Brief description
The dataset consists of water quality parameters that have been monitored on a weekly to monthly basis at three sites in Peel Inlet and central site in Harvey Estuary from August 1977 and another two in Harvey from March 1979 (Site locations shown in large thumbnail). These parameters include: Secchi depth and total depth; surface and bottom pH, salinity, temperature, dissolved oxygen, light attenuation coefficients (calculated from irradiance and depth), total nitrogen, total phosphorus, chlorophyll a, phaeophytin, ammonium, nitrate-nitrite, filterable reactive phosphate and silicate. Samples were taken from the surface and bottom.Lineage
Maintenance and Update Frequency: notPlanned
Statement: The field parameters measured were: Secchi depth and total depth; surface and bottom pH (± 0.1Ph unit, Hanna HI 8424), salinity (± 0.1ppt, Hamon Salinity-Temperature Bridge, Model 602), temperature (± 0.1°C, Hamon Salinity-Temperature Bridge, Model 602) and dissolved oxygen (± 0.2 mg L-1, Yeo-Kal Dissolved Oxygen-Temperature Meter, Model 603). Light attenuation coefficients were calculated from the regression of the logarithm of irradiance values against depth. Irradiance was measured in the water column using a Licor Quantum Meter, with submersible probe, together with Secchi depth. Surface and bottom water samples were taken for total nitrogen (± 200 µg N L-1) and total phosphorus (± 10 µg P L-1). Water was filtered through GF/C filter paper (pore size 1.2 µm, Whatman Ltd, England) to determine chlorophyll a (± 0.1 µg L-1) and phaeophytin (± 0.1 µg L-1) and then 0.45 µm cellulose nitrate filter paper for ammonium (± 4 µg L-1), nitrate-nitrite (± 2 µg L-1), filterable reactive phosphate (± 2 µg L-1) and silicate (± 10 µg L-1). Samples were kept in 'Whirlpaks' on ice in the field and stored frozen in the laboratory until analysis. Chlorophyll a is a measure of phytoplankton abundance and phaeophytin is a degradation product of chlorophyll, and a sign of recently collapsed blooms.
All analyses were carried out by the Marine and Freshwater Research Laboratory, Murdoch University (previously the Nutrient Analyses Laboratory, University of Western Australia). Chlorophyll a and phaeophytin were extracted from the GF/C filter papers by grinding in 90% acetone and storing for 24 hours in the dark at 4°C. The chlorophyll a and phaeophytin concentrations were then measured spectrophotometrically (Varian DMS 90 Spectrophotometer, Varian Techron Pty Ltd, Springvale, Australia) according to the method of Strickland and Parsons (1968) [Strickland, J.D.H. and Parsons, T.R. 1968. A Practical Handbook of Seawater Analysis. (Fisheries Research Board of Canada, Ottawa.)]. Filterable reactive phosphate was analysed by the single solution method (MAFRL, 1998)[MAFRL (Marine and Freshwater Research Laboratory), 1998. Test Methods Manual, Method: 4100A, Murdoch University, Perth WA, pp1-7]; nitrate plus nitrite after copper-cadmium reduction with a Technicon Autoanalyser II (Technicon Industrial Systems, 1975); an ammonia plus ammonium by the phenol-prusside method (Dal Pont et al., 1974)[Dal Pont, G; Hogan, M and Newell, B. 1974. Laboratory techniques in marine chemistry. II Determination of ammonia in seawater and the preservation of samples for nitrate analysis. CSIRO Division of fisheries and Oceanography Report No. 55: pp 1-5.] Total nitrogen and phosphorus were determined from sulphuric and perchloric acid digests respectively; followed by analysis for ammonium and phosphate by the above methods. Total N was computed as a sum of nitrate-nitrite, organic nitrogen and ammonia. Total phosphorus was calculated as the sum of organic phosphorus and orthophosphate and inorganically bound phosphorus.
Further information can be found on the studies' CD-ROM held at Murdoch Library.
Notes
CreditOver the years the following state agencies supported the work described here: Department of Conservation and Environment, Environmental Protection Authority, Agriculture W.A., Water and Rivers Commission, Department of Transport. The following agencies concerned with tertiary institutions also provided support: The Commonwealth Postgraduate Awards Scheme, The Centre for Water Research at the University of Western Australia (UWA), the Botany Department at UWA, the Institute for Environmental Science at Murdoch University, The Marine and Freshwater Research Laboratory at Murdoch University (previously the Nutrient Analysis Laboratory at UWA Botany Department), the School of Environmental Science at Murdoch University, the Murdoch University Senior Scholar in Residence Scheme. Support has also been received from many others including Peel Preservation Group, City of Mandurah, ALCOA Australia Ltd., and the Gordon Reid Foundation.
Created: 16 05 2007
Data time period: 1977-08-01 to 2001-06-01
text: westlimit=115.6; southlimit=-32.8; eastlimit=115.8; northlimit=-32.5
text: uplimit=3; downlimit=0
Subjects
AQUATIC ECOSYSTEMS |
BIOSPHERE |
Chlorophyll |
COASTAL PROCESSES |
Conductivity |
EARTH SCIENCE |
Estuaries |
Estuarine Wetlands |
Light Transmission |
Nutrients |
OCEANS |
Oxygen |
Ph |
TERRESTRIAL HYDROSPHERE |
WATER QUALITY/WATER CHEMISTRY |
Water Temperature |
WETLANDS |
attenuation_coefficient |
depth |
fractional_saturation_of_oxygen_in_sea_water |
mass_concentration_of_ammonia_in_sea_water |
mass_concentration_of_chlorophyll_a_in_sea_water |
mass_concentration_of_nitrate-nitrite_in_sea_water |
mass_concentration_of_organic_nitrogen_in_sea_water |
mass_concentration_of_organic_phosphorus_in_sea_water |
mass_concentration_of_oxygen_in_sea_water |
mass_concentration_of_phaeophytin_in_sea_water |
mass_concentration_of_reactive_phosphate_in_sea_water |
mass_concentration_of_silicate_in_sea_water |
oceans |
pH |
sea_surface_salinity |
sea_water_salinity |
sea_water_temperature |
secchi_depth_of_sea_water |
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Other Information
Water quality data (PeelHarvey water quality.xls)
global : 30ce56c0-0d86-11dc-b244-00188b4c0af8
Identifiers
- global : 9694c100-0d78-11dc-b244-00188b4c0af8
