Beach Changes at Misquamicut Beach, Rhode Island, 1962-1973

Medientyp: Bericht; E-Book

Titel: Beach Changes at Misquamicut Beach, Rhode Island, 1962-1973

Beteiligte: Morton, Robert W. [Verfasser:in]; Bohlen, W. F. [Verfasser:in]; Aubrey, David G. [Verfasser:in]; Miller, Martin C. [Verfasser:in]

Erschienen: U.S. Army Engineer Research and Development Center (ERDC); Coastal Engineering Research Center (CERC); Vicksburg, Mississippi, 1984

Sprache: Englisch

DOI: https://doi.org/20.500.11970/111509

Schlagwörter: Beaches ; Shorelines ; Ingenieurwissenschaften (620) ; Beach erosion ; Image ; Coast changes ; Shore-line ; Misquamicut Beach ; Beach changes ; Beach morphology ; Coastal changes ; Rhode Island

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Beschreibung: Source: https://erdc-library.erdc.dren.mil/jspui/ ; Beach profile data were collected at profile lines on Misquamicut Beach between November 1962 and June 1973. The data were examined for temporal and spatial patterns and variability along the beach face, as well as to identify and assess the forces which influence beach behavior. Misquamicut represents a typical barrier beach. It is sheltered from all directions except the south and southeast with the wave climate modified by Fisher's Island, Long Island, and Block Island. Nearshore bathymetry and a submarine trough in Block Island Sound also modify the wave pattern and intensity. The focusing of energy varies depending on wave direction, but is generally most intense in the center of the beach. Regression analyses on above mean sea level volume versus time indicate a net accretional trend on the beach. Profile line 1, located against the west jetty at Weekapaug Inlet, displayed the highest average accretion rate, 80 cubic meters per meter per year. This accretional trend may result in part from longshore transport into the area. The jetties at Weekapaug Inlet act as a barrier presenting longshore transport to the east. Two shallow nearshore shoals paralleling the beach further prevent sediment loss. They appear to trap beach material during storm events and erosional cycles and return it during accretional cycles. The nourishment of the beach through sand fill along the recreational beach front may also significantly contribute to accretion. There appears to be a seasonal pattern to erosion accretion cycles on Misquamicut Beach. In general, erosion is accelerated from late autumn to early spring, principally as a result of winter storm events, while accretion occurs from late spring to early fall. However, nonseasonal storm events frequently interrupt and obscure this pattern. The beach responds in a similar manner to most storms regardless of the direction of the storm track. The average above mean sea level volume changes attributable to storms range from 5 ...

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