Hydraulic efficiency of grate and curb-opening inlets under clogging effect.

Details

• Creators:
  Guo, James C.Y. ; MacKenzie, Ken
• Corporate Creators:
  University of Colorado at Denver
• Corporate Contributors:
  Colorado. Dept. of Transportation. Research Branch ; United States. Federal Highway Administration
• Subject/TRT Terms:
  • Grates
  • Drainage structures
  • Curbs
  • Culvert inlets
  • Hydraulic structures
  • Hydraulic properties
  • Hydraulics
  • Bar grate inlets
  • Vane grate inlets
  • Curbopening inlets
  More +
• Publication/ Report Number:
  CDOT-2012-3
• Resource Type:
  Tech Report
• Geographical Coverage:
  Colorado
• Corporate Publisher:
  Colorado. DTD Applied Research and Innovation Branch
• Abstract:
  The goal of this project is to investigate the hydraulic efficiencies of Type 13 (bar inlets), Type 16 ; (vane inlets), and Type R (curb-opening inlets) for street and roadway drainage. Although these inlets ; have been widely used in many metropolitan areas, the design empirical formulas and coefficients have ; not been verified. In this study, a flume was constructed in the laboratory to simulate street gutter ; flows ranging from 6 to 18 inch of flow depths. Type 13, 16, and curb-opening inlet models were built ; using a 1/3 scale to investigate the depth-flow relations under both on-grade and in-sump conditions. It ; was found that the flow interception capacity for a sump inlet is determined by either weir or orifice ; hydraulics, whichever is less for the given flow depth. Two new splash-velocity curves were developed ; to model the street gutter flow around a Type 13 or 16 inlet on a grade. In this study, a decay-based ; clogging factor was developed and recommended for the design of a series of inlets. The clogging ; effect shall be applied to the effective wetted length for an inlet that operates like a weir, or to the ; effective opening area for an inlet that operates like an orifice in a sump.
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• Format:
  PDF
• Funding:
  105.81
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/24517/dot_24517_DS1.pdf
• File Type:
  [PDF - 1.41 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:0d9d4612dae1437f71ceac064ababf221d4e04247efea8b1b165a12d7088f622