Eurobodalla Integrated Water Cycle Management Strategy

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Eurobodalla Integrated Water Cycle Management Strategy
Water Infrastructure Performance Issues
Water Supply
Narooma town reservoir does not have sufficient capacity to supply future peak day
demands in isolation, however the North Narooma Reservoir has sufficient capacity to
supply both North Narooma and Narooma.
Sewage
Pump stations 4,5,19 are prone to surcharge during power outages and some pump
stations may need upgrading to cope with future growth. The Kianga STP is predicted to
reach its design capacity in 2011. Odour from the pump stations has historically been an
issue. The system has recently been upgraded with biological deodorisation beds, which
appears to have addressed the issue, although the system has not yet undergone a holiday
loading since their construction.
Stormwater
The stormwater generated in Narooma is expected to carry 7.6 tonnes per annum of
nitrogen and 1.20 tonnes per annum of phosphorous. These nutrients have the potential to
affect the health of Wagonga Inlet and the surrounding waterways.
9.12.3 How Do We Fix these Issues?
Overview
There are a number of opportunities to manage the water cycle of the towns of Dalmeny
Kianga and Narooma and the surrounding landscape. The traditional approach to water
management is to separate water, wastewater and stormwater and treat each in isolation.
In this plan, all available opportunities have been identified and coarse screened (see
Appendix C). The coarse screening process recognises that there are immediate and short
term measures, and medium to long term water cycle management opportunities. The
immediate and short term measures need to be implemented as a matter of priority to
achieve legislative compliance and best practice standards. The short-listed medium to
long term water cycle management opportunities would in the long run deliver water cycle
sustainability, public health protection and improved service standards.
Immediate Measures
To reduce the risk of potential overflows one of the following strategies may be employed;
Provide additional storage at the critical pump stations and/or,
Ensuring a more reliable main power supply system or stand-by power.
Short term Measures
The short term measures include:
Expanding the simple data management system into a comprehensive Shire wide
system to record and store operational and performance monitoring information.
Initiating regular and systematic monitoring of operational parameters such as daily
water use, sewage flows, water quality etc and more strategic environmental and
social parameters.
Establishing a water supply reticulation network model to confirm pressure and
firefighting service standards.