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Optimized measurements of discharge and suspended sediment transport in a salt marsh drainage system
Boon, John D.
Boon, John D.
Abstract
Detailed measurements of current speed and suspended sedlment concentration distributions in a channel cross-section of a tidal marsh creek were analyzed. Subsequent sampiing Intervals In time and space were selected to provide acceptable estimates of flood and ebb transport of water and suspended sediment post the cross sectlon. Data from eight 13-hour measurement runs taken at various times of the year seem to favor a net ebb resldual of suspended sedlment transport for the year In question. A number of environmental factors appear to Influence suspended sediment trons· port in marsh channels.Residual transport of sediment In these systems is, however, considered to be primarily related to a diffusive mechanism associated with a pronounced asymmetry In the time-varying discharge and velocity curves. This mechanism and the observations mode to dote suggest that the inner marsh drainage system is, on balance, an erosional feature and not a conveyance for marsh building sediments.
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1974
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Physical Sciences Peer-Reviewed Articles
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Virginia Institute of Marine Science