Dredging Research Program: Acoustic Resuspension Measurement System (ARMS) Instrumental Manual
2006
Van Evra , III, Robert E. | Bedford, Keith W.
This report describes the physical and electronic characteristics of an underwater instrument platform that is specifically designed to measure parameters associated with benthic boundary layer activity. The data-acquisition system is intended for use in studies of sediment resuspension and movement in the water column at existing and proposed dredged material placement sites. The system, ARMS, an acronym for Acoustic Resuspension Measurement System, can be deployed remotely at field sites from many vessels of opportunity. The ARMS utilizes technologically advanced underwater acoustic transducers to provide precise remote measurements of fluid and sediment motion. The local water column can thus be studied in an unobstructed state that preserves its naturally occurring hydrodynamic activity over small space and time scales. Other sensors collect information on sediment morphology, wave climate and seafloor orientation; thus, the system acquires data necessary to sufficiently reconstruct the boundary layer entrainment and bottom response characteristics. Such data may be used for site designation and monitoring or verification of environmental numerical simulation models.
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