How to Cite

HYDRODYNAMIC AND WATER QUALITY MODELLING IN SYDNEY HARBOUR. (2020). Coastal Engineering Proceedings, 36v, papers.58. https://doi.org/10.9753/icce.v36v.papers.58


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.


Birch, G.F., Cruickshank, B. and Davis, B. 2010. Modelling nutrient loads to Sydney estuary (Australia), Environmental Monitoring and Assessment 167, 333-348.

Duncan, H. 2006. Urban stormwater pollutant characteristics, Australian Runoff Quality – A guide to Water Sensitive Urban Design, Ed. T.H.F. Wong. Engineers Australia, Published by Engineers Media1 6pp.

King, I.P. 1997. A two-dimensional finite element model for flow in estuaries and streams. Documentation for RMA2, 53pp.

King, I.P. 1997. A three-dimensional finite element model for water quality in estuaries and streams. Documentation for RMA-11. Report prepared by I.P. King.

King, I.P. 2016. A finite element model for stratified flow. Documentation for RMA10. NHMRC (2008). Guidelines for Managing Risks in Recreational Waters, National Health and medical Research Council, Australian Government, pp. 216

Noriasi, DN., Arnold, JG, Van Liew, MW, Bingner, RL, Harmel, RD and Veith, T.L, 2007. Model evaluation guidelines for systematic quantification of accuracy in watershed simulations. Transactions of the American Society of Agricultural and Biological Engineers, 50(3): 885-900.

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