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Laboratory and Field Investigations of Marsh Edge Erosion

TitleLaboratory and Field Investigations of Marsh Edge Erosion
Publication TypeBook Chapter
Year of Publication2013
AuthorsChen Q., Ozeren Y, Zhang G, Wren D., Wu W., Jadhav R., Parker K., Pant H.
Book TitleSediment Transport: Monitoring, Modeling and Management
PublisherNova Science Publishers, Inc.

This chapter presents the laboratory experiments and field observations of marsh edge erosion. The marsh retreat rate in a field study site in Terrebonne Bay, Louisiana, was measured using GPS systems and aerial photographs. The wave environment was also measured in order to correlate the marsh edge retreat rate and wave conditions. A physical model of marsh edge was constructed in a laboratory using the intact marsh edge samples collected from the field, and its erosion by wave undercutting was recorded. In-situ and laboratory testing were carried out to determine and understand the critical shear stress for marsh soil erosion. Other laboratory measurements, including organic matter content, water content, root content, and particle size distribution, were also conducted. The critical shear stress was found to depend on soil depth and root content.