13.2 The Wallis Lake Estuary Management Committee - Great Lakes ...

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Wallis Lake Estuary Management Plan Pioneer Dr Wetland Upstream sampling site Downstream sampling site Kularoo Dr Wetland Goldens Rd Nth Wetland Goldens Rd Sth Wetland To Wyuna Canal [Figure 6.1: Schematic diagram of the artificial wetlands on the K-leg drainage line. Each wetland would act a s a replicate unit for water filtration and treatment (n=4). Sampling would occur when stormwater is flowing after wet weather events at each upstream and downstream sampling site. The average difference between measurements of turbidity, nitrogen and phosphorus at upstream and downstream sites will indicate the filtering and treatment efficiency of the wetland] [Figure 6.2: Sites of annual shellfish samples for pesticide and metals testing by NSW Food Authority. Leases sampled are shown in black] 100
Wallis Lake Estuary Management Plan Strategy/Outcome Actions Monitoring and performance indicator Data interpretation Target Comments Progress Determine baseline water quality in the Wallis Lake estuary W.6.1 N/A Reduce rural land use impacts on water quality in the Wallis Lake estuary W.2.1, W.2.2 Indicators to be measured include; total nitrogen (TN), total phosphorus (TP), oxidised nitrogen (NOx), ammonia (NH4), filterable reactive phosphate (PO4), chlorophyll a, faecal coliform, temperature, salinity, pH, dissolved oxygen and turbidity. Sampling to occur at sites identified in Fig. 4.3 during dry weather, low flow conditions. A pilot study should ensure that these sites are consistent with the Australian Guidelines for Water Quality Monitoring and Reporting (ANZECC & ARMCANZ 2000). Replicate samples are to be taken at each site and processed at Forster Environmental Laboratory. Repeating the monitoring program developed to establish baseline water quality conditions on a regular basis each year would allow for actions designed to improve water quality to be continually and regularly assessed for their effectiveness. Data to be assessed against set numerical guidelines in the Australian and New Zealand guidelines for fresh and marine water quality (ANZECC & ARMCANZ 2000). Data analysis to be consistent with the study design and to be determined in conjunction with site selection. Data analysis as decided above. Targets to be set once baseline conditions determined This baseline information is necessary to set realistic future water quality targets. Commitment to the monitoring program will allow for time series analysis for any trends ie. improving or deteriorating water quality. Regular monitoring in urban areas would also allow an assessment of the effectiveness of actions to reduce impacts of stormwater on water quality. 101
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Wallis Lake Estuary Management Plan
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13.2 The Wallis Lake Estuary Management Committee - Great Lakes ...

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