[1]ZHANG Yan,SHI Feihang,ZHANG Yue,et al.Temporal and Spatial Changes and Driving Factors of Soil Erosion in the Middle Reaches of the Yellow River[J].Research of Soil and Water Conservation,2023,30(05):1-12.[doi:10.13869/j.cnki.rswc.2023.05.003.]
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Temporal and Spatial Changes and Driving Factors of Soil Erosion in the Middle Reaches of the Yellow River
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
30
Number of periods:
2023 05
Page number:
1-12
Column:
Public date:
2023-08-10
- Title:
- Temporal and Spatial Changes and Driving Factors of Soil Erosion in the Middle Reaches of the Yellow River
- Keywords:
- soil erosion; RUSEL model; geographic detector; temporal and spatial variation; middle reaches of the Yellow River
- CLC:
- S157
- DOI:
- 10.13869/j.cnki.rswc.2023.05.003.
- Abstract:
- [Objective] In order to provide a reference for the thorough control of watershed soil erosion and the improvement of ecological environment quality in the Loess Plateau region, the effects of ecological engineering measures and natural factors on soil erosion evolution were revealed, and the inhibition degrees of engineering factors and hydrological factors on soil erosion were quantified. [Methods] Based on the rainfall data of 77 meteorological stations in the middle reaches of the Yellow River, land use types, vegetation coverage, digital elevation model, soil texture and other data of four periods in the basin, the RUSEL model and geographic detector method were used to study the spatiotemporal changes and driving factors of soil erosion by extracting precipitation, topography, climate, soil and land use in the basin. [Results] The largest reduction in sediment erosion in the Yellow River's middle sections between 2000 and 2010 was observed. Soil loss significantly reduced due to ecological engineering at altitudes between 1 000 and 1 500 m, at slope gradients between 8° and 15°, and on hillsides that were both semi-shaded and semi-sunny. The capacity of soil and water loss control decreased in the order: forestland>grassland>cultivated land, and the erosion area changed most dramatically in the range of 30%～50% vegetation coverage, which was the key restoration and reconstruction area of the project of converting farmland to forest. In the middle reaches of the Yellow River, rainfall increased gradually from northwest to southeast over the years, and the spatial vertical difference changes under the influence of topography, and the interannual fluctuation increased insignificantly, which had the potential to aggravate soil erosion. Vegetation coverage increased linearly, and its increment increased from northwest to southeast. Vegetation coverage was the main controlling factor affecting soil erosion. In the middle Yellow River, the interaction between vegetation coverage and the slope was the strongest, and the synergistic effects of vegetation coverage, slope and other factors could significantly enhance the force on soil erosion pattern evolution. [Conclusion] In the middle reaches of the Yellow River, the land use pattern was dominated by agriculture and animal husbandry for a long time, and the cultivated land with steep slopes flowed continuously to the forest and grassland with high topographic adaptability and elasticity over the years, reflecting that the core part of the national farmland conversion project is to convert sloping land into forest and grassland. The ecological engineering mainly characterized by vegetation cover change dominated the process and degree of soil erosion reduction in the middle Yellow River, and the driving force of the interaction of any two factors was greater than that of a single factor.
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Last Update:
2023-08-10