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

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Wallis Lake Estuary Management Plan 6 Monitor and review process The WLEMIC will be responsible for directing the monitor and review process. This process will assess the performance of the WLEMP and ensure it is continually updated and improved. Table 6.1 proposes an integrated monitoring and assessment program showing the relationships between recommended actions, performance indicators to be monitored, data interpretation methodology, and targets for actions where baseline data is available. Upon formal adoption of the plan, the WLEMIC will be required to develop and fully cost a more thorough and detailed monitoring and review program consistent with NHT/CMA reporting protocols clearly defining estuary and management targets and, where possible, providing a cost-benefit analysis for each action. This may result in the designated priority of actions being reassessed to incorporate their cost effectiveness. A standardised reporting format should be utilised on an annual basis to briefly evaluate the progress of the plan and the efficiency and effectiveness of management actions implemented over each annual reporting period. The results of the monitoring program should become part of routine SoE reporting and also reported to the wider community via local media, GLC’s web page and community newsletters. Every 5 years a formal review of the WLEMP should identify any new issues and conflicts concerning the Wallis Lake estuary and ensure their incorporation into a revised plan. A program for the following 5 years should be developed by designating priority to any new actions and reassigning priority to the remaining actions. Commitment by the signatories to the SOJI should also be renewed and should include any new signatories where necessary. The review process should assess the progress of implementation, expenditure and performance indicators of the WLEMP. Where possible, a cost-benefit analysis of implemented actions should be conducted during the review to reflect their cost effectiveness and their contribution to achieving estuary management targets. The development of catchment/estuary functional models configured for the Wallis Lake estuary would greatly assist in the review process by guiding future planning/development activities and would also allow for optimisation assessment of management actions. The revised WLEMP should recognise any decision support tools for management of the Wallis Lake estuary that may not have been available at the time of the initial plan development. 98
Wallis Lake Estuary Management Plan Table 6.1: WLEMP monitoring overview Strategy/Outcome Actions Monitoring and performance indicator Data interpretation Target Comments Progress Minimise stormwater pollutants entering the lake W.1.1, W.1.2, W.1.4, W.1.5, W.1.6 A monitoring program to assess the effectiveness of SQIDs would involve ‘upstream’ and ‘downstream’ sampling of drainage lines. Indicators to be measured include; total nitrogen (TN), total phosphorus (TP), oxidised nitrogen (NOx), ammonia (NH4), filterable reactive phosphate (PO4), dissolved oxygen and turbidity. Replicate samples should be collected during wet weather events when stormwater is flowing. A thresh hold should be decided upon to ensure consistency of the magnitude of the wet weather events ie. 50 mm rain in 24 hours. Samples to be processed at Forster Environmental Laboratory. An example of a monitoring design to assess the effectiveness of artificial wetlands on the K- leg drainage line is given in Fig. 6.1. Each wetland is a replicate unit for water filtration and treatment (n=4). Conventional t-tests or single factor ANOVA could be used to compare upstream and downstream data from one off sampling, or two factor ANOVA could be used to compare upstream and downstream data from multiple sampling events. N/A This monitoring program would allow the cost effectiveness of artificial wetlands to be assessed and would contribute to the management decision-making framework regarding future construction of such SQIDs. Waterwatch sampling is currently active at Forster Keys, Tuncurry Boat Ramp, Darawakh Memorial Park and the Nabiac Weir, Pennington Creek and Dunnes Creek. Sampling is conducted by trained community volunteer groups and coordinated by DIPNR. Indicators measured include; temperature, pH, total dissolved solids, turbidity and dissolved oxygen. Once data is uploaded to the Waterwatch website, graphs are automatically created and displayed allowing a visual interpretation of trends at each site. N/A Data available at www.waterwatch.ns w.gov.au 99
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