Effectiveness of recurved wave return walls

Model studies have been carried out at a scale of 1:15 to measure the overtopping discharges for recurved wave return walls located on top of smooth, plain sloping seawalls. The measured discharges were compared with the expected values if the wave return walls had been absent, to derive a discharge factor representing the effectiveness of the return wall. These expected discharges were estimated from dimensionless expressions derived from many tests reported elsewhere.