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Combined Multi-beam Echo Sounder and Acoustic Doppler Profiler Mapping of the Upper St Clair River

James Best;Jonathan Czuba, Kevin Oberg, Daniel Parsons
An integrated multibeam echo sounder and acoustic Doppler current profiler field survey was conducted in July 2008 to investigate the morphodynamics of the upper St. Clair River; assess the nature of the present-day detailed bathymetry and bed morphology; quantify the present-day state of the bed and bedforms and possible causes of bedform activity; and collect field data for model verification and analysis of flow patterns. The overall aim was to produce maps of bathymetry, roughness, grain size, bottom classification and sediment transport direction, investigate whether sediment transport is occurring within the upper St Clair, and assess the main features of both primary and secondary flows within the channel. The work also included an assessment of the precision of the new bathymetric data versus the 1971 bathymetry, comparing areas/quantity of apparent bed morphological change between 2007 and 2008, and an assessment of techniques for measuring sediment transport and grain size.
St. Clair Combined Multi-Beam Echo Sounder & ADCP Mapping
Bed morphology, flow structure, & sediment transport in upper St. Clair River
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Supporting Content (Show)
Main Topics
St. Clair River
Questions We Asked
Has St. Clair morphology changed since 1962, what initiated it, and when?
Key Findings
Evidence suggests St. Clair erosion is not ongoing, but causes remain unknown
Remedial measures should not be taken in the St. Clair
St. Clair River Sediment Regime Analysis