Annual Variations of Tide Level and Mudflat Profile
Annual Variations of Tide Level and Mudflat Profile
复制标题
潮位和滩涂剖面的年变化
DOI：
10.1061/(asce)0733-950x(2004)130:3(119
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
N. Kobayashi
中科院分区：
文献类型：
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作者：
F. Yamada;N. Kobayashi
在河口附近，沿着超过1000米的两条跨岸线每月测量泥滩剖面，为期两年。所有被测量的轮廓都显示在平均误差为3cm的二次轮廓中，其中三个参数随时间变化。以二次凸度、平均坡度和垂直位移为代表的二次剖面的时间变化与场址附近的潮位和幅度、有效波高、风速和河流流量等资料相关。垂直位移随年潮位变化呈阶段性变化，但泥滩位移仅为年潮位位移的20%。随着每年潮水的涨落，泥滩的坡度变得平缓或陡峭。所提出的二次剖面方法可能对检查其他地点的潮间带泥滩形态有用。
Mudflat profiles were measured monthly along two cross-shore lines exceeding 1,000 m in the vicinity of a river mouth for 2 years. All the measured profiles are shown to be approximated within average errors of 3 cm by a quadratic profile with three parameters that vary with time. The temporal variations of the quadratic profile represented by the quadratic convexity, mean slope, and vertical displacement are correlated with available data on the tide level and range, significant wave height, wind speed, and river discharge in the vicinity of the field site. The vertical displacement varied in phase with the annual tide level variation of 40 cm, but the mudflat displacement was only 20% of the tide level displacement. The mudflat slope became gentler or steeper as the tide level rose or fell annually. The proposed quadratic profile approach may be useful in examining intertidal mudflat morphology at other sites.