Wave erosion is the main erosion type in the water-level fluctuation zone (WLFZ) of the Three Gorges Reservoir Area (TGRA). Despite vegetation can effectively mitigate wave erosion in the WLFZ, its influence on the wave force and wave erosion remains unclear. Therefore, the wave experiments were conducted under 3 coverage rates (0, 30% and 60%) and 9 wave conditions (3 wave heights of 4, 6 and 8 cm combined with 3 wave periods of 1, 2 and 3 s) to analyse the wave force (expressed as the wave pressure on the slope surface and the pore water pressure in the slope) and wave erosion rate, and the factors influencing wave erosion were identified. The results indicated that the wave pressure, pore water pressure and wave erosion rate increased by 19.14%–104.75%, 16.84%–65.04% and 23.33%–91.64%, respectively, as wave height increases. The wave pressure decreased by 1.50%–31.23% followed by an increase by 22.05% to 87.10% with the increase of wave period, whereas the pore water pressure and wave erosion rate decreased by 28.33%–53.59% and 20.46%–63.59%, respectively. However, these quantities decreased by 2.10%–50.84%, 17.06%–40.23% and 17.28%–82.18%, respectively, with the increase of coverage rate. It was also discovered that the pore water pressure and coverage rate attained the highest positive and negative correlation coefficients with the wave erosion rate, respectively. In addition, pore water pressure accumulation is the most critical influence factor on wave erosion, and could effectively reduce the pore water pressure via its roots, thus improving the slope wave erosion resistance. This study could be useful to understand the mechanism of plants on controlling wave erosion and could provide a scientific reference for wave erosion control and the ecological construction in the WLFZ.

中文翻译：

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狗牙根对三峡库区水位升降带波浪力和波浪侵蚀的影响评价

波浪侵蚀是三峡库区水位升降区(WLFZ)的主要侵蚀类型。尽管植被可以有效缓解WLFZ的波浪侵蚀，但其对波浪力和波浪侵蚀的影响仍不清楚。因此，在3种覆盖率（0、30%和60%）和9种波浪条件（4、6和8 cm的3种波高结合1、2和3 s的3种波周期）下进行波浪实验来分析确定了波浪力（表示为坡面波浪压力和坡内孔隙水压力）和波浪侵蚀速率，以及影响波浪侵蚀的因素。结果表明，随着波高的增加，波浪压力、孔隙水压力和波浪侵蚀率分别增加19.14%~104.75%、16.84%~65.04%和23.33%~91.64%。随着波浪周期的增加，波浪压力先降低1.50%~31.23%，随后增加22.05%~87.10%，而孔隙水压力和波浪侵蚀率分别降低28.33%~53.59%和20.46%~63.59%，分别。但随着覆盖率的增加，这些数量分别减少了2.10%~50.84%、17.06%~40.23%和17.28%~82.18%。研究还发现，孔隙水压力和覆盖率分别与波浪侵蚀率具有最高的正相关系数和负相关系数。此外，孔隙水压力积累是波浪侵蚀最关键的影响因素，可以有效地通过根部降低孔隙水压力，从而提高边坡的抗波浪侵蚀能力。该研究有助于了解植物控制波浪侵蚀的机制，为无浪无浪区波浪侵蚀控制和生态建设提供科学参考。