Work

Effects of Stormwater Green Infrastructure on Watershed Outflow: Does Spatial Distribution Matter?

Year: 2019

Type: article

Abstract: Green Stormwater Infrastructure (GSI) has become a popular method in urban stormwater management. We examined how spatial distribution of GSI affected rainfall-runoff relationships in a recently developed neighborhood in Gresham, Oregon, USA for the 2017-2018 water year. Runoff ratio, peak discharge, and flashiness were compared under four precipitation scenarios (of differing intensity and duration) and different spatial arrangements of GSI. Distributed GSI reduced runoff ratio (10 - 20%), peak discharge (26 - 68%), and flashiness index (56 - 70%). Distributed GSI outperformed centralized structures for all metrics, reducing runoff ratio (22 - 32%), peak discharge 67 to 69%, and flashiness index (32 - 62%). This research serves as a basis for urban stormwater managers to understand potential impact of GSI on reducing runoff and downstream flooding in small urban watersheds with frequent rain.

Source: International Journal of Geospatial and Environmental Research

Authors: Benjamin Fahy, Heejun Chang

Language: English

Topic: Urban Stormwater Management Solutions

Subfield: Environmental Engineering

Field: Environmental Science

Domain: Physical Sciences

SDGs: Sustainable cities and communities, Clean water and sanitation

Open Access status: hybrid

Funder: National Science Foundation

Award: Urban resilience to extreme weather related events

OpenAlex ID: W2979876345

FWCI: 0.799

Cites: 44

Cited by: 15

Related to: 10