Abstract
ABSTRACTThe general characteristics of boat wash, as affected by boat speed and water depth, are discussed. The classical deep‐water wave pattern, with the most prominent waves at the forward edges of a V‐shaped region of semi‐angle 19 1/2°, becomes modified at high speeds. The effective angle of the V is then reduced and the waves become very long‐crested.In moderately shallow water, the level of the water surface close to the boat (on either side of it) can be depressed by an amount which is greater than the amplitude of the downstream waves. In still shallower water, for boat speeds which would cause appreciable waves in deep water, the boat squats markedly and makes very large waves.Possible implications of these facts for bank erosion are discussed.
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