Brief description
The objective of the research reported in this thesis was to develop a technique to monitor the dynamics of sediments and nutrients entering the coastal ocean with river plumes associated with high intensity low frequency events (e.g. floods), using ocean colour remote sensing. The data collected included suspended sediment concentration (TSS) and turbidity profiles.Lineage
Maintenance and Update Frequency: notPlanned
Statement: Total suspended sediment concentration TSS is defined as the dry weight of the material collected on a 0.7 um filter by seawater. The determination technique is called gravimetric filter analysis for total suspended matter, and the actual procedure is carried out in the following manner. A volume of seawater is filtered through pre-washed and pre-weighted 0.7 um glass fibre filters (Whatman GF/F filters). Normally, filtration is stopped when the filter clogs because sufficient material is then on the filter. After seawater filtration the filters are washed with 250 mL distilled water to dissolve salts, dried in an oven at 65ºC for 24 hours, cooled down to room temperature in a dessicator to avoid the uptake of atmospheric moisture, and finally weighed on an electrobalance. The concentration of TSS is calculated from the dry weight difference of filters before and after filtration divided by the sample volume and is expressed as mg/L or equivalently g/m3. A blank filter is used to calculate the handling error of the measurement procedure. Turbidity was measured by an Analite NEP160 turbidity meter. In the instrument submerged into the water sample a beam of light scattered within a broad angle centred on 90 deg is measured by a photomultiplier. The turbidity of the sample is then estimated in nephelometric turbidity units (NTU) relative to standard solutions.
Statement: Turbidity was measured by an Analite NEP160 turbidity meter.
Notes
CreditUniversity of Sydney
Purpose
During the 7-20 February 2004 field trip to Lucinda Jetty a number of sediment-related measurements were undertaken to study flood-induced suspended sediment transport in the Herbert River mouth and adjacent coastal waters. The data collected included vertical profiles of turbidity, fraction of organic matter in Total Suspended Sediments (TSS) and Secchi disk depth.
During the 7-20 February 2004 field trip to Lucinda Jetty a number of sediment-related measurements were undertaken to study flood-induced suspended sediment transport in the Herbert River mouth and adjacent coastal waters. The data collected included vertical profiles of turbidity, fraction of organic matter in Total Suspended Sediments (TSS) and Secchi disk depth.
Issued: 23 02 2007
Data time period: 2004-02-16 to 2004-02-16
text: westlimit=146.3862; southlimit=-18.5194; eastlimit=146.3374; northlimit=-18.5234
text: uplimit=12; downlimit=0
Subjects
EARTH SCIENCE |
OCEAN OPTICS |
OCEANS |
Turbidity |
concentration_of_total_suspended_sediments |
depth |
oceans |
secchi disc depth |
secchi_depth_of_sea_water |
total suspended sediments |
turbidity |
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Other Information
(USYD_20070223_HerbertRiver_LucindaJetty_Neph11_Data.xls)
Identifiers
- global : 43f54ea0-082e-11dc-82f8-00188b4c0af8
