Numerical Model Predictions of Cumberland Sound Sediment Redistribution Associated with Trident Channel Expansion

A previously developed modeling system was used to identify potential areas of sedimentation impact or change associated with Trident channel expansion. The modeling system had been designed and verified to predict average currents and long-term average maintenance dredging requirements for the King...

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Bibliographic Details
Main Author: Granat, Mitchell A.
Other Authors: ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS HYDRAULICS LAB
Format: Text
Language:English
Published: 1990
Subjects:
Physical and Dynamic Oceanography
Civil Engineering
*MAINTENANCE
*DREDGING
*SEDIMENTATION
*CHANNELS(WATERWAYS)
SAND
ENVIRONMENTAL IMPACT
DEPOSITION
EROSION
MATHEMATICAL PREDICTION
SOUNDS(WATERWAYS)
CLAY
EXPANSION
SUBMARINES
SEDIMENTS
BAYS
SILT
DISTRIBUTION
REQUIREMENTS
MATHEMATICAL MODELS
TEST AND EVALUATION
PLANNING
*SUBMARINE CHANNELS
KINGS BAY(GEORGIA)
CUMBERLAND SOUND
Cumberland Sound
Trident
Kings Bay
Online Access:http://www.dtic.mil/docs/citations/ADA224170
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA224170
Description
Summary:A previously developed modeling system was used to identify potential areas of sedimentation impact or change associated with Trident channel expansion. The modeling system had been designed and verified to predict average currents and long-term average maintenance dredging requirements for the Kings Bay submarine channel. Excellent numerical model to field submarine channel sedimentation verification was previously demonstrated for the pre-Trident condition. The dramatic shoaling impact, a 150 percent increase in required yearly maintenance, predicted by the model for the tested Trident plan channel condition added to the interest in Cumberland Sound sediment redistribution. Numerical model predictions of long-term average cohesive (clay and silt) and noncohesive (sand and silt) sedimentation (erosion and deposition) patterns within Cumberland Sound are illustrated for pre-Trident and Trident channel conditions. Quantitative assessments should not be attempted for unverified areas; thus, only qualitative trend-type comparisons should be made for the unverified areas outside the channel area. In general, subtle sedimentation (erosion and deposition) pattern differences between the two conditions are illustrated. The presented results can be used to identify areas of potential impact for consideration in intensifying field monitoring or in modifying the Kings Bay Coastal and Estuarine Physical Monitoring and Evaluation Program. Original contains color plates: All DTIC reproductions will be in black and white.

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