BRIDGE BACKWATER IN WIDE VALLEYS

A METHOD IS PRESENTED FOR CALCULATING THE LONGITUDINAL WATER SURFACE PROFILE IN THE REACH OF A RIVER IN FLOOD WHICH IS DISTRUBED BY THE PRESENCE OF THE BRIDGE AND EMBANKMENT FILL. A VARIETY OF PROFILES ARE FOUND TO BE POSSIBLE DEPENDING ON THE ABSTRACTION, OR ACCRETION, RATE AND THE RESISTANCE TO FLOW. BECAUSE THE FLOW ON THE FLOODPLAIN IS CONCENTRATED BY THE VALLEY CROSSING, BACKWATER IS POSSIBLE DOWNSTREAM FROM THE BRIDGE AS WELL AS UPSTREAM. THUS, THE FLOW MOVING TO AND FROM THE CHANNEL WELL UPSTREAM AND DOWNSTREAM OF THE BRIDGE MUST BE CONSIDERED AND PROPERLY ANALYZED IN PREDICTING THE BACKWATER PROFILE THROUGH THE BRIDGE ALONG THE CENTER LINE OF THE CHANNEL. IMPROVEMENTS AND REFINEMENTS ON THE SIMPLE CALCULATION PROCEDURES PRESENTED WILL DEPEND ON FIELD MEASUREMENTS AND LABORATORY OBSERVATIONS. /AUTHOR/

• Supplemental Notes:
  • Vol 96, No HY 4, PROC PAPER 7246, PP 1019-1038
• Authors:
  • Laursen, E M
• Publication Date: 1970

Media Info

• Serial:
  • Journal of the Hydraulics Division
  • Volume: 96
  • Issue Number: HY10
  • Publisher: American Society of Civil Engineers

Subject/Index Terms

• TRT Terms: Backwaters; Bridges; Calculation; Channels (Waterways); Floods; Flow; Rivers; Streams; Valleys
• Uncontrolled Terms: Computation; Stream channels; Water surface profiles
• Subject Areas: Bridges and other structures; Highways; Hydraulics and Hydrology;

Filing Info

• Accession Number: 00204285
• Record Type: Publication
• Report/Paper Numbers: ASCE 7583 Proceeding
• Files: TRIS
• Created Date: Jul 27 1970 12:00AM