DEPTH OF FLOW AS A DESIGN CRITERION FOR CHANNELS WITH ARTIFICIAL LINERS
SIX ARTIFICIAL LINERS WERE INVESTIGATED TO DEVELOP DESIGN CRITERIA FOR ERODIBLE CHANNELS. LINERS INSTALLED ON FLAT-BOTTOM EARTH CHANNELS, 2 FT WIDE, 60 FT LONG, AND ON SLOPES UP TO 0.125 WERE SUBJECTED TO INCREASING FLOWS TO CHANNEL FAILURE. TEST SECTIONS OF SAND TO HEAVY CLAY WERE INSERTED IN THE CHANNEL FLOOR AND THE EFFECTIVENESS OF THE LINERS OBSERVED. MEASUREMENTS CONSISTED OF FLOW RATES, CHANNEL AND WATER SURFACE PROFILES, AND TEST SECTION EROSION. FOR EACH FLOW RATE, VALUES WERE DETERMINED FOR DEPTH OF FLOW, MEAN VELOCITY, HYDRAULIC RADIUS, SLOPE, AND EROSION. FAILURE OF THE TEST SECTIONS AND LINERS WAS NOTED. A REGRESSION ANALYSIS WAS USED TO FIT THE DATA FOR EACH LINER TO LOG V= LOG A + B LOG R + C LOG S. A HIGH CORRELATION OF VARIABLES WAS OBTAINED. THE COEFFICIENT AND EXPONENTS FOR THIS FORMULA ARE INCLUDED. MAXIMUM PERMISSIBLE DEPTH (A CRITERION EXPRESSING FAILURE) WAS CONSIDERED TO BE A FUNCTION OF SLOPE. THESE VARIABLES WERE EXAMINED IN A DEPTH-SLOPE PLOT WITH UPPER AND LOWER PARALLEL LIMITS WHICH REFLECT THE EROSION CHARACTERISTICS OF THE TEST SOILS. THE DEPTH CRITERION, ALONG WITH THE FLOW RATING CURVES, CAN BE APPLIED TO THE DESIGN OF ARTIFICIALLY LINED CHANNELS OF ANY SHAPE. /AUTHOR/
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Supplemental Notes:
- Paper sponsored by Committee on Surface Drainage of Highways and presented at the 48th Annual Meeting. 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.
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Authors:
- Mcwhorter, J C
- Carpenter, T G
- CLARK, R N
- Publication Date: 1969
Media Info
- Media Type: Digital/other
- Features: Figures; References;
- Pagination: pp 18-24
- Monograph Title: Surface drainage of highways
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Serial:
- Highway Research Record
- Issue Number: 261
- Publisher: Highway Research Board
Subject/Index Terms
- TRT Terms: Channel linings; Clay; Dense soils; Depth; Design; Erosion; Flow measurement; Hydraulic properties; Regression analysis; Sand; Scour; Slopes; Soils; Test sections; Velocity
- Uncontrolled Terms: Design criteria; Water surface profiles
- Old TRIS Terms: Heavy soils; Hydraulic radius
- Subject Areas: Data and Information Technology; Design; Geotechnology; Highways; Hydraulics and Hydrology;
Filing Info
- Accession Number: 00204219
- Record Type: Publication
- Files: TRIS, TRB
- Created Date: Aug 4 1994 12:00AM