摘要
作者利用经验正交函数(EOF)方法分析了南汇南滩近期冲淤特征,表现为随着时间推移在空间上纵向与横向的两种波动。纵向上,南汇南滩的冲淤波动以类似行进波的形式向西传播,速率约为820m/a,波动幅度沿程递减;横向上,以水下斜坡和海床的衔拉部位为节点,整个剖面以类似驻波的形式上下振动,节点上下出现相反的冲淤趋势,即上冲下淤或上淤下冲。水下斜坡带冲淤幅度最大,滩地和海床相对要小。
Using empirical orthogonal function (EOF) method, this paper discusses the characteristics of topography change on Nanhui Nan Shoal. It is concluded as follows: First, erosion or deposition occurs sequentially from east to west alongshore. Second, there is an equilibrium node at the transitional part between submarine slope and seabed. Shoal profile change to the upside of the node is oppsite to the downside, i.e. the upside eroded while the downside deposited, and vice versa. The elevation change is very large on submarine slope, but it is relatively small on tidal flat and on seabed.
出处
《华东师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2003年第3期49-55,共7页
Journal of East China Normal University(Natural Science)
基金
上海市科委基金(99ZA14008)
上海市重点学科资助
关键词
EOF
岸滩冲淤
剖面变化
EOF
coastal erosion and deposition
profile change
