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<p>The dual role of trees in affecting slope stability during cyclones is complex and remains underexplored. This study investigates how tree roots can both stabilize slopes through mechanical reinforcement and destabilize them by facilitating rapid infiltration. We examine 95 cyclone-induced landslides and conduct a series of field surveys, laboratory tests, and dye tracer experiments on slopes covered by <i>Pinus massoniana</i>. Results show that tree roots significantly increase soil porosity and permeability, creating preferential flow paths that enhance subsurface moisture during storms. At the same time, root reinforcement provides additional cohesion to the shallow soil layer. However, the combined effects of wind loading and concentrated infiltration in the rooted area contribute to failure surfaces at the maximum rooting depth and the bedrock-soil interface. These findings highlight the importance of incorporating both the stabilizing and destabilizing effects of trees into landslide risk assessments under cyclonic conditions.</p>

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How trees influence slope stability during cyclones: field and experimental evidence

  • 期刊论文

  • 发表日期：

    2026年2月20日

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  • Yu Zhuang,
  • Aiguo Xing,
  • Qiang Sun,
  • Xueyong Xu,
  • Ye Zhou,
  • Haoshan Zhang

摘要

The dual role of trees in affecting slope stability during cyclones is complex and remains underexplored. This study investigates how tree roots can both stabilize slopes through mechanical reinforcement and destabilize them by facilitating rapid infiltration. We examine 95 cyclone-induced landslides and conduct a series of field surveys, laboratory tests, and dye tracer experiments on slopes covered by Pinus massoniana. Results show that tree roots significantly increase soil porosity and permeability, creating preferential flow paths that enhance subsurface moisture during storms. At the same time, root reinforcement provides additional cohesion to the shallow soil layer. However, the combined effects of wind loading and concentrated infiltration in the rooted area contribute to failure surfaces at the maximum rooting depth and the bedrock-soil interface. These findings highlight the importance of incorporating both the stabilizing and destabilizing effects of trees into landslide risk assessments under cyclonic conditions.