to increase the understanding of water quality in Storm Bay, the lower Derwent Estuary and the D'Entrecasteaux Channel.
to increase the understanding of the contribution of each water body (Derwent Estuary, Storm Bay and the D’Entrecasteaux Channel) to the overall water quality of the region.
for comparison with Default Guideline Values (DGVs) for aquatic ecosystems within the region.
to assist nutrient dispersion modelling and biogeochemical model development and validation.
Default Guideline Values (DGVs) for aquatic ecosystems
Default Guideline Values (DGVs) for aquatic ecosystems have been derived for various segments of the south east of Tasmania. The DGVs are based on the Oil Spill Response Atlas (OSRA) segments and provide a level of refinement over the interim Default guideline values for Coastal and Marine waters based on the IMCRA bioregion. The available data for the segments has allowed for the derivation of annual and where sufficient data is available seasonal DGVs for key indicators. For dissolved oxygen, temperature, and pH the 20th percentile represents the lower DGV and the 80th percentile the upper DGV, whilst for all other indicators the 80th percentile represents the DGV. Information on the data used for each OSRA segment within an area is outlined in the following section.
Storm Bay
Default Guideline Values (DGVs) for aquatic ecosystems have been derived for the three (3) OSRA segments within Storm Bay.
Eastern Storm Bay
The available data for the eastern side of Storm Bay from February 2014 to May 2019 has allowed for the derivation of annual and seasonal DGVs of surface, 5 to 10 metre depth range, integrated depth, and bottom waters for key indicators.
Default Guideline Values for Aquatic Ecosystems Storm Bay - OSRA segment 80 (PDF 579Kb)
Western Storm Bay
The available data for the western side of Storm Bay from January 2018 to May 2019 has allowed for the derivation of annual DGVs of surface,10 metre depth, integrated depth, and bottom waters for key indicators.
Default Guideline Values for Aquatic Ecosystems Storm Bay - OSRA segment 93 (PDF 374Kb)
North Eastern Storm Bay
The available data for the north eastern side of Storm Bay from October 2016 to October 2020 has allowed for the derivation of annual DGVs of surface,10 metre depth, integrated depth, and bottom waters for key indicators.
Default Guideline Values for Aquatic Ecosystems Storm Bay - OSRA segment 81 (PDF 306Kb)
D'Entrecasteaux Channel and Recherche Bay area
Default Guideline Values (DGVs) for aquatic ecosystems have been derived for the six (6) OSRA segments within the D'Entrecasteaux Channel and Recherche Bay area. The available data from March 2009 to October 2018 has allowed for the derivation of annual and seasonal DGVs of surface, 5 metre depth, integrated depth, and bottom waters for key indicators.
Upper channel (Dennes Point to Kinghorne Point)
Default Guideline Values for Aquatic Ecosystems D'Entrecasteaux channel - OSRA segment 92 (PDF 632Kb)
Upper Mid Channel (Kinghorne Point to Simpsons Point)
Default Guideline Values for Aquatic Ecosystems D'Entrecasteaux channel - OSRA segment 94 (PDF 586Kb)
Central Mid Channel (Simpsons Point to near Ventenat Point)
Default Guideline Values for Aquatic Ecosystems D'Entrecasteaux channel - OSRA segment 96 (PDF 613Kb)
Lower Mid Channel (near Ventenat Point to Partridge narrows)
Default Guideline Values for Aquatic Ecosystems D'Entrecasteaux channel - OSRA segment 99 (PDF 598Kb)
Lower Channel (Partridge narrows to near Courts Island)
Default Guideline Values for Aquatic Ecosystems D'Entrecasteaux channel - OSRA segment 102 (PDF 583Kb)
Tasman Sea - Recherche Bay
Default Guideline Values for Aquatic Ecosystems Recherche Bay - OSRA segment 103 (PDF 572Kb)
Huon Estuary
Default Guideline Values (DGVs) for aquatic ecosystems have been derived for the two (2) OSRA segments within the Huon Estuary. The available data from March 2009 to October 2018 has allowed for the derivation of annual and seasonal DGVs of surface, 5 metre depth, integrated depth, and bottom waters for key indicators.
Upper Estuary
Default Guideline Values for Aquatic Ecosystems Huon Estuary - OSRA segment 98 (PDF 642Kb)
Lower Estuary and Port Cygnet
Default Guideline Values for Aquatic Ecosystems Huon Estuary - OSRA segment 97 (PDF 634Kb)
Derwent Estuary
Default Guideline Values (DGVs) for aquatic ecosystems have as yet not been derived for the four (4) OSRA segments within the Derwent Estuary.
Frederick Henry and Norfolk Bays (including Pitt Water)
Default Guideline Values (DGVs) for aquatic ecosystems have as yet not been derived for the six (6) OSRA segments within Frederick Henry Bay, Norfolk Bay and Pitt Water.
Results
Storm Bay January 2018 to March 2019
The monitoring undertaken from January 2018 to March 2019 aimed to increase the understanding of water quality in Storm Bay and provided a dataset suitable for the derivation of DGVs for aquatic ecosystems of the western side of Storm Bay adjacent to northern Bruny Island (segment 93).