The National Water Commission has defined Urban Integrated Water Cycle Management as:
The integration of water supply, sewerage and stormwater, so that water is used optimally within a catchment resource, state and national policy context. It promotes the coordinated planning, development and management of water, land and relation resources (including energy use) that are linked to urban areas and the application of WSUD principles within the built urban environment.
The National Water Initiative defines water sensitive urban design as:
the integration of urban planning with the management, protection and conservation of the urban water cycle that insures urban water management is sensitive to natural hydrological and ecological cycles.
Water sensitive urban design seeks to achieve better urban water management outcomes through implementation of the following objectives.
Manage catchments to maintain or improve water resources
Manage risks to human life and property
Ensure the efficient use of water resources
Ensure that economic, social and cultural values are recognised and maintained