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Characteristics of sediments

Description: 

Predicting and measuring the characteristics of sediments generated by dredging
Characterisation and prediction of dredge-generated sediment plume dynamics and fate

Other Details: 

Dredging Science Program: Theme 2 and 3
Location: Pilbara and Kimberley
Project Leader:,Graham Symonds, CSIRO
Telephone: 6369 4015
Email: graham.symonds@csiro.au

FINAL REPORTS:

Generation of sediments by dredging_Review_WAMSI DSN Report 2.1_Mills & Kemps 2016_FINAL

Estimating dredge source terms – a review of contemporary practice in the context of Environmental Impact Assessment in Western Australia WAMSI DSN Report 2.2 Kemps & Masini 2017 FINAL

Optical remote sensing for dredge plume monitoring_Review_WAMSI DSN Report 3.1.1_Fearns et al 2017_FINAL

Sediment transport processes_Review_WAMSI DSN Report 3.1.2_Lowe & Ghisalberti 2016_FINAL

Numerical modelling of dredge plumes_Review_WAMSI DSN Report 3.1.3_Sun et_al 2016_FINAL

SUMMARY:

Theme 2/3 will study near- and far-field plumes around the Chevron Wheatstone dredging program (due to commence in 1st quarter 2013).

The overall objective of this project is;

To develop protocols and guidelines for field, lab, remote sensing and numerical modelling procedures for (a) predicting and (b) monitoring dredge plume dispersal and the corresponding zones of impact.

To achieve this objective the project aims to improve understanding of the key physical processes that control the extent, intensity and duration of dredge generated sediment plumes from the actual dredge site and dredge spoil grounds and the deposition/resuspension processes across a range of habitats that may lead to further dispersal by currents and waves. The theme consists of numerical modelling, laboratory experiments, and a coordinated field program. Field measurements of sediment and plume characteristics will be obtained from the near-field dynamic plume to the full extent of the passive plume. In addition, measurements of the smaller-scale sediment transport processes, which control the deposition and resuspension of dredge plumes over a range of benthic substrates and habitat types, will be undertaken. These results will improve predictions of zones of impact and provide necessary datasets to map ecological responses (as defined by other themes).