00677735

Component

http://onlinepubs.trb.org...trr/1994/1471/1471-004.pdf

https://scholar.google.co...kiss&publication_year=1994

Draining storm water quickly and efficiently from highways is an essential part of any highway program. Laboratory experiments were conducted to develop curb-opening and grate inlet efficiency curves for the Nebraska standard inlet (single and in series), the city of Lincoln canted inlet, a new grate inlet (single and in series), and an inlet affected by resurfacing. Experiments were performed for the on-grade inlets on a full-scale roadway surface that was treated with sand-imbedded paint to produce an average Manning's n-value of 0.016. The constant longitudinal and cross slopes were 3% and 2%, respectively. Supercritical flow prevailed over the flow range of 0.5 to 5 cu ft/sec. Results show that the Nebraska standard inlet provides about 20% greater efficiency than the equivalent AASHTO-type inlet. Canted inlet performance was only marginally better than that of the Nebraska standard inlet. The new grate inlet performance was very similar to that of curb-opening inlets. Inlets in series increased efficiencies by almost 20% over the efficiencies of single inlets. Finally, roadway resurfacing that covers inlet transitions reduces efficiency by about one-half.

This paper appears in Transportation Research Record No. 1471, Recent Research on Hydraulics and Hydrology. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved

01396802

English

p. 24-30

1994

Transportation Research Record

0309061040

Figures (12) ; References (10)

Curbs; Drainage; Economic efficiency; Grates; Laboratory tests

Efficiency

Economics; Highways; Hydraulics and Hydrology; I26: Water Run-off - Freeze-thaw

TRIS, TRB

May 22 1995 12:00AM

• CORRELATION OF PAVEMENT SURFACE TEXTURE TO HYDRAULIC ROUGHNESS
• DEVELOPING EROSION CONTROL PLANS FOR HIGHWAY CONSTRUCTION
• DEVELOPMENT OF REGIONALIZED CURVES FOR DRAINAGE AREA VERSUS SEDIMENT BASIN SIZE
• FLOOD ANALYSIS IN DUPAGE COUNTY USING HYDROLOGICAL SIMULATION PROGRAM--FORTRAN MODEL
• HYDRAULICS OF SAFETY END SECTIONS FOR HIGHWAY CULVERTS
• HYDROLOGIC ENGINEERING CENTER MODELS FOR URBAN HYDROLOGIC ANALYSIS
• MULTILANE HIGHWAY DESIGN CROSSFALL AND DRAINAGE ISSUES
• SCOUR AROUND WIDE PIERS IN SHALLOW WATER
• SMALL URBAN WATERSHED USE OF HYDROLOGIC PROCEDURES
• URBAN HYDROLOGY DESIGN USING SOIL CONSERVATION SERVICE TR-55 AND TR-20 MODELS