Abstract
Shoreline erosion downdrift of littoral barriers, such as harbor breakwaters, is a universal concern. The beneficial use of dredged sediment through placement in the nearshore downdrift of littoral barriers is common place, but key questions about the sediment transport and shoreline response remain challenging. To that end, the shoreline at Ogden Dunes, Indiana, along the southern shores of Lake Michigan is investigated with historical aerial photographs, nearshore placement records, hydrodynamic and bathymetric field data, and numerical models.
Highlights
The shoreline at Ogden Dunes, Indiana, along the southern shores of Lake Michigan is investigated with historical aerial photographs, nearshore placement records, hydrodynamic and bathymetric field data, and numerical models
1.6 Mm3 (2 Myd3) of dredged sediment from the Port of Indiana, the Burns Small Boat Harbor, and the Northern Indiana Public Service Company (NIPSCO) intake have been beneficially used by placement in the nearshore or directly on the Ogden Dunes beach since 1982
The Coastal Modeling System (CMS) model used wind and wave conditions from an offshore wave buoy and the wave transformation into the nearshore was validated with the nearshore ADCP during the same time frame as the bathymetric surveys
Summary
The beneficial use of dredged sediment through placement in the nearshore downdrift of littoral barriers is common place, but key questions about the sediment transport and shoreline response remain challenging. The shoreline at Ogden Dunes, Indiana, along the southern shores of Lake Michigan is investigated with historical aerial photographs, nearshore placement records, hydrodynamic and bathymetric field data, and numerical models. 1.6 Mm3 (2 Myd3) of dredged sediment from the Port of Indiana, the Burns Small Boat Harbor, and the Northern Indiana Public Service Company (NIPSCO) intake have been beneficially used by placement in the nearshore or directly on the Ogden Dunes beach since 1982.
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