Effects of Beach Nourishment on the Nearshore Environment in Lake Huron at Lexington Harbor (Michigan).
COASTAL ENGINEERING RESEARCH CENTER FORT BELVOIR VA
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In October 1980 the U.S. Army Corps of Engineers conducted a beach nourishment project at the Lexington Michigan Harbor on the southwest shore of Lake Huron, a project designed to mitigate beach erosion attributable to the installation of the harbor. In response to a request from the Coastal Engineering Research Center CERC, the U.S. Fish and Wildlife Services Great Lakes Fishery Laboratory conducted a Corps-funded study from June 1980 to October 1981 along a 8.4-kilometer segment of shoreline adjacent to the harbor to determine the effect of the Corps beach nourishment project on the nearshore aquatic environment. The study performed by the service included aerial photographic surveys of the study area measurement of dissolved oxygen, turbidity, and suspended particulate matter levels and collection of lake bottom sediments, macrozoobenthos and fish. Analysis of the aerial photographs showed that the beach face profile changed markedly during the study as a result of beach nourishment. Dredging of about 19,000 cubic meters of beach sediment from an accretion area adjacent to the harbors north breakwater caused the beach face to recede, while deposition of this sediment on a feeder beach south of the harbor caused the beach face there to extend lakeward.
- Biological Oceanography
- Civil Engineering