Eurobodalla Integrated Water Cycle Management Strategy

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190 Eurobodalla Integrated Water Cycle Management Strategy Improve current Sewage Treatment System This option involves upgrading the Kianga STP to address the long term odour impacts and to meet operational compliance. Upgrading the plant would include the medium to long term management measures identified above, and pump station improvements. Increase Treatment Capacity Kianga STP requires upgrading to meet future demands. This could be achieved by constructing a parallel treatment facility or by optimising the existing treatment train. Stormwater Quality and Quantity Control measures Stormwater can be collected and stored, and then treated for release at a controlled rate. The temporary storage of flood waters will have the effect of attenuating the peak flow rate of discharge downstream which should reduce the size of drainage works required downstream. It can substantially reduce the release of nutrients and pollutants to the catchment. If sufficient open space is available, retaining and treating stormwater can provide a cost effective means of upgrading stormwater drainage capacities with significant environmental benefits. Stormwater Reuse Stormwater can be collected and stored, and then treated to a suitable level for a variety of uses. Stormwater can be collected through individual rainwater tanks or through detention basins. The temporary storage and reuse of flood waters will have the effect of attenuating the peak flow rate of discharge downstream which should reduce the size of drainage works required downstream. If sufficient open space is available, stormwater retention can provide a cost effective means of upgrading stormwater drainage capacities, and reduce pressure on treated water supplies and waterways. Rainwater tanks can supply many indoor and outdoor domestic uses, and detention basins can be used for open space irrigation or form part of the regional scheme. Table 9-36 Social and Environmental Aspects of the Medium to Long Term Opportunities for Dalmeny, Kianga and Narooma Opportunity Social Environmental Improve current sewage system management Stormwater quality and quantity control measures Reduced potential for odour complaints. Improved efficiency of existing assets Will meet future demand loads Reduces stormwater impacts and flooding. Cost effective means of upgrading stormwater capacities. Help protect oyster industry with improved run-off entering local waterways. Improved public health outcomes Lessened risk of overflow. Limited footprint of construction. Controls pollutants entering the environment. Improves quality of local waterways Reduces erosion from increased run-off. Allows for future reuse opportunities.
Eurobodalla Integrated Water Cycle Management Strategy Stormwater reuse Opportunity Social Environmental Reduces stormwater impacts and flooding. Cost effective means of upgrading stormwater capacities. Help protect oyster industry with improved run-off entering local waterways. Improved public health outcomes 9.12.4 Integrated Water Cycle Management Scenarios Controls pollutants entering the environment. Improves quality of local waterways Reduces erosion from increased run-off. Efficient use of water resources. Reduces pressure on water supply sources for irrigation purposes Using the bundling process, the above water management opportunities can be combined into integrated scenarios. Table 9-37 presents some examples of integrated scenarios. Table 9-37 Integrated Water Cycle Management Scenarios for Dalmeny, Kianga and Narooma Management Option Improve current sewage system management Stormwater quantity and quality control measures for high priority areas Stormwater quantity and quality control measures for low priority areas Stormwater harvesting and reuse for open space, playing fields and golf course irrigation Minimal/ Scenario Traditional 2 3 Minimal/traditional Improve current sewage treatment system and increase treatment capacity. Integrated Scenario 2 Improve current sewage treatment system, increase treatment capacity and incorporate stormwater quality and quantity control measures. Integrated Scenario 3 Improve current sewage treatment system, increase treatment capacity, incorporate stormwater quality and quantity control measures and stormwater reuse. The TBL assessment (Table 9-38) presents the comparative environmental, social and economic benefits of each integrated scenario example. 191
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xviii TABLES Eurobodalla Integrated
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FACT SHEET 3 Rainwater Tanks 18 Eur
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FACT SHEET 9 Loss Reduction 24 Euro
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38 Number of Persons 2,500 2,000 1,
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42 % Occupancy 80% 70% 60% 50% 40%
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46 Annual Volume (ML/Yr) 2,500 2,00
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48 Demand ML/a Eurobodalla Integrat
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6.5.3 Stormwater Issues 58 Euroboda
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8.3.2 Immediate Measures 84 Eurobod
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9.2 South Durras 9.2.1 Background 1
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124 Provision of full reticulated s
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132 Stormwater Eurobodalla Integrat
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