# IWM 1.1 - Stormwater Management Strategy (SWMS)
# Applies to
All subdivisions
# Relevant Victoria Planning Provisions
# Clause 56
# 56.05-1 Integrated urban landscape objectives (opens new window)
To provide for integrated water management systems and contribute to drinking water conservation.
# 56.07-4 Stormwater Management objectives (opens new window)
To minimise damage to properties and inconvenience to residents from stormwater.
To ensure that the street operates adequately during major storm events and provides for public safety.
To minimise increases in stormwater and protect the environmental values and physical characteristics of receiving waters from degradation by stormwater.
To encourage stormwater management that maximises the retention and reuse of stormwater.
To encourage stormwater management that contributes to cooling, local habitat improvements and provision of attractive and enjoyable spaces.
See Standard C25 for detailed measurable standard
# Other relevant clauses
# 19.03-3S Integrated water management (opens new window)
# 15.01-3S Subdivision design (opens new window)
# 13.01-1S Natural hazards and climate change (opens new window)
# Summary
# Better practice
Awarded where a Stormwater Management Strategy (SWMS) is submitted upfront, showing how Water Sensitive Urban Design (WSUD) measures respond to site conditions such as slope and topography.
The strategy should align with any relevant Precinct Structure Plan (PSP) requirements and local council or water authority policies, including Integrated Water Management (IWM) strategies.
MUSIC or other relevant stormwater modelling and reference to Urban Stormwater Management Guidance (Publication 1739.1) should be included. A summary of site-specific conditions — such as geology, soils, and groundwater — can also support the strategy, particularly in sensitive areas.
The development may demonstrate how it responds to the EPA’s General Environmental Duty (GED).
# Documentation & evidence required
# Stormwater Management Strategy
- Submission of MUSIC or other stormwater modelling file