UNVEILING STORMWATER MANAGEMENT: KEY DIFFERENCES BETWEEN GREENFIELD AND BROWNFIELD SITES

R. Kiddle, K. Daniel (Woods)

POSTER ABSTRACT

Greenfield sites generally constitute large green spaces while Brownfield sites are generally located in urban environments. The stormwater management strategy can vary widely based on if the site is either a Greenfields or a Brownfields. Typically, greenfield development holds more opportunities to build resilience when compared to brownfield developments due to the presence of existing infrastructure and buildings.

Ensuring higher water quality standards from a Brownfield site can be challenging because of large existing impervious area while effects of Greenfield site can be managed and mitigated with effective master planning.

For stream hydrology provision, Brownfields site generally proposes new storage devices whereas Greenfields site has more opportunity to develop new green infrastructure and mimic nature on a wider scale.

Brownfield sites generally discharge to existing downstream pipe network. Modifying existing floodplain on Brownfields site can affect existing properties and people as the downstream area is typically urban. Brownfield sites often necessitate the inclusion of proprietary devices to effectively treat contaminated runoff. Greenfields site provides an opportunity to amend the overall masterplan and accommodate flooding with new roads and separate reserves.

Both Brownfield and Greenfield developments must adhere to water quality standards to ensure the protection of ecosystems and public health.