The U.S. Army Engineer District, Galveston, has recently enlarged the Houston Ship Channel from a 40-ft (12.2-m) depth by 400-ft (122-m) width to a 45-ft (13.7-m) depth by 530-ft (162-m) width. Previously, a three-dimensional (3-D) numerical model study was implemented at the U.S. Army Engineer Research and Development Center's Coastal and Hydraulics Laboratory to evaluate the salinity and circulation impact of this enlargement. The enlarged channel is nearly complete. Preliminary evaluations indicate a higher than anticipated rate of deposition in the channel reach near Atkinson Island. The purpose of this investigation was to determine if this new shoaling rate was a permanent feature of this new channel or a single anomalous event. If this considerably larger deposition is a permanent condition then the planned disposal locations must be expanded. The project will determine the possible effects on sedimentation in the channel based on dredging records, field data, vessel effects, and hydrodynamic changes due to the channel's enlargement. DISCLAIMER: The contents of this report are not to be used for advertising, publication, or promotional purposes. Citation of trade names does not constitute an official endorsement or approval of the use of such commercial products. All product names and trademarks cited are the property of their respective owners. The findings of this report are not to be construed as an official Department of the Army position unless so designated by other authorized documents.
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