Study on Dynamic Changes of Soil Erosion in the North and South Mountains of Lanzhou

The North and South Mountains of Lanzhou City are the ecological protection barriers and an important part of the ecological system of Lanzhou City. This study takes the North and South Mountains as the study area, calculates the soil erosion modulus of the North and South Mountains of Lanzhou City based on the five major soil erosion factors in the RUSLE model, and analyses the spatial and temporal dynamics of soil erosion in the North and South Mountains of Lanzhou City and the soil erosion characteristics under different environmental factors. The results of the study show that: The intensity of soil erosion is dominated by slight erosion, which was distributed in the northwestern and southeastern parts of the North and South Mountains in 1995, 2000, 2005, 2010, 2015 and 2018. Under different environmental factors, the soil erosion modulus increased with elevation and then decreased; the soil erosion modulus increased with a slope; the average soil erosion modulus of grassland was the largest, followed by forest land, cultivated land, unused land, construction land, and it was the smallest for water; except for bare land, the average soil erosion modulus decreases with the increase of vegetation cover; Soil erosion modulus was the greatest in the pedocal of the North and South Mountains, and the least in the alpine soil.

Automated summary

This study focuses on the North and South Mountains of Lanzhou City and analyzes the spatial and temporal dynamics of soil erosion as well as the characteristics under different environmental factors. The results show that slight erosion dominates the region, with higher intensity in the northwestern and southeastern parts. The soil erosion modulus varies with elevation, slope, and land type, with the highest modulus observed in pedocal soils and the lowest in alpine soils.