Eurobodalla Integrated Water Cycle Management Strategy

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Eurobodalla Integrated Water Cycle Management Strategy
Essential areas (for reasons such as public health) with the concurrence of the
Water and Waste Manager.
Spring loaded taps are to be installed at boat ramps.
Micro irrigation systems and hand-held hoses for garden watering and other external uses
including motor vehicle, boat washing and supply to private swimming pools are restricted
to a total of a 60-minute period between the hours of 6.00am and 8.00am or 5.00pm and
8.00pm daily. Hand-held hoses are to be limited to one hose per property, and washing
down of driveways and footpaths is not permitted, except by bucket.
Businesses such as car yards, public passenger bus services, taxi companies and other
organisations, required under regulations of the RTA to keep vehicles in a clean state, are
restricted to washing vehicles between the hours of 10.00am and 12 noon daily.
Level 3 Restrictions
Level 3 restrictions are implemented when water can only be drawn from Deep Creek Dam
and its storage level falls below 50% by volume.
The restrictions are as per Level 2 with the permitted time reduced to a total of 30 minutes
between the hours of 6.00am and 8.00am or 5.00pm and 8.00pm. Permissible days are
reduced to Tuesdays, Thursdays, Saturdays and Sundays.
Businesses such as car yards, public passenger bus services, taxi companies and other
organisations, required under regulations of RTA to keep vehicles in a clean state, are
restricted to washing vehicles between the hours of 10.00am and 12 noon daily on
Mondays, Wednesdays and Fridays.
Level 4 Restrictions
Level 4 restrictions are implemented when water can only be drawn from Deep Creek Dam
and its storage level falls below 40% by volume.
There is a complete ban on the use of running hoses or taps for any external purpose, with
no exemptions. Water is available for domestic use only and essential areas (for reasons of
public health).
Restrictions after the Drought has Broken
The restrictions will remain in force depending on the storage levels in Deep Creek Dam to
allow the water supply system to replenish the dam at maximum capacity.
1. Deep Creek Dam volume is less than 50% - Level 2 restrictions to be applied.
2. Deep Creek Dam volume is between 50% and 70% - Level 1 restrictions to be
applied.
3. Deep Creek Dam volume in excess of 70% and level rising - no restrictions to be
applied.
Modelling of the Regional Scheme
The regional scheme was modelled using the last 104 years of daily stream flow sequence
up to 2001, the above security of supply criteria and the current supply extraction licence
conditions. The modelling shows that the existing supply infrastructure can maintain an
annual supply of 8 200 ML/a (i.e. secure yield of 8 300 ML/a). This supply rate is far in
excess of the current annual demand of 5 300 ML, however Council’s operating strategy
limits run-of-river pumping during turbid stream flow periods (as this results in water being
supplied to the consumer that does not meet the ADWG for turbidity). This limitation on