The Marrickville Valley catchment comprises a 7.9 square kilometre catchment which ultimately drains into the Cooks River via four outfalls; Eastern Channel, Central Channel, Western Channel and the Malakoff Tunnel (Western Channel Amplification). The objectives of the Floodplain Risk Management Plan are to:
- Reduce the flood hazard and risk to people and property in the existing community and to ensure future development is controlled in a manner consistent with the flood hazard and risk (taking into account the potential impacts of climate change);
- Reduce private and public losses due to flooding;
- Where possible, protect and enhance the creek and floodplain environment;
- Be consistent with the objectives of relevant state policies, in particular, the Government’s Flood Prone Lands and State Rivers and Estuaries Policies and satisfy the objectives and requirements of the Environmental Planning and Assessment Act 1979;
- Be consistent with the objectives of Marrickville Strategy for a Water Sensitive Community and Stormwater Assets Management Plan;
- Ensure actions arising out of the draft plan are sustainable in social, environmental, ecological and economic terms;
- Ensure that the floodplain risk management plan is fully integrated with the local emergency management plan (flood plan) and other relevant catchment management plans; and
- Establish a program for implementation and mechanism for the funding of the plan which should include priorities, staging, funding, responsibilities, constraints, and monitoring.