The boundary is between 30 55' 40 "~ 365 438+0 32' 58" north latitude and 65 438+09 52' 32 "~ 65 438+020 36' 65 438+00" east longitude, which spans Jiangsu and Zhejiang provinces, and is north. ?
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.
The upper reaches of Taihu Lake cover an area of 6.5438+0.9 million square kilometers. In ancient times, Tiaoxi River and Jingxi River collected water into the lake, which has not changed much so far. Tiaoxi River system originated in Tianmu Mountain, Zhejiang Province, which is the largest in the east and west.
The Jingxi River system originates from the foot of Yili Mountain and Maodong Mountain, and is divided into nanxi river system, Tao Ge Lake system and Jiangnan Canal system, and flows eastward into Taihu Lake.
There is a north-south dispatching channel between water systems. After the West Lake District of Jiangsu intercepted the water north of the Jiangnan Canal and entered the river, the drainage area of the river system was 608 1㎞? .
Extended data:
Hydrological characteristics of Taihu Lake
1, flow
Taihu Lake has an average annual runoff of 7.5 billion cubic meters and a storage capacity of 4.4 billion cubic meters. ?
2. Water level
The average water depth is 1.9 m, and the water storage capacity is 4.43 billion cubic meters. Spring rains increase in April every year, and the water level rises, reaching the highest in July and August. After September, the water level began to decline, and 1 1 and 12 entered the dry season, with the lowest water level in the following year.
Maximum water level 4. 62m (melon diameter1August 25th, 954) Minimum water level 2. 17m (melon diameter1Feb. 29th, 956).
3. Water temperature
The annual average water temperature in Taihu Lake is 17. 1℃,165438+4℃ in October and 25℃ in July. Thin ice with a thickness of 1-2 cm can only be seen in the bay or leeward bank all the year round, and the whole lake will only freeze in extremely cold years. In the past 65 years, the whole lake has only been frozen 10 times.
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