In plain part, submarine distributary channels of meandering deltaic plain have complicated branches and crevasse history which are inter-related.Mouth bar is not well preserved.

• 曲流河三角洲平原的分流河道具有复杂分支与决口历史，因此常呈交织状，受分流河道冲蚀作用的影响，河口坝不发育。