本文具体讨论了上海淤泥质潮滩的潮锋作用过程,定性给出了潮锋的形成机制,认为潮锋作用及其水体高含沙量现象的本质在于“潮锋带水体水流加速效应”,即,由于潮滩坡面变化平缓的特殊性,涨潮水体前锋沿程存在着一持续时间可达数十分钟的水流加速过程.最后,本文初步探讨了潮锋作用在滩面塑造过程中的地位,并重新定义了潮锋作用的内容.

The existence of flood surge and high suspended sediment concentration in the flood surge zone has long been discerned,bur its significance in the development of tidal flat and its mechanism are not very clear yet.This Paper deals with the flood surge process over muddy tidal flat along the Shanghai Coast, proposes a qualitative model to explain the nature of the phenomenon of hign suspended sediment concentration in the flood surge zone and the mechanism of flood Surge whose intrinsic quality is that there exists a current accelerating effect which last scores of minutes along the tidal flat in flood surge zone,and discusses its importance to the development of muddy tidal flat along Shang coast Finally,a new definition of flood surge is put forward.