to a catchment basin, gradually becoming several small swamp lakes, and then gradually forming Taihu Lake.
3. Meteorological theory
In ancient times, thousands of years of continuous heavy rain, and in some years the annual precipitation even reached 6 billion tons, and a large number of low-lying areas in Taihu Lake area accumulated water year after year, thus forming today's Taihu Lake.
4. Storm flow theory
From 4000 to 6000 years ago, the climate was abnormal, and the continuous storm stream whirled. Thousands of years of violent storms increased the accumulation of water in shallow swamps and depressions in Taihu Lake area, and the water area expanded day by day, forming Taihu Lake.
Reference to the above content: Baidu Encyclopedia-Taihu Lake