Water Management

1 - Water Management

Site Planning

Water Management

All of Parramatta's catchments drain to the Parramatta River, a highly significant tidal estuary in Sydney. To protect this resource, impacts on receiving water quality from further development of the catchments needs to be minimised. Stormwater drainage networks and the floodway capacity of waterways need to be managed whilst preserving/enhancing the ecological integrity of the waterway systems.



Flooding

Objectives
  1. O.1To ensure the proponents of development and the community in general are aware of the potential flood hazard and consequent risk and liability associated with the use and development of flood liable land.
  2. O.2To manage flood liable land in an economically, socially and environmentally sustainable manner.
  3. O.3To ensure building design and siting addresses flood hazard and does not result in adverse flood impact.
  4. O.4To prevent intensification of the development and use of floodways, and wherever appropriate and feasible, allow for their conversion to natural waterway corridors.
Design Principles
  1. P.1Water Sensitive Urban Design principles are to be incorporated into the design of stormwater drainage and in the orientation of development.
  2. P.2Development is to be compatible with any relevant Floodplain Risk Management Plan, Flood Studies, Sub-Catchment Management Plan and any policy or development control plan relating to flood liable land adopted by Council.
  3. P.3Development should not adversely increase the potential flood affectation on other development or properties, either individually or in combination with the cumulative impact of similar development(s) likely to occur within the same catchment.
  4. P.4The impact of flooding and flood liability is to be managed, ensuring the development does not divert the flood waters, nor interfere with floodwater storage or the natural functions of waterways.
  5. P.5Development should not result in significant impacts upon the amenity of an area by way of unacceptable overshadowing of adjoining properties, privacy impacts (e.g. by unsympathetic house-raising) or by being incompatible with the streetscape or character of the locality.
  6. P.6The filling of land up to 1:100 Average Recurrence Interval (ARI) (or flood storage area if determined) is not permitted. Filling of land above 1:100 ARI up to the Probable Maximum Flood (PMF) (or in flood fringe) must not adversely impact upon flood behaviour.

Note: A Site Stormwater Management Plan addressing the above design principles and objectives may be required.

Further Information
  • NSW Government, http://www.dipnr.nsw.gov.au/floodplain.html
  • Flood Risk Management Plans, Flood Studies, Sub-Catchment Management Plans, and Flood Policies available from Council including Parramatta City Council Policy for Development and Building on Floodprone Land (E-5)
  • Water Sensitive Planning Guide - www.wsud.org
  • WSUD Engineering Procedure: Stormwater, Melbourne Water