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WAMSI 2 - Dredging Node 3.2.2 - Plume Characterization – Lab Studies

Created 12/03/2025

Updated 12/03/2025

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The key objectives of Project 3.2: (1) Characterize the physical/optical properties of sediment suspensions; (2) Map the dredge-generated plume; (3) Provide data to optimize and validate plume modelling; (5) Assess the spatial and temporal variability (~10 years) of background suspended sediment loads using archived remote sensing data; (6) To estimate the benthic light field with respect to TSS; In this study we investigated various common turbidity sensors, including optical scattering and acoustic scattering instrumentation, and compared and contrasted their effectiveness in estimating particle load (TSS concentration), and/or Particle Size Distributions (PSDs). Studies were conducted in a controlled laboratory-based setting with a range of different sediment types primarily obtained from the Pilbara coast. More specifically we: • determined the particle size (PS) of sediment samples from Pilbara coastal waters using a sequoia scientific LISST 100X submersible particle size analyser and related PS to the particulate backscattering slope (γbp parameter) of HobiLabs HydroScat-6 and the particulate scattering slope (γb parameter) of WETLabs acs-176; • Established the relationship between Turb and TSS concentration using the optical properties of particulate backscattering coefficient (bbp), scattering coefficient (bb) and total absorptions (a) from HydroScat-6 and acs-176; Wetlabs ECO NTU and Campbell Scientific OBS3+.

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Title WAMSI 2 - Dredging Node 3.2.2 - Plume Characterization – Lab Studies
Language eng
Licence notspecified
Landing Page https://devweb.dga.links.com.au/data/dataset/8b974c10-df21-4cb0-8f3a-6c0db15989b6
Contact Point
CSIRO Oceans & Atmosphere
peter.fearns@gmail.com
Reference Period 17/10/2018
Geospatial Coverage {"type": "Polygon", "coordinates": [[[115.40264, -21.34139], [114.68616, -21.34139], [114.68616, -21.61868], [115.40264, -21.61868], [115.40264, -21.34139]]]}
Data Portal data.gov.au