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Study on the Sand Reduction Effect of Slope Vegetation Combination in Loess Areas

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  • Fucui Wang

    (School of Civil Engineering, Lanzhou Jiaotong University, Anning District, Lanzhou 730070, China)

  • Hu Tao

    (School of Civil Engineering, Lanzhou Jiaotong University, Anning District, Lanzhou 730070, China)

  • Xi Shi

    (School of Civil Engineering, Lanzhou Jiaotong University, Anning District, Lanzhou 730070, China)

  • Shilong Bu

    (School of Civil Engineering, Lanzhou Jiaotong University, Anning District, Lanzhou 730070, China)

  • Ziming Bao

    (School of Civil Engineering, Lanzhou Jiaotong University, Anning District, Lanzhou 730070, China)

  • Dezhi Zhang

    (School of Civil Engineering, Lanzhou Jiaotong University, Anning District, Lanzhou 730070, China)

Abstract

Slope erosion in the Loess Plateau region has long been a concern, and vegetation plays an important role in slowing down erosion and controlling sedimentation. However, a single vegetation model shows some limitations when facing complex natural conditions and variable rainfall events. Therefore, this study investigated the influence mechanism of vegetation configuration on slope sand production at different slopes through theoretical analyses and indoor experiments. The results of the study showed that certain factors, such as vegetation configuration mode, flow rate, runoff power, runoff velocity, and runoff shear, are closely related to slope runoff sand production. The specific findings are as follows: (1) Under the condition of slope gradient of 2°, the sand reduction effect of the rigid–flexible single-row staggered configuration is the most significant, and the sediment production is reduced by 29.89%. (2) With the increase in the slope gradient and flow rate, the sand production on the slope surface rises significantly, and when the slope gradient is increased from 2° to 6°, the average sand production is increased from 1.43 kg to 2.51 kg.(3) The erosion reduction effects of different vegetation configurations were in the order of rigid–flexible single-row staggered combination > flexible vegetation single combination > rigid–flexible double-row staggered combination > rigid vegetation single combination > upstream rigid downstream flexible combination > bare slope. This study provides a theoretical basis for optimizing the vegetation configuration for effective sand reduction and provides an important reference for the sustainable development of the Yellow River Basin.

Suggested Citation

  • Fucui Wang & Hu Tao & Xi Shi & Shilong Bu & Ziming Bao & Dezhi Zhang, 2024. "Study on the Sand Reduction Effect of Slope Vegetation Combination in Loess Areas," Sustainability, MDPI, vol. 16(20), pages 1-19, October.
    • Handle: RePEc:gam:jsusta:v:16:y:2024:i:20:p:9132-:d:1503464
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    References listed on IDEAS

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    1. Xia Zhang & Guo Yu & Zhan Li & Peng Li, 2014. "Experimental Study on Slope Runoff, Erosion and Sediment under Different Vegetation Types," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 28(9), pages 2415-2433, July.
    2. Qian Xu & Qingtao Lin & Faqi Wu, 2024. "Comparative Study of the Impacts of Maize and Soybean on Soil and Water Conservation Benefits during Different Growth Stages in the Loess Plateau Region," Land, MDPI, vol. 13(8), pages 1-22, August.
    3. Yifan Zhang & Qinghe Zhao & Zihao Cao & Shengyan Ding, 2019. "Inhibiting Effects of Vegetation on the Characteristics of Runoff and Sediment Yield on Riparian Slope along the Lower Yellow River," Sustainability, MDPI, vol. 11(13), pages 1-16, July.
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