Click the photograph for a enlarged view
|
Future Developments
It is difficult to predict future discharges from the
deepwater outfalls although it is apparent that:
-
Further
upgrades at North Head, Bondi and Malabar sewage treatment plants are
expected to remove 65% of solids entering the plants within the next 10
years (Sydney Water 1996). Current removal rates are approximately 50%
(EPA, 1996a).
-
Redirecting
overflows from the Northern Suburbs Ocean Outfall System into a
storage/transport tunnel by 2000 would increase
the total discharge through the deepwater outfall at North Head by 0.5 –
2 % on an annual average and less than 2.5 times the flow in a day of very
heavy rainfall (NSW Gov. 1997).
-
Sewer
mining of the Georges River system may reduce
flows to Malabar STP by 25% by 2010 (NSW Gov. 1997).
-
The
Sydney Water Board (Corporatisation) Act 1994 places great emphasis on
re-use and reducing the
discharges of sewage to waterways including from ocean outfalls.
|
