Journal article
A study of hydraulic dynamics in vegetated and non-vegetated biorention mesocosms
Proceedings of the Seventh International Conference on Hydroscience and Engineering
17 Apr 2007
Abstract
Bioretention systems are stormwater treatment devices installed to remove both dissolved and particulate pollutants. As stormwater percolates through the bioretention system, dissolved pollutants are removed from solution by chemical and biological processes. In our study, 20 bioretention mesocosms (10 with loamy sand and 10 with sandy loam, half with and half without vegetation) were used to investigate hydraulic behavior. The mesocosms were dosed with 120L to 160L synthetic stormwater over 3h to 5h. The infiltration and percolation rates in the sand was rapid (>15 cm-h-1), while rates in the loam were much less (2-3 cm-h-1). Retention time in the sand was 1.5h while that in the loam was well over 10h. Vegetated systems had better percolation rates than the non-vegetated systems. Constriction of outlets rapidly affected infiltration rates. The infiltration and percolation response of the bioretention systems was evaluated in terms of the Green-Ampt equation, as affected by soil properties and vegetation. Implications for the design of bioretention facilities are then discussed.
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Details
- Title
- A study of hydraulic dynamics in vegetated and non-vegetated biorention mesocosms
- Creators
- William C. Lucas (Author) - Drexel University (1970-)Margaret Greenway (Author) - Drexel University (1970-)
- Publication Details
- Proceedings of the Seventh International Conference on Hydroscience and Engineering
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- DU; College of Engineering; Civil, Architectural, and Environmental Engineering
- Identifiers
- 991014632555504721