# IWM3.1c IWM innovation - 'Sponge city' principles
# Applies to
All subdivisions
# Objective
To sustainably manage water supply and demand, water resources, wastewater, drainage and stormwater through an integrated water management approach that prioritises nature-based solutions, visible stormwater treatment, ecological outcomes, and multifunctional urban landscapes.
# Summary
Excellence is demonstrated where the development aligns with sponge city principles, as outlined in the Stormwater Management Strategy (SWMS) or Integrated Water Management (IWM) Plan. This includes retaining, slowing, and reusing water through visible WSUD assets like swales, wetlands, and rain gardens to support biodiversity, amenity, and urban cooling. Opportunities to integrate stormwater harvesting into open space or sports fields may further enhance outcomes.
# Documentation & evidence required
- Landscape Masterplan: 'IWM overlay to landscape plan demonstrating how sponge city principles are incorporated