CAJ | 학술논문

七姊八妹列岛海域位于杭州湾南部的灰鳖洋内，除了岛礁周围局部存有深沟外，其余地区海床平缓．为了探究该海域海床演变情况，在了解杭州湾来水来沙特征基础上，分析了七姊八妹列岛海域的水动力、悬沙和底质分布特征．不同时期海图的对比分析表明，该海域近岸水深较小，人类活动频繁，围涂筑堤工程较多，一直处于淤积状态，属淤涨型岸滩，而离岸较远的海域，泥沙难于落淤而随潮反复搬运，基本处于冲淤平衡状态．1962～2008年这46 a间，七姊八妹列岛海域总体呈现与岸线走向一致的淤积、冲刷间隔分布的冲淤带．平均淤积厚度约2．2 m，淤积幅度约5．0 cm/a，大多数地方平均冲刷厚度约2．4 m，冲刷幅度约5．0 cm/a．这些特点与当地的水动力条件和泥沙沉积特性相一致．
칠자팔매렬도해역위우항주만남부적회별양내，제료도초주위국부존유심구외，기여지구해상평완．위료탐구해해역해상연변정황，재료해항주만래수래사특정기출상，분석료칠자팔매렬도해역적수동력、현사화저질분포특정．불동시기해도적대비분석표명，해해역근안수심교소，인류활동빈번，위도축제공정교다，일직처우어적상태，속어창형안탄，이리안교원적해역，니사난우락어이수조반복반운，기본처우충어평형상태．1962～2008년저46 a간，칠자팔매렬도해역총체정현여안선주향일치적어적、충쇄간격분포적충어대．평균어적후도약2．2 m，어적폭도약5．0 cm/a，대다수지방평균충쇄후도약2．4 m，충쇄폭도약5．0 cm/a．저사특점여당지적수동력조건화니사침적특성상일치．
Qizibamei Islands sea is located in Huibieyang sea of southern Hangzhou Bay.Most of the seabed is gen-tle,in addition to some deep holes around islands and reefs.In order to explore the seabed evolution of the sea are-a,based on the knowledge of water and sediment characteristics of Hangzhou Bay,the characteristics of hydrody-namic,suspended sediment and seabed material distribution are analyzed.Comparison study on charts from differ-ent periods shows that the offshore water is shallower because of human activities and engineering constructions, where it is in a state of deposition and of silting beach.The area far away from the shore is in a balancing state of scouring and silting because sediment is difficult to silting by the tidal movements.Between 1962~2008,Qizibam-ei Islands sea presents scouring and silting zone interval to coincide with the shoreline.The mean deposition thick-ness is about 2.2 m and deposition rate is about 5.0 cm/a.In most areas,the mean erosion thickness is about 2.4 m and erosion rate is about 5 .0 cm/a.These features are consistent with the local hydrodynamic conditions and sediment characteristics.