Application of sediment end-member analysis for understanding sediment fluxes, northern Chandeleur Islands, Louisiana
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Abstract
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.
Study Area
| Publication type | Conference Paper |
|---|---|
| Title | Application of sediment end-member analysis for understanding sediment fluxes, northern Chandeleur Islands, Louisiana |
| DOI | 10.1142/9789811204487_0003 |
| Year Published | 2019 |
| Language | English |
| Publisher | World Scientific Co. Pte. Ltd. |
| Contributing office(s) | St. Petersburg Coastal and Marine Science Center |
| Description | 14 p. |
| Larger Work Type | Book |
| Larger Work Subtype | Conference publication |
| Larger Work Title | Coastal Sediments 2019—Proceedings of the 9th International Conference |
| First page | 25 |
| Last page | 38 |
| Conference Title | Coastal Sediments 2019 |
| Conference Location | Tampa/St. Petersburg, Florida |
| Conference Date | May 27-31, 2019 |
| Country | United States |
| State | Louisiana |
| Other Geospatial | Northern Chandeleur Islands |
| Google Analytic Metrics | Metrics page |