Three profiles is chosen which located on peak ridge, side ridges and from peak ridge to central basin separately. Through granularity analysis of the sediment, we find its sedimental characters that sediment becomes thick from ridge to tidal creek.

• 分别在潮盆-潮沟系统的顶脊、侧脊及纵向取三个剖面，进行沉积物粒度分析，确定沉积特征，发现沉积物粒度自滩脊向潮沟逐渐变粗、分选变差，且顶脊的沉积物比侧脊和潮盆纵剖面要细，说明脊部的水动力条件较弱；