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Soil resistance to flowing water erosion as affected by tea planting age in Three Gorges Reservoir Area of China

Author

Listed:
  • Guanhua Zhang

    (Changjiang River Scientific Research Institute, Changjiang Water Resources Commission, Wuhan, P.R. China
    Research Center on Mountain Torrent & Geologic Disaster Prevention of Ministry of Water Resources, Wuhan, P.R. China)

  • Wenjun Yang
  • Jiajun Hu

    (Changjiang Water Resources Commission of the Ministry of Water Resources, Wuhan, P.R. China)

  • Jigen Liu

    (Changjiang River Scientific Research Institute, Changjiang Water Resources Commission, Wuhan, P.R. China
    Research Center on Mountain Torrent & Geologic Disaster Prevention of Ministry of Water Resources, Wuhan, P.R. China)

  • Wenfeng Ding

    (Changjiang River Scientific Research Institute, Changjiang Water Resources Commission, Wuhan, P.R. China
    Research Center on Mountain Torrent & Geologic Disaster Prevention of Ministry of Water Resources, Wuhan, P.R. China)

  • Hai Xiao

    (College of Civil Engineering & Architecture, China Three Gorges University, Yichang, P.R. China)

Abstract

Soil erosion resistance is influenced by intrinsic soil properties and multiple external factors. This study investigated the effect of tea planting age on soil resistance to flowing water erosion (reflected by rill erodibility (Kr) and critical shear stress (τc)) in Three Gorges Reservoir Area. One slope farmland (as the control) and five tea plantations cultivated for 3 to 34 years were selected for sampling sites. The results indicated that bulk density (BD), soil cohesion (Coh), water stable aggregate (WSA), mean weight diameter (MWD), soil organic carbon (SOC), litter density (LD), and root mass density (RMD) increased generally with tea planting age. Compared to the control, Kr of tea plantations reduced by 71.1%-85.3%. The temporal variation in soil erosion resistance was controlled greatly by the variations in most near-surface characteristics. Kr decreased with WSA, Coh, LD, RMD, and SOC following a power function (P < 0.01); τc increased with MWD, LD, RMD, and SOC as an exponential function, with BD a power function, and Coh a logarithmic function (P < 0.01). In this study, Kr could be simulated well by WSA and LD with a power function, and τc could be simulated well by MWD and RMD with an exponential function.

Suggested Citation

  • Guanhua Zhang & Wenjun Yang & Jiajun Hu & Jigen Liu & Wenfeng Ding & Hai Xiao, 2023. "Soil resistance to flowing water erosion as affected by tea planting age in Three Gorges Reservoir Area of China," Soil and Water Research, Czech Academy of Agricultural Sciences, vol. 18(2), pages 116-127.
    • Handle: RePEc:caa:jnlswr:v:18:y:2023:i:2:id:157-2022-swr
    DOI: 10.17221/157/2022-SWR
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