Record Display for the EPA National Library Catalog


Main Title Numerical Routing of Flood Hydrographs Through Open Channel Junctions.
Author Larso, Curtis L. ; We, Tsong C. ; Bower, C. Edward ;
CORP Author Minnesota Univ., Minneapolis. Water Resources Research Center.
Year Published 1971
Report Number WRRC-Bull-40; DI-14-01-0001-890; OWRR-B-007-MINN; 12320; B-007-MINN(6)
Stock Number PB-202 626
Additional Subjects ( Flood routing ; Mathematical models) ; ( Open channel flow ; Flood routing) ; Watersheds ; Surface water runoff ; Storms ; Discharge ; Equations of motion ; Flood hydrographs
Library Call Number Additional Info Location Last
NTIS  PB-202 626 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 75p
The study was concerned with numerical routing of flood hydrographs through open channel junctions. An open channel junction with a main channel above and below plus a branch channel were constructed in the laboratory. All channels were rectangular in shape, but varied in size. Facilities and procedures for supplying hydrographs to the two channels above the junction were developed. Provision was made for measuring both inflow and outflow hydrographs and also flow depths at selected points in the three channels. A total of 14 experiments were conducted with various combinations of input hydrographs in terms of magnitude and relative timing. Unsteady flow conditions (depth, velocity and discharge) in the three channels were calculated at 5-ft. length increments and 1-sec. time increments, using the method of explicit finite differences applied to the characteristic equations. A procedure for calculating unsteady flow backwater effects in either or both of the upstream channels was developed and utilized as an integral part of the routing method. The junction routing procedure appears to be fairly general, having been applied in a situation where the channels above and below the junction are at different size, slope and elevation. (Author)