RFG 2018 Conference

erosion

Contributions of shore erosion and resuspension to nearshore turbidity in the Choptank River, Maryland

This work contributed to the Chesapeake 2000 agreement’s commitment to reduce Chesapeake Bay sediment loads to support the aquatic living resources of the Bay and its tributaries and to remove these waters from the list of impaired waters under the Clean Water Act by 2010 (http://www.chesapeakebay.net/content/publications/cbp_12081.pdf). The study provides a basis for setting achievable sediment reduction goals under the Clean Water Act through increasing the understanding of sediment loads attributable to shore erosion.

Deer Island and Marsh Point Erosion - 50 year extrapolations

The theoretical shoreline configurations (Figures 1 and 2) are based on historic data, and should be treated as one of many likely scenarios, depending on future conditions. It should not be used to design structures; it is primarily intended to outline the potential magnitude of shoreline change. This being said, the modeled outcome appears to be in line with the present evolution of each area.

Deer Island-1993 to 1999

Deer Island, located in eastern Harrison County, Mississippi, is a privately held island and the closest of the Mississippi Islands to the mainland. It is a remnant Holocene beach ridge segment with a core of Gulfport sands (Otvos, 1985). The island has a stable history; unlike the islands located to its south, it is not dominated by migration. Of more concern is erosion, as there is no local (or updrift) source of sand to replenish what is lost during storm events. The southern shore of Deer Island is fronted by a large shallow sand sheet, which acts to buffer the island. This sand sheet is probably a result of island erosion through time and is underlain largely by Gulfport sands. The following data is being presented as an update on shoreline trends in the past 6 years, including the passage of Hurricane Georges.

Nearshore Bar Morphology with Relationship to Shoreline Change on a Renourished Beach: Harrison County, MS

A long-term pattern of erosion, especially in specific areas – ‘hot spots’ – along the wholly renourished beach in Harrison County, Mississippi, prompts the need to periodically renourish the entire beach. A dominant characteristic of mainland beaches in Mississippi is their broad, flat, nearshore platforms, which are typified by well-developed bar morphologies. Nearshore bar morphology in Mississippi Sound has been broadly studied in the past, but it has not been compared to shoreline change patterns. This study focuses on the relationship between shoreline change and nearshore bar morphology.

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