Each geographical zone has its own causes of swamps, If you turn to Russia, then:
- In the tundra zone, the main reason for the formation of swamps is small evaporation of moisture, plain area, t.e. There is no natural drain. As another factor, this is an eternal permafrost that prevents the penetration of water into the deeper layers of the Earth.
- The forest zone is characterized by superficial waterlogging of the soil, as well as a slight flow of water again.
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If everything is generalized, then the main causes of the appearance of swamps can be called:
- Excessive waterlogging;
- Absence or slowing down water flow;
- The presence of many years of permafrost;
- soil waters close to the surface.
