Feasibility of integrating natural and constructed wetlands in roadway drainage system design.

Details

• Creators:
  Stansbury, John ; Moussavi, Massoum ; Zhang, Tian
• Corporate Creators:
  University of Nebraska--Lincoln. Dept. of Civil Engineering
• Corporate Contributors:
  Nebraska. Dept. of Roads
• Subject/TRT Terms:
  • Runoff
  • Drainage
  • Surface drainage
  • Detention basins
  • Best practices
  • Wetlands
• Publication/ Report Number:
  SPR-1(09) P235
• Resource Type:
  Tech Report
• Geographical Coverage:
  Nebraska
• Corporate Publisher:
  Nebraska. Dept. of Roads
• Abstract:
  "Stormwater from roadways could have negative effects on the environment and aquatic ecosystems. Typical highway ; runoff pollutants include solids; heavy metals, particularly cadmium, copper, and zinc; petroleum hydrocarbons; gasoline ; constituents; PAHs (polyaromatic hydrocarbons); oxygen demanding compounds measured as COD (chemical oxygen ; demand) and BOD (biochemical oxygen demand); and road salts. Roadway runoff falls under the legislation of the Clean ; Water Act (CWA) via the National Pollutant Discharge Elimination System (NPDES). CWA regulates discharge of ; nonpoint source pollutants, such as roadway runoff, by issuing permits to public entities which manage Municipal Separate ; Storm Sewer Systems (MS4s). The objectives of volume I of this research were to characterize the pollutants in roadway ; runoff and determine the effectiveness of the existing stormwater BMPs at the study site. To accomplish these objectives, ; eleven rainfall events were sampled from November 2008 through November 2010. The objective of volume II was to ; fulfill the NDOR permitting requirement of creating a design guide for BMPs to remediate roadway runoff in Nebraska. ; BMPs which were most applicable to treating roadway runoff were those which removed 80% of the total solid load in the ; runoff, reduced metal concentrations to below acute toxicity levels, had low maintenance burden, were cost effective, did ; not pose a safety hazard to motorists, could be implemented within the right-of-way, did not negatively impact the road ; subgrade, and were aesthetically pleasing. The BMPs which best fit these criteria were vegetated filter strips, vegetated ; swales, bioretention, sand filters, and horizontal filter trenches. In this study fact sheets and design guides were compiled ; for each of these BMPs. The fact sheet provides background on the BMP including cost considerations, siting constraints, ; and predicted maintenance requirements. The design guide provides the process for sizing the BMP, design criteria the ; BMP must meet, and a design example which goes through the design process for a hypothetical application."
  More +
• Format:
  PDF
• Funding:
  P325
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/25285/dot_25285_DS1.pdf
• File Type:
  [PDF - 7.51 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:d3a8244b29cad07a702595f91ee0c985b81c0171ec5badb03e4f90b9fda8a07ecb5b4a06dbe0bc5a780b88ce8590dc95b152831a87786cf80e68e741798f5d74