ON WAVE INDUCED UNDERTOW AT A BARRED BEACH
A new set of quasi-prototype undertow data due to plunging and spilling breakers at a beach bar is obtained. Experience is gained with the use, for the first time, of an ADVP at wave breaking. Dynamics of undertow under spilling and plunging breakers across the bar is observed. In comparison to Tp, the local Hrms is more influent in determining the order of magnitude of undertow. The effect of the surface roller on the undertow is also investigated.