High Salt Marsh in Georgia

Project Sheet

Location: Glynn County, Brunswick, Brunswick, GA, US

Year: 1978

Project Type(s):Historical dredged material placement / Marsh restoration

Project Description: The purpose of this project was to evaluate the recovery response of salt marsh vegetation and impact of selected species of crabs and snails upon thin layer placement of dredged material. A high, intertidal, homogenous Spartina alterniflora marsh located in Glynn County, Georgia was selected to conduct this pilot research project in the 1970s. The experiments were conducted inside corrugated metal pipes of various length that were inserted into the marsh substrate to a depth of 1.2 m to ensure that only the enclosed area would be influenced by dredged material placement. Six different dredged material thicknesses ranging from 8 cm (3 in.) to 91 cm (36 in.), three different dredged material types (sand, clay, and sand and clay mixture), and three different times for material placement (February, July, and November) were selected for the testes conducted in this study. The results from this pilot scale study indicated that marsh elevation could be altered through thin layer placement of dredged material up to 23 cm (9 in.) without loss of the functional values of the ecosystem and environment.