HYDRAULIC PERFORMANCE OF PENNSYLVANIA HIGHWAY DRAINAGE INLETS INSTALLED IN PAVED CHANNELS

THE CAPACITIES OF THREE DIFFERENT STANDARD INLETS GRATINGS INSTALLED IN PAVED CHANNELS BY THE PENNSYLVANIA DEPARTMENT OF TRANSPORTATION WERE DETERMINED IN A PAVED DRAINAGE CHANNEL EQUIPPED WITH ADJUSTABLE SLOPES. THE LONGITUDINAL SLOPE RANGED FROM 0.5 PERCENT TO 8 PERCENT; ONE SIDE SLOPE RANGED FROM 48:1 TO 12:1; AND THE OTHER SLOPE WAS AT AN INCLINATION OF EITHER 3:1 OR 1/8:1. THE DRAINAGE INLETS STUDIED WERE (1) TYPE J INLET, (2) TYPE 4-FT. SPECIAL INLET, AND (3) TYPE 6-FT. SPECIAL INLET. MODEL INLETS WERE BUILT TO HALF THE SCALE OF THE ACTUAL INLETS. EACH INLET WAS TESTED UNDER A VARIETY OF CHANNEL CONFIGURATIONS AND WITH A CERTAIN RANGE OF CHANNEL FLOW RATES. THE CAPACITY OF AN INLET WAS DETERMINED BY ACTUAL MEASUREMENTS, AND THUS THE EFFICIENCY OF EACH INLET WAS OBTAINED. A SERIES OF CURVES, RELATING EFFICIENCY TO CAPACITY FOR AN INLET, ARE PRESENTED IN THE STUDY. THE CURVES SHOW THAT AS MORE WATER FLOWS IN THE CHANNEL TOWARD AN INLET THE EFFICIENCY OF THE INLET DECREASES. /FHWA/

  • Supplemental Notes:
    • Contract No PENN DOT 68-31 Rept No 364.2
  • Corporate Authors:

    Lehigh University

    Department of Civil Engineering
    Bethlehem, PA  United States  18015
  • Authors:
    • Yee, P P
    • Graf, W H
    • Brune, A W
  • Publication Date: 1972-11

Media Info

  • Pagination: 82 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00233754
  • Record Type: Publication
  • Source Agency: Pennsylvania Department of Transportation
  • Report/Paper Numbers: Inter Rept
  • Files: TRIS, STATEDOT
  • Created Date: Dec 22 1973 12:00AM