[1]TIAN Pei,WANG Zhe,YU Haijun,et al.Quantitative Evaluation of Spatiotemporal Pattern and Influencing Factors of Soil and Water Loss in Hilly Areas of Northwestern Hubei Province[J].Research of Soil and Water Conservation,2023,30(03):76-85.[doi:10.13869/j.cnki.rswc.2023.03.054]
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Quantitative Evaluation of Spatiotemporal Pattern and Influencing Factors of Soil and Water Loss in Hilly Areas of Northwestern Hubei Province
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
30
Number of periods:
2023 03
Page number:
76-85
Column:
Public date:
2023-04-10
- Title:
- Quantitative Evaluation of Spatiotemporal Pattern and Influencing Factors of Soil and Water Loss in Hilly Areas of Northwestern Hubei Province
- Keywords:
- soil erosion modulus; soil erosion factors; spatiotemporal distribution; runoff plot; RUSLE; Shiyan City
- CLC:
- S157.2
- DOI:
- 10.13869/j.cnki.rswc.2023.03.054
- Abstract:
- [Objective]Disclosesing the spatiotemporal pattern and influencing factors of soil erosion in Shiyan City plays an important guiding role in soil and water conservation and water quality protection of Danjiangkou Reservoir. [Methods] Based on the dynamic monitoring data of soil and water loss and long-term observation data of monitoring stations in Shiyan City from 2005 to 2020, the temporal and spatial variation characteristics of soil and water losses in Shiyan City were explored, and the main influencing factors were quantitatively evaluated by RUSLE model. [Results] Soil and water loss in Shiyan City was in the containment stage from 2005 to 2011 and in the relatively stable stage from 2012 to 2020. In 2020, the soil erosion in the central area of Shiyan City showed the characteristics of small area and high intensity. The three southern areas showed the characteristics of wide area and low intensity, while the northern area showed the characteristics of wide area and high intensity. For runoff plots with different land use types, the average soil erosion modulus of bare land plot was the highest 〔2 320 t/(km2·a)〕, followed by cultivated land, economic forest and grassland plot. The average soil erosion moduli of the three slope grades(0°～10°, 10°～20°, 20°～30°)were 616.73 t/(km2·a), 1 226.65 t/(km2·a ), 2 080.26 t/(km2·a), respectively, indicating that the soil erosion was seriously aggravated after the slope gradient exceeded 10°. Compared with the natural vegetation coverage area, the soil erosion rates of Amorpha fruticosa hedgerow and ridge terrace area were significantly reduced, and the soil and water conservation effect of Amorpha fruticosa hedgerow was better. There was a significant binary linear or exponential function relationship between soil erosion modulus and slope and erosive precipitation in different land use types. [Conclusion] Yunxi County and Yunyang District are the key areas of soil and water losses in Shiyan City. The land use type, slope, vegetation cover type and erosive precipitation are the important influencing factors on soil and water losses in this area. These research results can provide scientific basis for the optimal allocation of soil and water conservation measures and the construction of erosion model in northwest Hubei Province.
- References:
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Last Update:
2023-04-10