Author(s): V. Muller; H. Eden; D. Vorrath

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Keywords: DSLP®-method; ADCP; LOG＿aFlow®; Dredging; Near-bottom sediment dynamics

Abstract: Estimation of near – bottom sediment dynamics has become of growing importance for an effective dredging management and/or design of harbour and coastal structures. But remote sensing of the near – bottom flow and sediment phenomena is a difficult and complex measuring task. Often remote sensing attempts were made to determine some parameters of near bottom sediment dynamics by a combination of fan out sounding systems with measurements of the flow by ADCP-technology. With direct measurement technologies it is difficult or cost-intensive to reach a synoptic result of the near – bottom fluid – sediment interactions especially at tidal dominated regions. By combination of an innovative echo sounding technology, the DSLP® – method ‘Detection of Sediment Layers and Properties' with ADCP – measurements and LOG＿aFlow®, a hydrodynamic data interpolation technology, near – bottom sediment dynamics will be estimated more accurately. Determination of both, flow determined erosion/sedimentation – probabilities and thickness of the suspension layers, is a necessary requirement to calculate sedimentation as well erosion areas in means. These combined measuring and data evaluation technologies allow to give a forecast on the trend of bathymetry and should be an effective tool for dredging management.

DOI:

Year: 2001