Please use this identifier to cite or link to this item: https://hdl.handle.net/11681/12935
Title: Analysis of sediment transport in the Brazos River diversion channel entrance region
Authors: United States. Army. Corps of Engineers. Galveston District
Fields, M. Leslie
Weishar, Lee L.
Clausner, James E.
Keywords: Brazos River Diversion Channel
Hydraulic analysis
Longshore transport
Sediment analysis
Sediment transport
Shoaling rate
Shoreline evolution
Publisher: Coastal Engineering Research Center (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: Miscellaneous paper (U.S. Army Engineer Waterways Experiment Station) ; CERC-88-7.
Description: Miscellaneous paper
Abstract: A combined office and field study was conducted to evaluate the feasibility of constructing a navigation channel in the Brazos River Diversion channel (BRDC). The evaluation was made through an analysis of existing data and a computation of shoaling rates. The office study consisted on an evaluation of the shoaling history of the area, which was determined through quantification on an evaluation of the shoaling history of the area, which was determined through quantification of shoreline migration rates, and volumetric changes in the growth of the BRDC delta. Nearshore available longshore sediment transport quantities and rates were determined using Littoral Environment Ovservation (LEO) data. A two-dimensional (2-D) laterally averaged numerical model was used to predict sediment transport in the BRDC for the proposed channel dimensions. A second 2-D numerical-wave refraction/diffraction model was used to predict wave propagation over the Brazos River ebb-tide delta and adjacent regions. Field data utilized to run the numerical models consisted of water surface elevations, current velocities, salinities, suspended sediment concentrations, nearshore sediment samples, and bathymetric survey data. Considerations of the hydraulics in the lower BRDC suggest sediment transport occurs on a seasonal basis, resulting in periodic flushing and shoaling conditions. Shoaling rate calculations for the proposed channel dimensions of 12-ft deep by 125-ft wide, with 6-ft overdredging predict an annual maintenance dredging requirement of 735,000 cu yd, with an estimated project duration of approximately 4 months.
Rights: Approved for public release; distribution is unlimited.
URI: http://hdl.handle.net/11681/12935
Appears in Collections:Miscellaneous Paper

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