Eurobodalla Integrated Water Cycle Management Strategy

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Eurobodalla Integrated Water Cycle Management Strategy
Figure 6-14 shows that the northern, southern and central areas are all expected to
experience growing urban water demands, with the northern area likely to be the greatest
contributor to the regional scheme’s demand increases. Similarly, Figure 6-15 shows that
although all regions are expected to experience growing daily water demands, it is the
northern area that is anticipated to experience the greatest rate of increase.
Figure 6-16 shows that as a proportion of total residential demand, flats/units will increase
from 15% to 28% and the separate house demand will decrease from 85% to 72%.
Annual Volume (ML/Yr)
4,500
4,000
3,500
3,000
2,500
2,000
1,500
1,000
500
0
1990
1992
1994
1996
1998
2000
2002
2004
2006
2008
2010
2012
Year
2014
2016
2018
2020
2022
2024
2026
2028
2030
2032
Figure 6-16 Forecast of Regional Schemes Residential Demands
Residential Houses
Holiday Houses
Residential Flats
Holiday Flats
Total
In the absence of specific future development proposals it has been assumed that
commercial and institutional water use will increase in line with residential demand. Further,
the above forecasts assume that non-metered usage will remain steady at about
67 L/d/capita. Non-metered usage is the difference between total supply and total metered
consumption. It comprises:
Meter inaccuracy
Authorised non-metered usage
Leakage
Breaks, and
Regular mains flushing to maintain the integrity of the delivery and distribution
system.
Urban Water Discharge
In the next three decades wastewater produced by the shire’s urban community is expected
to increase by 30% from 4 500 ML/a to 5 850 ML/a. It is expected that the average daily
wastewater volume to be treated in the future by the seven treatment plants will be
approximately 11.2 ML/d, with an increase of approximately 20% during the peak
holiday/tourist season. Based on current information, it is expected that about 5 150 ML/a
(88%) of the future wastewater flow would be treated at the seven treatment plants in
Eurobodalla to a secondary standard before discharge to the environment. The expected
increase in wastewater production requires appropriate management to ensure that the
local environment and community health is not compromised. The opportunities available to
further enhance the quality of the secondary treated effluent to increase its beneficial reuse
is discussed in part C. Also discussed in part C is the best practice management and
treatment standards for wastewater produced in the unsewered villages.