古代黄河三角洲海岸的现代特征──黄河三角洲潮滩时空谱系研究Ⅰ

Modern Characteristics of the Ancient Yellow River Delta Coast──Research on the Space-Time Lineage of the Yellow River Delta Tidal-Flat CoastⅠ

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。

The coastline zigzages for 120km from the Dakou River mouth at the juncture of Hebei and Shandong Provinces southwards to Shunjianggou. In 1 128 A.D., the lower reaches of the Yellow River oscillated here and emptied into the sea, thus resulting in a coast of estuarine beach type. After 1 128 A.D., the Yellow River moved away from here and, under the action of ocean dynamics, the estuarine beach type coast has gradually evolved into a typical tidal-flat coast. On this coastal section there developed a wide and smooth tidal flat, island-chain shaped shell dykes, residual alluvial islands, the dense dendritic tidal creeks and very obvious tidal-flat phase spread, thus constituting a unique coastal geomorphological environmental system, which is just the ancient yellow River delta coast in the space-time lineage of the Yellow River delta tidal flat coast. Recently, the authors made an on-the-spot investigation there and carried out a comprehensive analysis and study by applying the aerial remote-sensing data.