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Analysis of Runoff and Sediment Losses from a Sloped Roadbed under Variable Rainfall Intensities and Vegetation Conditions

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  • Chunfeng Jia

    (School of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China
    Shanxi Environmental Protection Institute of Transport (Co., LTD.), Taiyuan 030006, China)

  • Baoping Sun

    (School of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China)

  • Xinxiao Yu

    (School of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China)

  • Xiaohui Yang

    (Chinese Academy of Forestry, Beijing 100864, China)

Abstract

Vegetation plays an important role in reducing soil erosion. By exploring the allocation and coverage of different types of vegetation, we can improve management practices that can significantly reduce soil erosion. In this experiment, we study runoff and sediment losses on a shrub-grass planted, grass planted, and bare slope under different rainfall intensities. Results showed that the runoff generation time for the three subgrade types decreased as rainfall intensity increased ( p < 0.05). The slopes planted with either grass or shrub-grass were able to effectively delay runoff generation. As rainfall intensity increased, the runoff amount increased for all treatments, with runoff in the bare slope increasing the most. The runoff reduction rate from the shrub-grass slope ranged from 54.20% to 63.68%, while the reduction rate from the slope only planted with grass ranged from 38.59% to 55.37%. The sediment yield from the bare slope increased from 662.66 g/m 2 (15 mm/h) to 2002.95 g/m 2 (82 mm/h) with increasing rainfall intensity in the plot. When compared with the bare slope, both the shrub-grass and planted grass slopes were able to retain an additional 0.9 g/m 2 to 4.9 g/m 2 of sediment, respectively. An accurate relationship between rainfall intensity, sloped vegetation types, and runoff reduction rate was obtained by regression analysis and validated. These results can provide a reference for improving soil and water conservation via improved vegetation allocation on a sloped roadbed.

Suggested Citation

  • Chunfeng Jia & Baoping Sun & Xinxiao Yu & Xiaohui Yang, 2020. "Analysis of Runoff and Sediment Losses from a Sloped Roadbed under Variable Rainfall Intensities and Vegetation Conditions," Sustainability, MDPI, vol. 12(5), pages 1-11, March.
    • Handle: RePEc:gam:jsusta:v:12:y:2020:i:5:p:2077-:d:329943
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    References listed on IDEAS

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    1. Chunfeng Jia & Bao-ping Sun & Xinxiao Yu & Xiaohui Yang, 2019. "Evaluation of Vegetation Restoration along an Expressway in a Cold, Arid, and Desertified Area of China," Sustainability, MDPI, vol. 11(8), pages 1-13, April.
    2. Truman, C.C. & Potter, T.L. & Nuti, R.C. & Franklin, D.H. & Bosch, D.D., 2011. "Antecedent water content effects on runoff and sediment yields from two Coastal Plain Ultisols," Agricultural Water Management, Elsevier, vol. 98(8), pages 1189-1196, May.
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    Cited by:

    1. Hao Gou & Jin Liao & Fan Du & Changliang Tang & Yali Lin & Dingjuan Li & Yulei Zhang & Yangyang Ning & Zihui Ye & Zheyao Xu & Cuiying Zhou & Zhen Liu, 2022. "Soil Remediation of Subtropical Garden Grasses and Shrubs Using High-Performance Ester Materials," Sustainability, MDPI, vol. 14(6), pages 1-18, March.
    2. Xiaochun Qin & Anchen Ni & Dongxiao Yang & Bing Chen & Shiliang Liu, 2023. "Exploring Applicability of Different Ecological Protection Measures for Soil and Water Loss Control of Highway Slope in the Permafrost Area: A Case Study of Qinghai-Tibet Highway in China," IJERPH, MDPI, vol. 20(6), pages 1-19, March.
    3. Xiao-chun Qin & An-chen Ni & Nan Zhang & Zheng-hao Chen, 2021. "Erosion Control and Growth Promotion of W-OH Material on Red Clay Highway Slopes: A Case Study in South China," Sustainability, MDPI, vol. 13(3), pages 1-16, January.
    4. Hariklia D. Skilodimou & George D. Bathrellos, 2021. "Natural and Technological Hazards in Urban Areas: Assessment, Planning and Solutions," Sustainability, MDPI, vol. 13(15), pages 1-5, July.

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