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Infrastructures 2017, 2(4), 12;

Performance of Two Bioswales on Urban Runoff Management

Department Land, Air, and Water Resources, University of California Davis, Davis, CA 95616, USA
USDA Forest Service, Urban Ecosystems and Social Dynamics Program, PSW Research Station, Albany, CA 95618, USA
Department of Environmental Toxicology, University of California Davis, Davis, CA 95616, USA
Author to whom correspondence should be addressed.
Received: 22 July 2017 / Revised: 15 September 2017 / Accepted: 24 September 2017 / Published: 27 September 2017
(This article belongs to the Special Issue Green Infrastructure for Sustainable Stormwater Management)
PDF [1048 KB, uploaded 27 September 2017]


This study evaluated the effectiveness of two bioswales eight years after construction in Davis, California. The treatment bioswale measured 9 m × 1 m × 1 m (L × W × D). Engineered soil mix (75% native lava rock and 25% loam soil) replaced the native loam soil. Four Red Tip Photinia (Photinia × fraseri Dress) trees and two Blueberry Muffin Hawthorn (Rhaphiolepis umbellata (Thunb.) Makino) shrubs were planted in the bioswale. Runoff flowed into the bioswale from an adjacent 171 m2 panel of turf grass. An identically sized control bioswale consisting of non-disturbed native soil was located adjacent to the treatment bioswale. Surface runoff quantity and quality were measured during three experiments with different pollutant loads. When compared to the control, the treatment bioswale reduced surface runoff by 99.4%, and reduced nitrogen, phosphate, and total organic carbon loading by 99.1%, 99.5%, and 99.4%, respectively. After eight years, tree growth characteristics were similar across both sites. View Full-Text
Keywords: bioswale; engineered soil mix; urban runoff; water quality; urban forest bioswale; engineered soil mix; urban runoff; water quality; urban forest

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Xiao, Q.; McPherson, E.G.; Zhang, Q.; Ge, X.; Dahlgren, R. Performance of Two Bioswales on Urban Runoff Management. Infrastructures 2017, 2, 12.

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