Parramatta River Ryde Sub Catchments

The Parramatta River – Ryde Sub Catchments include Archer Creek, Denistone, Charity Creek, River and Gladesville catchments. All catchments are tributaries of Parramatta River. The total catchments area is approximately 1272 hectares (12.72 square kilometres) and covers the suburbs of Denistone, Melrose Park, Ryde, West Ryde, Melrose Park, Putney, Gladesville and Tennyson Point. The area has a history of damaging floods, most notably in November 1984. 

Council has completed the Parramatta River – Ryde Sub Catchment Flood Study and Floodplain Risk Management Study and Plan, which aims to reduce the flood risks to existing property and future development.

Floodplain Risk Management Study and Plan

The Parramatta River – Ryde Sub Catchments Floodplain Risk Management Plan recommends a series of floodplain management measures to be implemented within the catchments. The Plan is the culmination of a lengthy process. 

The first step was the preparation of a Flood Study to determine the nature and extent of flood problems. A computer model was developed to simulate flood behaviour throughout the study area. The community’s comments on the model’s simulation of the November 1984 and February 1990 flood events were used to fine-tune the model. The model was then used to simulate flood behaviour in ‘design’ events, such as the 100 year flood. 

Second was the preparation of the Floodplain Risk Management Study, which evaluates options for addressing the identified flood problems. The options include measures to modify flood behaviour, measures to reduce the exposure of people and property to floods, and measures to improve people’s response to floods.

View the Study & Plan

View Flood Study Report – 29 August 2013

Provides information on the modelling used in the study.

View Floodplain Risk Management Study and Plan – January 2015

Provides background on the consultation process, a summary of flood behaviour, flood damage assessment, evaluation of floodplain management measures and the resulting recommendations.