PHYSICAL CHARACTERISTICS OF URBAN ROADWAY SOLIDS TRANSPORTED DURING RAIN EVENTS

Urban stormwater runoff from paved surfaces transports a wide gradation of solids ranging in size from smaller than 1 micrometer to greater than 10,000 micrometers. This study measured physical characteristics of solids transported in lateral pavement sheet flow (LPSF) from a heavily traveled roadway in Cincinnati, Ohio. Particles smaller than 25 micrometers were counted and sized using a light obscuration particle counter. Particles larger than 25 micrometers were separated mechanically to generate particle size distributions. Solids in the 2-8 micrometer range generated the largest counts and were rapidly washed from the pavement. LPSF rate and duration controlled yield and size of transported solids. Particle transport was mass limited during long duration high intensity events, but flow limited during intermittent low intensity events with high traffic. Particle counts exhibited a first flush from the pavement. Specific surface area generally increased with decreasing particle size, but measured values deviated from the monotonic pattern expected for spherical particles. Particles 425-850 micrometers in size contributed the greatest total surface area. Results provide guidance for assessment of the impact of urban runoff water quality and for design of in situ treatment strategies.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/8675387
• Supplemental Notes:
  • This work was supported by the Ohio Department of Transportation under research grant no. 8147 (a subcontract from the Federal Highway Administration) and by National Science Foundation award BCS-9257608.
• Corporate Authors:

  American Society of Civil Engineers

  345 East 47th Street
  New York, NY  United States  10017-2398
• Authors:
  • Sansalone, J J
  • Koran, J M
  • Smithson, J A
  • Buchberger, S G
• Publication Date: 1998-5

Language

• English

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: p. 427-440
• Serial:
  • Journal of Environmental Engineering
  • Volume: 124
  • Issue Number: 5
  • Publisher: American Society of Civil Engineers
  • ISSN: 0733-9372
  • Serial URL: http://ojps.aip.org/eeo

Subject/Index Terms

• TRT Terms: Field tests; Hydrology; Pavements; Physical properties; Rain; Runoff; Sewage treatment; Solids; Storms; Surfaces; Urban areas; Urban highways; Water quality
• Uncontrolled Terms: Particle size distribution; Surface area
• Geographic Terms: Cincinnati (Ohio)
• Old TRIS Terms: Lateral pavement sheet flow; Water treatments
• Subject Areas: Highways; Hydraulics and Hydrology; Pavements; I26: Water Run-off - Freeze-thaw;

Filing Info

• Accession Number: 00749275
• Record Type: Publication
• Contract Numbers: 8147, BCS-9257608
• Files: TRIS
• Created Date: May 29 1998 12:00AM