Submarine canyons can transport large volumes of terrigenous material from the continent to the deep-sea environment and are the primary conduits of source-to-sink systems. The large-scale morphologic features of canyons have been well studied using seismic reflection and the bathymetry data. However, detailed analyses of the small-scale elements of canyon morphology are relatively few because of the limited resolution of traditional field investigations. In this paper, the multi-scaled geomorphology of a bended submarine canyon (canyon C4) located in Wanhu Seamount region (northern South China Sea) is described and discussed based on the in-situ high-definition video data, high-precision near-bottom acoustic data, and push-cores obtained using the manned submersible vehicle. The NNW-trending submarine canyon diverted to 122.5° at the foot of Wanhu Seamount, and the fresh erosional surfaces were recorded using the video data at the canyon axis bend. A total of eight sediment waves were generated at the overbank of the bending region. These waves contain wavelengths and wave heights decreasing in an upslope direction from the canyon axis towards the Wanhu Seamount. The C-M pattern (coarsest one percentile grain size versus median grain size values), grain cumulative probability curves, and grain size gradations derived from the sediment cores suggested that these sediment waves were induced by a turbidity current. The bending of the canyon resulted from the deflection and reflection of the turbidity currents, which were constrained by Wanhu Seamount. The abnormal geomorphologies of some sediment waves were related to the back-squeezed underflow of the turbidity currents. The turbidity current behavior was compared and found to be in agreement with the experimental and modeling simulation results mentioned in the literature. However, the morphologic setting in the natural case was more complex than that observed from the experiments, with the flow behaviors being more complicated. Future studies are required for more detailed comparison between the natural case and simulations to better understand the turbidity current behavior in a bended submarine canyon.

海底峡谷可以将大量陆源物质从大陆运输到深海环境，是源汇系统的主要渠道。利用地震反射和测深数据对峡谷的大尺度形态特征进行了很好的研究。然而，由于传统实地调查的分辨率有限，对峡谷形态的小尺度元素的详细分析相对较少。本文基于原位高清视频数据、高精度近地观测数据，描述和讨论了位于万湖海山地区（南海北部）的弯曲海底峡谷（峡谷C4）的多尺度地貌特征。底部声学数据，以及使用载人潜水器获得的推芯。NNW 趋势的潜艇峡谷转向 122。万湖海山脚下5°，利用峡谷轴弯处的视频数据记录了新鲜的侵蚀面。在弯曲区的上岸共产生了 8 次沉积波。这些波包含从峡谷轴向万湖海山上坡方向递减的波长和波高。CM 模式（最粗的 1% 粒度与中值粒度值）、颗粒累积概率曲线和来自沉积物核心的粒度级表明这些沉积波是由浊流引起的。峡谷的弯曲是由于万湖海山对浊流的偏转和反射造成的。一些沉积波的异常地貌与浊流的反挤压底流有关。对浊流行为进行了比较，发现与文献中提到的实验和建模模拟结果一致。然而，自然情况下的形态设置比从实验中观察到的更复杂，流动行为更复杂。未来的研究需要对自然情况和模拟进行更详细的比较，以更好地了解弯曲海底峡谷中的浊流行为。自然情况下的形态设置比从实验中观察到的更复杂，流动行为更复杂。未来的研究需要对自然情况和模拟进行更详细的比较，以更好地了解弯曲海底峡谷中的浊流行为。自然情况下的形态设置比从实验中观察到的更复杂，流动行为更复杂。未来的研究需要对自然情况和模拟进行更详细的比较，以更好地了解弯曲海底峡谷中的浊流行为。