United States Department of Transportation
i
Innovative and Integrative Best Management Practices (BMPs) for Surface and Groundwater Protection
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2020-08-01
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[PDF-6.40 MB]
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Edition:Final Report
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Abstract:In this project, development of innovative methods for the integrated evaluation of surface and groundwaters inform practical applications for stormwater best management practices (BMPs) aimed at remediating stormwater nutrient impacts. To explore innovative uses of engineered media, five novel chemically activated media (CAM) were developed and tested for nutrient removal and recovery. Inclusion of bio-sorption activated media (BAM) filters within roadway shoulder vegetated filter strips (VFS) was found to effectively remediate nitrogen when subjected to controlled testing at field scale under a range of hydrologic conditions. The BMP Trains model, widely applied to the permitting, planning, and design of stormwater BMPs, was overhauled to integrate runoff discharged to surface and groundwater, facilitate complex catchment configurations, and ease the user experience, all with continued support of regulatory agencies. Finally, a groundwater flow and nutrient transport model was developed within a region of complex karst hydrogeology and used to explore integrated processes of stormwater runoff, surface water, and groundwater nutrient transport. The modelling study found that the maximum cumulative water quality benefits to Silver Springs from many individual BAM-based BMPs may be negligible. A critical knowledge gap regarding the relative nutrient remediation potential of BAM versus soils of variable properties should be addressed before making investments into BAM-based BMPs.
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