A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Backwater and Discharge at Highway Crossings with Multiple Bridges in Louisiana and Mississippi
Data were collected for nine floods in Mississippi and Louisiana at eight stream crossings having two to six separate bridge openings. Discharge through each bridge, water-surface profiles, valley cross sections, and bridge geometry were measured. The multiple openings were divided into equivalent single-opening cases by apportioning interior embankments in direct proportion to the area of openings on either side. Using existing procedures for computing discharge, the basis in computed discharge was 2 percent with a root mean square error of 18 percent. Backwater was computed by two current U.S. Geological Survey methods that use the average flow path in the friction loss term for the approach. The results indicate that the method developed for single-opening highway crossing can be applied to the multiple bridge crossings.
Backwater and Discharge at Highway Crossings with Multiple Bridges in Louisiana and Mississippi
Data were collected for nine floods in Mississippi and Louisiana at eight stream crossings having two to six separate bridge openings. Discharge through each bridge, water-surface profiles, valley cross sections, and bridge geometry were measured. The multiple openings were divided into equivalent single-opening cases by apportioning interior embankments in direct proportion to the area of openings on either side. Using existing procedures for computing discharge, the basis in computed discharge was 2 percent with a root mean square error of 18 percent. Backwater was computed by two current U.S. Geological Survey methods that use the average flow path in the friction loss term for the approach. The results indicate that the method developed for single-opening highway crossing can be applied to the multiple bridge crossings.
Backwater and Discharge at Highway Crossings with Multiple Bridges in Louisiana and Mississippi
B. E. Colson (author) / V. R. Schneider (author)
1983
49 pages
Report
No indication
English
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