Next Article in Journal
Sustainable Ice-Jam Flood Management for Socio-Economic and Socio-Ecological Systems
Next Article in Special Issue
Effect of Saturated Zone on Nitrogen Removal Processes in Stormwater Bioretention Systems
Previous Article in Journal
Determining Surface Infiltration Rate of Permeable Pavements with Digital Imaging
Previous Article in Special Issue
Cross-Analysis of Land and Runoff Variations in Response to Urbanization on Basin, Watershed, and City Scales with/without Green Infrastructures
Article Menu
Issue 2 (February) cover image

Export Article

Open AccessCase Report
Water 2018, 10(2), 134; https://doi.org/10.3390/w10020134

Evaluating the Water Quality Benefits of a Bioswale in Brunswick County, North Carolina (NC), USA

1
Department of Biological and Agricultural Engineering, North Carolina State University, Raleigh, NC 27695, USA
2
Department of Food, Agricultural, and Biological Engineering, Ohio State University, Columbus, OH 43210, USA
3
North Carolina Department of Transportation, Raleigh, NC 27610, USA
4
AECOM, Morrisville, NC 27560, USA
5
Department of Coastal and Marine Systems Science, Coastal Carolina University, Conway, SC 29528, USA
*
Author to whom correspondence should be addressed.
Received: 28 November 2017 / Revised: 19 January 2018 / Accepted: 26 January 2018 / Published: 31 January 2018
(This article belongs to the Special Issue Sponge Cities: Emerging Approaches, Challenges and Opportunities)
View Full-Text   |   Download PDF [4378 KB, uploaded 31 January 2018]   |  

Abstract

Standard roadside vegetated swales often do not provide consistent pollutant removal. To increase infiltration and pollutant removal, bioswales are designed with an underlying soil media and an underdrain. However, there are little data on the ability of these stormwater control measures (SCMs) to reduce pollutant concentrations. A bioswale treating road runoff was monitored, with volume-proportional, composite stormwater runoff samples taken for the inlet, overflow, and underdrain outflow. Samples were tested for total suspended solids (TSS), total volatile suspended solids (VSS), enterococcus, E. coli, and turbidity. Underdrain flow was significantly cleaner than untreated road runoff for all monitored pollutants. As expected, the water quality of overflow was not significantly improved, since little to no interaction with soils occurred for this portion of the water balance. However, overflow bacteria concentrations were similar to those from the underdrain perhaps due to a first flush of bacteria which was treated by the soil media. For all sampling locations, enterococci concentrations were always higher than the USEPA geometric mean recommendation of 35 Most Probable Number (MPN)/100 mL, but there were events where the fecal coliform concentrations was below the USEPA’s 200 MPN/100 mL limit. A reduction in TSS concentration was seen for both overflow and underdrain flow, and only the underdrain effluent concentrations were below the North Carolina’s high quality water limit of 20 mg/L. Comparing results herein to standard swales, the bioswale has the potential to provide greater treatment and become a popular tool. View Full-Text
Keywords: bacteria; bioinfiltration; infiltration; pathogens; runoff; sediment; urbanization bacteria; bioinfiltration; infiltration; pathogens; runoff; sediment; urbanization
Figures

Figure 1

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).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Purvis, R.A.; Winston, R.J.; Hunt, W.F.; Lipscomb, B.; Narayanaswamy, K.; McDaniel, A.; Lauffer, M.S.; Libes, S. Evaluating the Water Quality Benefits of a Bioswale in Brunswick County, North Carolina (NC), USA. Water 2018, 10, 134.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Water EISSN 2073-4441 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top