China News Service, Xining, November 13 (Reporter Zhang Tianfu) According to the latest two monitoring reports, the Qilian Mountains in the north of Qinghai Province and the Sanjiangyuan region in the south are dominated by freeze-thaw erosion, and compared to other types of erosion. , The freeze-thaw erosion area is large and the strength is high.
According to the Qinghai Provincial Department of Water Resources, the "Remote Sensing Monitoring Report on Soil Erosion in Qinghai Qilian Mountains in 2019" has recently passed technical review.
The monitoring results show that the types of erosion in the Qilian Mountain project area in 2019 mainly include three types: water erosion, wind erosion, and freeze-thaw erosion.
In terms of the average intensity of erosion types, the average intensity of freeze-thaw erosion is the largest, followed by water erosion, and the average intensity of wind erosion is the smallest; from the perspective of erosion area, the area of freeze-thaw erosion is the largest, followed by water erosion, and wind erosion is the least; from the geographical distribution It can be seen that wind erosion and freeze-thaw erosion are mainly distributed in the west of the project area, and water erosion is mainly distributed in the east of the project area.
According to the previous “Remote Sensing Monitoring Report on Soil Erosion of the Ecological Monitoring Project for the Second Phase of Qinghai Sanjiangyuan Ecological Protection and Construction Project in 2019”, in 2019, the type of soil erosion in the Sanjiangyuan area is dominated by freeze-thaw erosion, and engineering erosion is minimal, but Sanjiang The total area of soil erosion in the source area decreased by 21.46 square kilometers compared with the previous year.
The relevant person in charge of the Qinghai Provincial Soil and Water Conservation Center said that its monitoring results provide professional data support for the evaluation of the ecological environment in the project area, and also provide a reference for the local soil and water conservation construction.
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