A THEORETICAL AND EXPERIMENTAL STUDY OF UNDERTOW

J. Buhr Hansen, I.A. Svendsen

Abstract


It is well known that on a three-dimensional beach large volumes of water carried shorewards by the breakers feed longshore currents, which eventually escape back through the breaker line, often as rip currents. In a steady two-dimensional situation, however, the mass flux represented by (among other things) the surface roller in the breakers returns as a seaward current close to the bottom. This current is called the undertow. In this paper theoretical results for the undertow are compared with the results of recent laboratory experiments.

Keywords


undertow; theoretical study; experimental study

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