海底沉积物运动可由重力作用引起,它常以水下滑坡的形式出现,对高含水量的细颗粒物质尤其是如此(林振宏等,1990);在陆架和陆坡区,水下滑坡可由于地震等事件而诱发。此外,海底稳定性还与水流作用引起的沉积物运动有关,沉积物输运造成相应的堆积和冲刷,从而改变海底的形态。在许多环境中,沉积物输运是控制海底稳定性的主要因素。海底某处高程在一定时段内的变化系由活动层厚度、冲淤量和底部地貌形 Seabed sediment movement can be caused by gravity, which often occurs as a subsurface landslide, especially for high-moisture fine-grained materials (Lin et al., 1990). In continental shelf and slope areas, underwater landslides can occur due to earthquakes Event induced. In addition, the stability of the seabed is also related to the sediment movement caused by water flow, and the sediment transport causes corresponding accumulation and erosion, thus changing the shape of the seafloor. In many environments, sediment transport is a major factor in controlling seafloor stability. The elevation of sea floor somewhere in a certain period of change is determined by the active layer thickness, scour and silting and the bottom of the topography