Sandwave and shallow buried gas are the main types on the Changjiang River sub aqueous delta, but on the Huanghe River subaqueous delta, they are landslide and erosioned textured bottom mainly.

• 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；