Is there any data on soil erosion modulus in Shuozhou, Shanxi Province?

According to measurements in Youyu County, Shanxi Province, any slope covered by seabuckthorn can reduce surface runoff by 80%, reduce surface soil water erosion by 75%, and reduce wind erosion by 85%. Dense seabuckthorn forests growing in river valleys play a significant role in blocking floods and siltation and protecting banks. The thickness of fallen leaves in the three-year-old seabuckthorn forest can reach about 0.5 centimeters, the weight of fallen leaves can reach 10,500 kilograms per hectare, and there are 100 to 140 root nodules per cubic meter of soil. Sea buckthorn has root nodules and a large amount of litter, which can effectively improve the soil. In addition, sea buckthorn provides food and habitat for birds and animals, and sea buckthorn is also a precious tree species that combines economic and ecological benefits.

Shanxi Province Youyu Ecological Restoration Creates Saishang Oasis

Shanxi Provincial Forestry Department

Youyu County has successfully held two consecutive Ecological Fitness Tourism Festivals , so that every tourist can really enjoy the pleasure brought by the lush green. On August 20, the reporter came to the "Four Wastelands" land purchased by Wang Zhanfeng, a major water conservation and management company, in the closed area for interviews. The industrious Lao Wang has dammed 260 acres of land, developed more than 200 acres of orchards, and planted 3,000 acres of timber forests. He also built a pond and planned to vigorously develop his own "rural tourism" so that tourists can both pick and fish. He said that the ecological restoration is so good, we would be sorry if we didn’t use it.

Youyu County belongs to the area along the Great Wall where water erosion and wind erosion intersect. Wind erosion is particularly serious. It was once a barren land with "flat sand and wild yellow reaching into the sky". According to calculations by the local water conservancy department, the annual soil erosion modulus is 4,400 tons per square kilometer, and the annual erosion amount reaches 6.31 million tons.

In order to effectively improve the ecology of the county, Youyu began to implement ecological restoration projects in 2000. Ecological restoration first requires mountain closures and grazing bans. On the basis of conscientiously doing ideological work for the masses, the county combines blocking and dredging. While banning grazing in ecologically fragile areas, it also combines the implementation of the project of returning farmland to forests and grasslands to encourage the masses to plant crops. Forage, livestock are raised in pens. In recent years, the county has completed the conversion of 150,000 acres of farmland and 170,000 acres of perennial pasture beds; supported farmers in purchasing more than 800 dairy cows; built more than 1,700 sets of standardized housing and breeding pens; and improved 40 villages of local sheep. More than 24,000. Because the interests of the masses are ensured, the ban can be truly "sustainable, effective, and non-repeated." At the same time, in order to control the damage caused by human factors, the county began to relocate 2,276 households and 8,200 people from ecologically fragile areas in 2002; it invested more than 2 million yuan, set up more than 50,000 meters of fences in the closed areas, and set up 300 closed signposts. remaining block. Relying on projects such as the construction of Yanmenguan Ecological Livestock Economic Zone, comprehensive and comprehensive management of these areas has been launched.

The ecological restoration work has achieved multiple benefits through enclosure and protection measures that combine artificial management with natural restoration. The area of ??forest and grass vegetation has increased rapidly, and the forest and grass coverage rate in the county has reached 47%. Looking from a height, the forest and grass are luxuriant and lush; water and soil erosion has been effectively controlled, and the soil erosion modulus of the county has dropped from the original 4,400 tons/square kilometer. To 3,000 tons/square kilometer, the annual sand transport volume dropped from the original 6.31 million tons to 3.14 million tons, and the governance degree reached 49.6, achieving the goal of "small governance, large protection".