Sea-level fluctuations in the fleet, an English tidal lagoon
Sea-level fluctuations in the fleet, an English tidal lagoon
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船队的海平面波动，英国潮汐泻湖
DOI：
10.1016/0272-7714(83)90077-x
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发表时间：
1983
影响因子：
2.8
通讯作者：
J. Longbottom
中科院分区：
文献类型：
--
作者：
I. Robinson;L. Warren;J. Longbottom
潮汐高程数据是沿着舰队长度的地方提供的，舰队是英格兰南海岸切西尔海滩后面的一个潮汐泻湖。数据的调和分析不能充分反映观测结果，特别是在环礁湖的内端。然而，对数据的仔细检查表明，能够根据长波在非常浅的水域中的非线性传播来理解潮汐制度。高、低潮行进速度不等造成的潮波变形和摩擦效应造成的平均水位的建立，是控制观测水位波动的重要物理机制。一个包含这些过程的一维数值模式能够令人满意地重现观测结果。虽然模型预测了风应力的强烈影响，但观测数据中的气象影响似乎主要是由于英吉利海峡的外部涌流通过其入口处传播到泻湖。
Tidal elevation data are presented for places along the length of the Fleet, which is a tidal lagoon behind Chesil Beach on the south coast of England. Harmonic analysis of the data is not able to represent the observations adequately, particularly at the inner end of the lagoon. However, careful inspection of the data shows that the tidal regime is capable of being understood in terms of the non-linear propagation of long waves in very shallow water. Distortion of the tidal wave by unequal progression speeds of high and low water, and the set-up of mean level by frictional effects, are shown to be the important physical mechanisms controlling the observed water level fluctuations. A one-dimensional numerical model which incorporates these processes is able to reproduce the observations satisfactorily. Whilst the model predicts strong effects of wind stress, the meteorological influences in the observed data appear to be largely due to external surges in the English Channel which propagate into the lagoon through its entrance.