Eurobodalla Integrated Water Cycle Management Strategy

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Eurobodalla Integrated Water Cycle Management Strategy
Table 9-23 Costing of Management Opportunities for Moruya and Moruya Heads
Issues Management
Strategies
Upgrade pump stations
(Underway)
Sewer the industrial
estate (underway)
Lay a re-use pipeline
alongside the sewer
pipeline
Lay a reuse pipe north
Stormwater retention
quality and quantity
control for high priority
areas
Stormwater quality and
quantity control for low
priority areas
Sewage System Upgrade
Social Environmental
Reduced potential for
odour complaints.
Improved efficiency of
existing assets.
Lessened public health
risk.
Economical
Improved use of
valuable resource.
Saving of potable
(costly) treated water.
Eliminates urban
flooding
Eliminates urban
flooding
Lessened risk of
overflow.
Limited footprint of
construction.
Reduced risk of
overflows to sensitive
environment and water
bodies.
Limited footprint of
construction of this
option.
Return of resource to
the water cycle.
Reduces pollution of
waterways
Reduces pollution of
waterways
Financial ($m)
Capital NPV @ 7%
$2.2 $2.3
$1.1 $1.15
$0.40 $42
$0.45k $0.47
$0.056 $0.060
$1.0 $1.1
The existing sewage treatment plant upgrade works were completed last year. The plant
has sufficient capacity for the next 30 years. Some sewer pipes and pump stations required
upgrading to overcome overflow and odour problems. This work is underway.
Stormwater Retention Basins
Stormwater retention basins are designed to collect and store flood run-off 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. Such temporary storage areas are sometimes formed naturally by
restrictions in the drainage systems and may be constructed artificially. If sufficient open
space is available, stormwater retention can provide a cost effective means of upgrading
stormwater drainage capacities.
Effluent Reuse
Wastewater can be treated to a suitable level for a variety of beneficial reuse. These
include industrial, agricultural, open space irrigation, non-potable domestic reuse and
indirect potable reuse. The opportunity exists in the Moruya area to utilise effluent for
agricultural and industrial reuse.
Integrated Water Cycle Management Scenarios
Using the bundling process the above water management opportunities can be combined
into integrated scenarios. The table below presents examples of integrated scenarios.