Abstract
The Sydney Harbour waterway modelling suite examines the changes in water quality in the harbour estuary and its tributaries associated with stormwater runoff and wet weather sewage overflows from the upstream catchments, in Sydney Australia. This paper discusses the development and performance of the numerical models. The models have been used to investigate the spatial variability of catchment pollutant loads and the impacts of sewer overflows on the water quality in the Sydney Harbour estuary. The scenario modelling results demonstrate that sewer overflows have a minimal impact on the Sydney Harbour estuary water quality, with stormwater dominating most changes in water quality.
Highlights
Sydney Water is Australia’s largest water utility, supplying water, wastewater, recycled water and some stormwater services to more than five million people
The Sydney Harbour estuary received 70% of stormwater discharge volume from the estuary catchments, 18% from the Upper Parramatta River and 8% from the Upper Lane Cove River
Dry weather concentrations associated with land use for catchments
Summary
Sydney Water is Australia’s largest water utility, supplying water, wastewater, recycled water and some stormwater services to more than five million people.
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