Brief description
Torres Strait is one of Australia's most important seaways in terms of shipping and defence. It forms Australia's only true international boundary. It is a shipping focal area and major seaway for Australian and foreign merchant vessels. This is the third report, in a series of four (four cruises represented in image), outlining the results of investigations into sandwave movement, currents and sedimentation in the main shipping channels of Torres Strait.Lineage
Statement: A total of 115 stations were occupied in the Torres Strait area during the cruise C9-90 of HMAS Cook. A surficial sediment grab sample was obtained at most of the stations.In the laboratory, samples from the study were analysed for gravel-sand-mud content using 2.0 and 0.063mm sieves; the oven dried samples were weighed to yield size fractions.
The sand and mud fractions were then analysed from carbonate content using an acid bomb. Total carbonate content was derived assuming the gravel fraction to be formed entirely of carbonate, which was confirmed for each sample by tests under the microscope using 3 Molar HCL.
Statement: Surficial sediment grab samples were obtained using a Smith-Macintyre grab.
Cores were obtained using a vibrocorer.
The temperature/salinity measurements were made with a Yeokal CTD conductivity, temperature, dissolved oxygen and pH probe.
Water samples were obtained for suspended sediments and chlorophyll.
Cores were obtained using a vibrocorer.
The temperature/salinity measurements were made with a Yeokal CTD conductivity, temperature, dissolved oxygen and pH probe.
Water samples were obtained for suspended sediments and chlorophyll.
Notes
CreditCole, A.R.
Credit
University of Sydney
University of Sydney
Credit
Materials Research Laboratory, Defence Science and Technology Organisation
Materials Research Laboratory, Defence Science and Technology Organisation
Purpose
The aims of the project are: 1. To map the distribution of mobile bedforms (sandwaves/sand banks) and locations of sediment accumulation (thickness above bedrock) versus areas of scour in Torres Strait. 2. To identify the sediment's physical properties and assess them with respect to burial upon impact of objects. 3. To quantify current strengths along shipping channels. 4. On basis of the above, to quantify sediment transport and sedimentation (vertical accretion) rates in and adjacent to the shipping channels of Torres Strait.
The aims of the project are: 1. To map the distribution of mobile bedforms (sandwaves/sand banks) and locations of sediment accumulation (thickness above bedrock) versus areas of scour in Torres Strait. 2. To identify the sediment's physical properties and assess them with respect to burial upon impact of objects. 3. To quantify current strengths along shipping channels. 4. On basis of the above, to quantify sediment transport and sedimentation (vertical accretion) rates in and adjacent to the shipping channels of Torres Strait.
Issued: 09 07 2007
Data time period: 1990-04-01 to 1990-04-30
text: westlimit=141.5; southlimit=-10.5; eastlimit=144.5; northlimit=-8.5
Subjects
EARTH SCIENCE |
MARINE SEDIMENTS |
OCEAN CIRCULATION |
Ocean Currents |
OCEAN OPTICS |
OCEAN TEMPERATURE |
OCEANS |
Salinity |
SALINITY/DENSITY |
Sedimentation |
Turbidity |
Water Temperature |
oceans |
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Identifiers
- global : 0beb70a0-2e9b-11dc-9bc1-00188b4c0af8
