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从冀鲁交界的大口河口向东至顺江沟为蜿蜒 １２０ｋｍ的粉沙淤泥质海岸。作者先后于 １９８７、 １９９２和２０００年对该海岸进行了多次实地考察，并应用８０年代至９０年代末以来的航空和卫星遥感等资料对其进行了综合分析。公元１１～１１２８年，黄河尾闾在此摆动人海，形成河口滩型海岸。１１２８年以后，黄河自此迁走，在海洋动力作用下，由河口滩型海岸逐渐演变成为典型的潮滩型海岸。该津段海岸发育了广阔平坦的、相带十分明显的潮滩地带。在潮滩上同时发育了岛链状贝壳堤、残留冲积岛和巨大的多级分叉贯通性的潮水沟网络，构成了独具特色的海岸地貌环境体系，即黄河三角洲潮滩海岸时空谱系中的古代黄河三角洲海岸。
From the Jikou junction of the mouth of the mouth to the east Shun Shun ditch for the winding silty silt coast of 120km. The author conducted several field trips to the coast in 1987, 1992 and 2000, and conducted a comprehensive analysis of the coast using satellite and satellite remote sensing data from the 1980s to the late 1990s. AD 11 ~ 1128, the Yellow River tail swing in the sea, forming estuarine beach coast. After 1128, the Yellow River moved away from it. Under the motive force of the sea, the estuarine beach gradually evolved into a typical tidal flat coast. The Tianjin section of the coast has developed a broad, flat belt with a very clear tidal flat. At the same time, a series of tidal ditches, residual alluvial islands and huge multistage bifurcation tidal channel network are developed on the tidal flat at the same time, forming a unique coastal landscape environmental system, namely the tidal flat in the Yellow River Delta Ancient Yellow River Delta coast.