Abstract

Transmitted waves due to overtopping and due to waves which pass under the caisson in a discharge flume is sometimes a problem for stable operation of pumping works. The currents make influence on not only the transmitted waves but also the incident waves. The phenomena, therefore, might be quite complicated. To understand the phenomena, the hydraulic model tests were carried out. The transmitted waves due to overtopping in the currents sometime quite larger than the transmitted waves without currents. To simulates the transmitted waves, a new methods is proposed. The methods are based on the Bousinesque equation. The mechanism of the flow under and over the caisson are modelized by a simple pipe flow and non-linear long wave equations. The method is quite capable to represent experimental results.

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