Like Tsunamis, Tides Make Rivers Deeper
A river meeting an ocean - How far upriver is tidal motion felt? Layman’s physics: a positive disturbance penetrates farther. Two plus one explanations for the backwater due to wave forcing. River stage rise/fall without wave motion in upriver areas owing to a tsunami intrusion or the spring-neap tidal cycle. Approach to calculating the tidal set-up height. Tidal wave set-up in Yoshida (Japan) and Columbia (USA) rivers. More than a harmonic constituent.
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