Wind erosion and dust emission in the core area of Hexi Corridor-Taklimakan Desert edge in 2000-2023
This study utilizes the Wind Erosion Prediction System(WEPS)algorithm,combined with multi-source geographical data,to calculate soil wind erosion and PM10 in the core area of the battle against desertifica-tion along the Hexi Corridor-Taklimakan Desert edge since 2000.It analyzes the spatiotemporal variation charac-teristics and primary influencing factors.The results indicate that within the total study area of 806 700 km2,the multi-year average wind erosion modulus is 3 553 t·km-2,with high wind erosion concentrations observed in the southeastern margin of the Taklamakan Desert and the central Hexi Corridor.Overall,due to decreasing wind speeds,increasing vegetation cover,and increased precipitation in the study area,the wind erosion modulus ex-hibits a downward trend,with an average decrease rate of 41 t·km-2 per decade,and the area experiencing reduc-tion accounts for 48％of the total.Meanwhile,the annual average PM10 emission is 3.1 1×107t,with an average annual rate of 38.53 t·km-2.Among the seasons,spring exhibits the highest wind erosion modulus,accounting for 47％of the annual total.Correlation analysis reveals that wind speed,vegetation cover,and soil moisture are key influencing factors,with wind speed contributing over 90％to wind erosion.
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