2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/23/2019 | 2:00 PM - 2:15 PM | TRACKING STREAMFLOW CHANGE FROM SUBURBAN DEVELOPMENT AND GREEN STORMWATER INFRASTRUCTURE | 151 DEF
TRACKING STREAMFLOW CHANGE FROM SUBURBAN DEVELOPMENT AND GREEN STORMWATER INFRASTRUCTURE
Green stormwater infrastructure implementation in urban watersheds has outpaced our understanding of the effectiveness of these practices on streamflow response to precipitation events. Long-term monitoring of experimental urban watersheds in Clarksburg, Maryland, where a high density of infiltration-focused control measures were implemented during development, provides an opportunity to explore how green stormwater infrastructure affects streamflow patterns on a storm-event scale. We used a before-after-control-reference-impact approach to directly compare event-based hydrograph characteristics before, during, and after watershed development with green stormwater infrastructure, such as treebox filters, rain gardens, and infiltration trenches. Two suburban watersheds with green stormwater infrastructure were compared to an urban control watershed and a forested control watershed. Streamflow and precipitation were monitored at 5- or 15-minute intervals from October 2004 through September 2018 and used to characterize peak flows, water yield, and runoff ratios. The two green stormwater infrastructure watersheds had varying degrees of changes to peak flow, water yield, and runoff ratio during the monitoring period. Generally, streamflow metrics from the green stormwater infrastructure watersheds were lower than the urban control, but greater than the forested control.
- Landuse
- Urban
- Flood
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Presenters/Authors
Kristina Hopkins
(), U.S. Geological Survey, khopkins@usgs.gov;
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Aditi Bhaskar
(), Colorado State University, aditi.bhaskar@colostate.edu;
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Sean Woznicki
(), U.S. Environmental Protection Agency, Woznicki.Sean@epa.gov ;
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