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Characteristics of Runoff and Sediment Yield in a Simulated Hedgerow–Grass Ditch System in Sloping Lands with Regosols

Author

Listed:
  • Lan Song

    (College of Resources and Environment, Southwest University, Tiansheng Road, Beibei District, Chongqing 400715, China
    These authors contributed equally to this work.)

  • Yunfei Bi

    (College of Resources and Environment, Southwest University, Tiansheng Road, Beibei District, Chongqing 400715, China
    These authors contributed equally to this work.)

  • Qingsong Bo

    (College of Resources and Environment, Southwest University, Tiansheng Road, Beibei District, Chongqing 400715, China)

  • Tianyang Li

    (College of Resources and Environment, Southwest University, Tiansheng Road, Beibei District, Chongqing 400715, China)

  • Yonghao Li

    (College of Resources and Environment, Southwest University, Tiansheng Road, Beibei District, Chongqing 400715, China)

  • Binghui He

    (College of Resources and Environment, Southwest University, Tiansheng Road, Beibei District, Chongqing 400715, China)

  • Xinmei Zhao

    (College of Resources and Environment, Southwest University, Tiansheng Road, Beibei District, Chongqing 400715, China)

Abstract

The independent effects of hedgerow or grass ditches on the migration of runoff, sediment and nutrients are well known; however, the effects of combined hedgerow–grass ditch systems have rarely been assessed. Vegetation stem diameter (VSD) is an essential variable that changes the effectiveness of a hedgerow–grass ditch system in reducing runoff and sediment yield on sloping lands. A hedgerow–grass ditch system was simulated to interpret the effects of varied VSDs [i.e., 0 (control), 0.1, 0.2, 0.4 and 0.8 cm] in hedgerow on runoff and sediment yield by laboratory rainfall simulation. Compared to the control, the time to runoff initiation presented a 43.3% delay in 0.8 cm VSD ( p < 0.05), and the runoff rate was significantly reduced by 16.6% in the 0.2 cm VSD and by 17.0% in the 0.8 cm VSD, respectively ( p < 0.05). The sediment yield rate decreased by 74.2% and 85.8% relative to that of the control, respectively ( p < 0.05). The reduction was 5.3–17.0% for the runoff rate and 3.5–85.8% for the sediment yield rate with varied VSDs relative to the control. The sediment yield rate decreased remarkably as an exponential function with increased stem diameter ( p < 0.05). Our results have great significance for creating strategies for soil and water conservation on sloping lands.

Suggested Citation

  • Lan Song & Yunfei Bi & Qingsong Bo & Tianyang Li & Yonghao Li & Binghui He & Xinmei Zhao, 2024. "Characteristics of Runoff and Sediment Yield in a Simulated Hedgerow–Grass Ditch System in Sloping Lands with Regosols," Land, MDPI, vol. 13(8), pages 1-14, August.
    • Handle: RePEc:gam:jlands:v:13:y:2024:i:8:p:1231-:d:1452081
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    References listed on IDEAS

    as
    1. Li, Xiaona & Zhang, Weiwei & Zhao, Chunqiao & Li, Hongjie & Shi, Ruishuang, 2020. "Nitrogen interception and fate in vegetated ditches using the isotope tracer method: A simulation study in northern China," Agricultural Water Management, Elsevier, vol. 228(C).
    2. Sun, Liquan & Zhang, Biao & Yin, Ziming & Guo, Huili & Siddique, Kadambot H.M. & Wu, Shufang & Yang, Jiangtao, 2022. "Assessing the performance of conservation measures for controlling slope runoff and erosion using field scouring experiments," Agricultural Water Management, Elsevier, vol. 259(C).
    3. Shi, Peng & Li, Peng & Li, Zhanbin & Sun, Jingmei & Wang, Dejun & Min, Zhiqiang, 2022. "Effects of grass vegetation coverage and position on runoff and sediment yields on the slope of Loess Plateau, China," Agricultural Water Management, Elsevier, vol. 259(C).
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