Adrienne Aiona and Henry Stevens will present the Collaborative Video “Credits for Stormwater Management: A Survey of North American Cities with a Focus on Portland, OR”.
Adrienne will present Crediting Ecoroofs for Stormwater Management in Portland, OR:
In Portland, Oregon we give 1:1 credit for ecoroofs for stormwater management, however, it is often not feasible to install an ecoroof at 100% coverage. This presentation discusses how ecoroofs fit into Portland’s stormwater management requirements and are a good solution for constrained sites. Case studies illustrate the use of ecoroofs with other stormwater facilities to develop a complete stormwater site design.
Henry will present A Survey of Green Roof Design Criteria Affecting Stormwater Detention and Retention Characteristics:
Portland’s Environmental Services recently completed an informal survey of green roof design criteria to learn whether and how other jurisdictions address stormwater management goals through specifications for the growing media. Media characteristics influencing stormwater detention and retention were the main priority. The intent was to document relevant specifications and requirements, and to learn about any technical rules for how green roofs are given credit for stormwater management. It was a secondary goal to identify whether there is any emerging consensus about how to design green roofs to optimize stormwater management benefits.