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Sediment Provenance Studies of the Calcasieu Ship Channel, Louisiana : A Synopsis Report.
| 题名： | Sediment Provenance Studies of the Calcasieu Ship Channel, Louisiana : A Synopsis Report. |
| 作者： | Perkey, D. W; Priestas, A. M; Corbino, J. M; Brown, G. L; Hartman, M. A; Tarpley, D. R; Luong, P. V. |
| 摘要： | To maintain the navigability of the Calcasieu Ship Channel (CSC), theUS Army Corps of Engineers annually dredges millions of cubic yards ofsediment from the inland channel. To assess sources of channel shoaling, aprevious study examined river and bankline erosion as inputs. Resultsfrom that study accounted for approximately 20% of dredged volumes.Through the support of the Regional Sediment Management Program, afollow-up investigation reviewed prior sediment budgets, identifiedpotential missing sediment sources, modeled potential sedimentpathways, and utilized geochemical fingerprinting to discern primaryshoaling sources to the channel. The missing sediment sources from theoriginal budget include coastally derived sediment from the Gulf of Mexicoand terrestrially derived sediment from Lake Calcasieu and surroundingwetlands. Results from geochemical fingerprinting of various potentialsediment sources indicate the Calcasieu River and the Gulf of Mexico areprimary contributors of sediment to the CSC, and sediments sourced frombankline erosion, Lake Calcasieu bed, and interior wetlands are secondaryin nature. These results suggest that engineering solutions to controlshoaling in the CSC should be focused on sources originating from the Gulfof Mexico and river headwaters as opposed to Lake Calcasieu, channelbanklines, and surrounding wetlands. |
| 总页数： | 37 pages |
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