Irregular Wave Overtopping of Seawall/Revetment Configurations, Roughans Point, Massachusetts. Environmental Model Investigation

摘要

This report discusses laboratory model tests of irregular wave overtopping for seawall and revetment configurations being considered for use at Roughans Point, Massachusetts. The tests were initiated by US Army Engineer Division, New england, because of a lack of confidence in their wave overtopping estimates made by using the Shore Protection Manual (1984). Roughans Point is a 55-acre residential area which is partially protected from coastal flooding by seawalls on both its northern and eastern boundaries. The Roughans Point interior suffers damage from frequent flooding caused by the overtopping of seawalls. Laboratory tests discussed in this report were part of a more comprehensive study which included extensive use of computer models to calculate the frequency of occurrence of flood water levels for the interior of Roughans Point, along the open coast to the north, and for estuarine areas along the Saugus-Pines River system. The physical model tests provided wave overtopping coefficients only for the various seawall/revetment configurations used in the numerical flood routing model for the interior of Roughans Point.