Conditions for the formation of Chagan Lake wetland

The most direct reason for the formation of wetlands is generally in the plains, especially in the estuary of the plains, where there must be the influence of rivers and oceans to form such wetlands.

Chagan Lake National Nature Reserve is located in the west of Jilin Province, with east longitude12410' ~12432' and north latitude 45 10' ~ 45 2 1', which spans three counties (cities) of Da 'an, Gan 'an and Guo Qian. The nature reserve belongs to the inland wetland and aquatic ecosystem type, with a total area of 506.84 square kilometers, and the peripheral reserve area is 146.66 square kilometers.

This nature reserve is a typical nature reserve in semi-arid area, which mainly aims at protecting lake aquatic ecosystem, wetland ecosystem and wild rare and endangered birds. Chagan Lake wetland is a complex of lakes, swamps and swamp meadows. It is a typical wetland ecosystem with shallow lakes as the core of temperate meadow grassland, and it is one of the important lake wetlands in Northeast China.

The remarkable feature of wetlands in nature reserves is that the surface water is abundant; More moisture leads to soil incubation, and the incubation layer is obvious; Affected by much water, there are hygrophytes, swamp plants, aquatic plants or hygrophilic halophytes, which belong to highly suitable wetlands.

There are three core areas (Xindianpao, Gaojia and Miaodong) in the nature reserve, with an area of 155 438+0 square kilometers, accounting for 3 1% of the nature reserve area. There are 3 buffer zones with an area of 193.34 square kilometers, accounting for 38% of the protected area; The rest is the experimental area, with an area of 158. 19 km2, accounting for 3 1% of the nature reserve.