Sediment tracing from the catchment to reef 2016 to 2018: Flood plume, marine sediment trap and logger data time series

Lewis, S.;Bainbridge, Z.;Stevens, T.;Garzon-Garcia, A.;Chen, C.;Burton, J.;Bahadon, M.;Rezaei Rashti, M.;Gorman, J.;Smithers, S.;Olley, J.;Moody, P.;Dehayr, R.

Stephen Lewis Scott Smithers

Abstract

The sediment dynamics at marine sites in the inshore GBRL region likely fall into three separate categories including sites where: 1. input of new terrigenous sediments have by far the greatest influence on sediment exposure and subsequent resuspension (e.g. Dunk Island, Orpheus Island, Havannah Island, Cleveland Bay?); 2. input of new terrigenous sediments are at least equivalent to resuspension events which likely increases upon larger river discharge events (e.g. Cleveland Bay?, Orchard Rocks). 3. input of new terrigenous sediments are less than or equal to common resuspension events (e.g. Middle Reef, Geoffrey Bay). This provides some of the first empirical data to support the findings of the satellite photic depth modelling of Fabricius et al. (2014, 2016) where the delivery of new terrigenous sediment considerably influences water clarity on the inshore Great Barrier Reef.

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18/57

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978-1-925514-34-6

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Reef and Rainforest Research Centre

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Cairns, QLD, Australia

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