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现代长江口、黄河口水下三角洲地区的海底上发育有大量规模形态各异的不稳定性现象。其中沙波和浅埋的生物气体是长江口水下三角洲发育的主要形态 ,而滑坡和一些冲蚀结构则是黄河口水下三角洲的主要类型 ;它们在分布上也有较大的差异 ,长江水下三角洲主要呈垂直岸线分布 ,而在黄河水下三角洲则表现为平行岸线分布 ;分析认为这些现象与其河口的沉积环境和动力机制密切相关。
There are a large number of instability phenomena on the seabed of the Yangtze River estuary and the Yellow River mouth in the submarine delta region. Among them, sand waves and shallow buried biogas are the main forms of submarine deltaic development in the Changjiang Estuary, and landslides and some erosion structures are the main types of the Yellow River subaqueous delta. They also have great differences in distribution. The Yangtze River Delta It is mainly distributed in the vertical shoreline and parallel to the shoreline in the Yellow River sub-delta. It is concluded that these phenomena are closely related to the sedimentary environment and dynamics of the estuary.