作　　者： ; ; ;

机构地区： 河海大学

出　　处： 《台湾海峡》 2007年第1期1-6,共6页

摘　　要： 结合华南弧形海岸的平衡与稳定特征,利用Gis和Envi软件对不同年份的海图进行数字化、等深线变化和海床冲淤计算对比.结果表明博贺沙坝-潟湖海岸近岸线处为相对淤积的动态平衡状态,近岸带海床相对稳定、海床冲淤幅度不大.但由于当前海面趋于上升、陆架泥沙来源减少以及近岸波浪等动力作用可能加强,近岸海床将出现由淤转冲的趋势. Based on the types of stability and equilibrium of arc-shaped coast in South China, digitial process, changes in different isobaths and calculation of scouring and silting in different sea maps were analyzed by seftwares Gis and Envi. The results suggested that dynamic accreted equilibrium state exist near the area of waterline in Bohe bar-lagoon coast, where the changes of scouring and sil- ting of the nearshore zone was weak and the sea-floor in this study area had a relatively stable state. However, the trends from silting to scouring should occur because of the increased trend of present sea-level, decreased sediment source from the continent and the strengthened actions such as wave and tidal occurring along the nearshore zone.

关 键 词： 海洋地质 沙坝 澙湖海岸 近岸海床 稳定状态 粤西博贺

领　　域： [天文地球] [天文地球]