Effective Post-Construction Best Management Practices (BMPs) to Infiltrate and Retain Stormwater Runoff

2017Final report: 2/1/14 - 6/30/17PDFTech ReportFHWA-ICT-17-011ICT-17-015UILU-ENG-2017-2015R27-141Best practicesConstruction managementInfiltrationManagementRunoffStormwater volume reductionBioswaleInfiltration trenchVegetated filter stripBMP performanceBMP costMaintenanceConstructionfield performancelinear BMPsUnited StatesIllinoisIllinois Center for TransportationOsouli, AbdolrezaGrinter, MarkZhou, JianpengAhiablame, LaurentStark, Timothy D.Southern Illinois University-Edwardsville. Dept. of Civil EngineeringIllinois. Dept. of Transportation. Bureau of Materials and Physical ResearchUnited States. Federal Highway AdministrationAltstetter, PattyUS Transportation CollectionPerformance analyses of newly constructed linear BMPs in retaining stormwater run-off from 1 in. precipitation in post-construction highway applications and urban areas were conducted using numerical simulations and field observation. A series of simulations were conducted using an idealized catchment on a four-lane highway located on sites with soil types ranging from clayey to sandy material across state of Illinois. The use of turfgrasses and prairie grass vegetative surface covers in pre-BMP scenarios in promoting infiltration and reducing stormwater run-off were investigated. Three types of BMPs\u2014bioswale, infiltration trench, and vegetated filter strips\u2014as well as combinations thereof, were studied for determining their ability to control stormwater run-off in an idealized catchment. This report also documents the maintenance cost, construction cost, and life-cycle analyses of those BMPs to identify cost-effective solutions. The effects of erosion and a sediment accumulation rate of 1 t/ac/y on BMPs during the 2- year and 10-year lifespans of bioswales and infiltration trenches were studied using full-scale field tests. The simulation and field test results provide insight for developing guidelines for cost-effective BMPs to control stormwater run-off in linear projects