We analyzed grain-size distributions (GSDs) from a time-series of sediment samples to evaluate sediment transport following anthropogenic sand-berm emplacement at the northern Chandeleur Islands, Louisiana. End-member analysis (EMA) was applied to compare the end-member (EM) GSD of a known sediment source to GSDs from surrounding environments and characterize the physical redistribution of source sediment over time. Although we successfully modeled a proxy borrow-source EM using pre-emplacement (2007-2008) datasets, this EM is not easily distinguishable from the modeled emergent-island EM, possibly because the baseline dataset did not provide the necessary sample distribution to distinguish the range of depositional environments. Comparison of post-emplacement (2012) samples from the berm and natural island with the proxy borrow-source EM suggests that this application of EMA can be a valuable tool for understanding sediment redistribution subsequent to restoration efforts, especially if the GSDs of the emplaced and naturally-occurring sediments are dissimilar and adequately sampled.
Citation Information
| Publication Year | 2019 |
|---|---|
| Title | Application of sediment end-member analysis for understanding sediment fluxes, northern Chandeleur Islands, Louisiana |
| DOI | 10.1142/9789811204487_0003 |
| Authors | Julie Bernier, Jennifer L. Miselis, Noreen A. Buster, James G. Flocks |
| Publication Type | Conference Paper |
| Index ID | 70204255 |
| Record Source | USGS Publications Warehouse |
| USGS Organization | St. Petersburg Coastal and Marine Science Center |
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Julie Bernier
Jennifer L Miselis, Ph.D.
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Julie Bernier
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EmailPhoneJames Flocks
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