These documents have been developed to support the uptake of innovative stormwater assets that support flow reduction – a key component of sustainable stormwater management.

They aim to support developers, stormwater practitioners, and councils by:

• Introducing innovative stormwater assets that slow runoff and reduce volume through water harvesting, enhanced evaporation, or infiltration.
• Providing a shared understanding of how these assets function and how they should be modelled and assessed.
• Providing guidance for assessing the volumetric performance of both emerging and existing asset types.