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Title: Sediment Provenance Studies of the Calcasieu Ship Channel, Louisiana : A Synopsis Report
Authors: Perkey, David W.
Priestas, Anthony M.
Corbino, Jeffrey M.
Brown, Gary L.
Hartman, Michael A.
Tarpley, Danielle R. N.
Luong, Phu V.
Keywords: Calcasieu River (La.)
Channels (Hydraulic engineering)
Dredging spoil
Lake Charles (La.)
Mexico, Gulf of
Sedimentation and deposition
Sediment transport
Publisher: Engineer Research and Development Center (U.S.)
Series/Report no.: Technical Report (Engineer Research and Development Center (U.S.));no. ERDC/CHL TR-22-13
Abstract: To maintain the navigability of the Calcasieu Ship Channel (CSC), the US Army Corps of Engineers annually dredges millions of cubic yards of sediment from the inland channel. To assess sources of channel shoaling, a previous study examined river and bankline erosion as inputs. Results from that study accounted for approximately 20% of dredged volumes. Through the support of the Regional Sediment Management Program, a follow-up investigation reviewed prior sediment budgets, identified potential missing sediment sources, modeled potential sediment pathways, and utilized geochemical fingerprinting to discern primary shoaling sources to the channel. The missing sediment sources from the original budget include coastally derived sediment from the Gulf of Mexico and terrestrially derived sediment from Lake Calcasieu and surrounding wetlands. Results from geochemical fingerprinting of various potential sediment sources indicate the Calcasieu River and the Gulf of Mexico are primary contributors of sediment to the CSC, and sediments sourced from bankline erosion, Lake Calcasieu bed, and interior wetlands are secondary in nature. These results suggest that engineering solutions to control shoaling in the CSC should be focused on sources originating from the Gulf of Mexico and river headwaters as opposed to Lake Calcasieu, channel banklines, and surrounding wetlands.
Description: Technical Report
Gov't Doc #: ERDC/CHL TR-22-13
Rights: Approved for Public Release; Distribution is Unlimited
Size: 37 pages / 3.22 MB
Types of Materials: PDF
Appears in Collections:Technical Report

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