洋山港堵汊工程对邻近海底冲淤影响分析  

Primary analysis on the erosion-accretion change of the seabed around Yangshan Harbor before and after the plugging offshoot project

作　　者：杜景龙[1] 杨世伦[2] 贺松林[2] 郜昂[2] 徐晓君[2] 张军宏[2] 

机构地区：[1]苏州科技学院城市与环境学系,江苏苏州215011 [2]华东师范大学河口海岸学国家重点实验室,上海200062

出　　处：《海洋工程》2008年第4期53-59,共7页The Ocean Engineering

基　　金：上海市科委重大基金资助项目(07DJ14003-01);国家海洋公益性项目(200705020);国家自然科学基金项目(40076027)

摘　　要：根据大比例尺地形测量数据,采用GIS技术对洋山港堵汊工程前后周边海底冲淤变化进行了初步分析。结果表明:工程建设前(1998～2004年),洋山港域的冲蚀速率大于外围海域。工程建设后的2004和2005年,洋山港域的平均刷深幅度明显小于外围海域;2005和2006年,洋山港域出现显著淤积(平均淤厚度0.29 m),而外围海域仍维持冲蚀状态。主要原因为建港期间的系列堵汊工程在一定程度上削弱了港域内的动力条件,导致冲蚀减弱并出现一定的淤积。This paper analyses the erosion-accretion change before and after the plugging offshoot project at Yangshan Harbor. To do this work, large scale topographic maps were used and GIS was adopted. The results show： before the project （1998 - 2004）, the erosion of the sea area within Yangshan Harbor is stronger than that of the periphery around the harbor. After the project, the average depth of erosion within Yang- shan Harbor was evidently less than that of the periphery between 2004 and 2005. It turned to accumulate at the sea area within Yangshan Harbor between 2005 and 2006, with the seabed filled up 0.29 m averagely. At the same period, the periphery around the harbor maintained ero- sion. The conclusion is： a series of the plugging offshoot project during the period of harbor construction had weakened the dynamic condition of the sea area within Yangshan Harbor to a certain extent, which made the erosion weak and some accretion present.

关 键 词：洋山港 堵汊工程 冲淤 GIS 杭州湾 

分 类 号：P736.21[天文地球—海洋地质]