The U.S. Army Engineer Division, New England (CENED) requested assistance from the U.S. Army Engineer Waterways Experiment Station, Coastal Engineering Research Center in quantifying storm-induced coastal processes, including beach erosion and overtopping along the Revere Beach and Point of Pines (POP) coastal reach. Specifically, CERC was asked by CENED to evaluate the degree of protection provided by a coarse-grained beach fill at Revere Beach, as well as to assess the benefits and optimize the design of a revetment and/or beach fill and dune system at POP. Wave and water level conditions associated with a set of 50 storms were defined using measured water level data and hindcast wave data. The cross-shore profile response model Storm-Induced BEAch CHange (SBEACH) was applied to evaluate beach profile change. A runup and overtopping module was developed during the study, and a set of physical modeling tests were conducted to further test and improve the module. Each of the 50 storms was used as input to the runup and overtopping module. The study was conducted in two parts. In Part I, CERC developed a nearshore wave and water level database using hindcast wind and wave data for 11 historical northeaster storms from which a suite of 50 synthetic storms was created. Simulations with SBEACH using this storm database indicated that the existing coarse-grained beach fill at Revere Beach might provide unexpected flood protection due to its greater erosive resistance relative to the native material. This result was substantiated with observations of beach response and overtopping rates during the 1991 "Halloween" stom, which impacted the area from 27 October - 1 November 1991. Additionally, Part I indicated that a sand dunehem system might provide sufficient flood protection at POP. Part II used pre- and post-Halloween storm data to (a) validate application of SBEACH to the project site: (b) test sensitivity of SBEACH to variations in median grain size, and wave height and angle; (c) develop a runup and overtopping module, which used SBEACH output to predict overtopping volumes, and (d) predict profile response and overtopping volumes due to the nearshore wave and water level database developed in Part I. Based on interim results of Part 11, a physical model study of overtopping was added to provide data with which to further refine the runup and overtopping module. Results indicated that the existing coarse-grained beach fill at Revere Beach, and proposed coarse-grained fill at POP provide significant storm-induced flood protection benefits over the existing condition or a native-sized beach fill. Observations of stability and minimal overtopping at Revere Beach during the Halloween storm, as compared to other historical storms, substantiated these results. Dune and profile response simulations at POP indicate that a coarse-grained duneberm or combination revetment and beach fill project would provide the required level of storm-induced erosion and flood protection.


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    Title :

    Revere Beach and Point of Pines, Massachusetts, Shore Front Study


    Contributors:

    Published in:

    Publication date :

    1994


    Size :

    9858202


    Type of media :

    Report


    Type of material :

    Electronic Resource


    Language :

    English



    Classification :


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