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

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Wallis Lake Estuary Management Plan W.6 Management Area A, B, C, D, E, F Management Objective Prevent future water quality issues, particularly in areas with long flushing times Action No W.6.1 W.6.2 W.6.3 W.6.4 Action Establish baseline water quality conditions prior to any further major development within the catchment Implement the Forster/Tuncurry CDS to ensure that buffer zones and water sensitive urban design are upheld for all new developments Recognise areas with long flushing times sufficient for algal blooms to occur if nutrient loading increases in future planning for development Continue to maximise opportunities for sustainable water re-use schemes for new urban developments in Forster Indicative Cost Priority Responsibilities Progress $15,000 Immediate (A3) GLC Data available from UNSW per year study Staff time High (B3) GLC Ongoing Staff time Immediate (B2) GLC $50,000 High (B4) MidCoast, GLC Ongoing Comments The Wallis Lake water body, including Wallis Creek, is an area where baseline water quality information is lacking. This data is required so that monitoring efforts have a benchmark for comparison. Samples to be collected include TN, TP, NOx, NH4, PO4, faecal coliform and Chl a, in addition to temperature, salinity, pH and turbidity measurments measured 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. Use of water quality data conducted in 2001/2003 by the University of New South Wales in the Wallamba and Wallingat Rivers, Pipers Bay and Forster Keys (tracers and indicators of estuarine nutrients) should be utilised. It is envisaged that this strategy will significantly contribute to the GLC policy of ensuring no nett increase in pollutants to Wallis Lake. 30
Wallis Lake Estuary Management Plan [Figure 4.2: Sites for baseline water quality testing. These additional sites will enhance data collected under the NSW Shellfish Program conducted by NSW Food Authority] 31
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13.2 The Wallis Lake Estuary Management Committee - Great Lakes ...

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