南黄海辐射状沙脊成因研究的新进展

NEW DEVELOPMENT OF STUDIES ON ORIGIN OF RADIATING SAND RIDGES IN THE SOUTH YELLOW SEA

南黄海辐射状沙脊位于现代长江三角洲以北、旧黄河三角洲以南的苏北岸外浅海区，大致以港为顶点向海呈辐射状分布，其规模巨大，形态特殊，且具北大南小的明显不对称格架，在国内外罕见。我国学者对其接触始于５０年代末６０年代初的全国海岸带普查。由于该区脊槽多变，...

By making use of 2 D tidal mathematical model and ADI method,the author calculated M 2 tides and tidal currents of the Bohai Sea,Yellow Sea and East China Sea at 7 000 aB.P., 6 000 aB.P., 3 800 aB.P.,the 8th century and the 11th century and also in the condition of modern coastal line.The calculation results show that when the Yangtze River mouth was an eatuary during 7 000 aB.P., 6 000 aB.P.and 3 800 aB.P.,north of the centerline of the estuary had a radiating tidal field similar to the tidal field of the modern South Yellow Sea.And the modern tidal field in the radiating sand ridge area began from 10 000 aB.P.,experienced the maximum transgression and still remains stable now.