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<br />ELICTROMIC COMPUTIR PROGRAM ABSTRACT <br />TIT L.IE 0" ",OGIIIAII I PIIIOGRAM NO. <br />Gradually Varied Unsteady Flow Profiles 723-G2-L7450 <br />PIlE"A'"'''' AGucYThe Hydrologic En~ineering Center, US Army Corps of Engineers, --.- <br />609 Second Street, Davis, CA 5616 <br />"U~HG~ml Program obtained from GATE' ITATUI 0' "'''OG"AM-.---. <br />Tennessee Valley Author~~y Mar 69 Ver 2.3, July 75 "MA.. rT".. -- <br />(modified by Tony Thomas Ver 3.0, Jan 76 Init. Op. <br />A. ..u....o-.r OP ....00...... <br />This program simulates one-dimensional, unsteady, free surface flows. It <br />calculates water surface elevations, discharges, velocities, and flow direction <br />as functions of time at each cross section. Discharge hydrographs, stage hy- <br />drographs, or rating curves may be used for boundary conditions. Local (trib- <br />utary) inflow can be accommodated. <br />.. NoenlAM _"Ct"'CATIOId <br />Written in FORTRAN IV. <br />C. ..T HODI <br />Solution of the one-dimensional equations of continuity and momentum (the <br />St. Venant equations) is accomplished by numerical integration using an <br />explicit, centered difference computation scheme. <br />D. .OUIN.NT DETAILS <br />Program utilizes about 45,000 words of core. <br />~.OUT""T <br />Ca rd input and printer output. Printer plots of discharge versus time can be <br />generated. <br />'0 ADDITIONAL ....Allta <br />Requisite geometric data in the form of tables of area, top width, and hydrau- <br />1 ic radius are prepared from field survey data by an auxil iary program (723- <br />G2-L745B) . <br />Boundary conditions are entered as coordinate points and straight line i nter- <br />polation is performed between points. <br />A stabilit~ te;~;~~T~erfo~~;d.~~~er each 10 computational cycles and a warning <br />prints if lnsta ']; ;c ,or <br /> <br />_ ~'::'Oll': 2883 <br /> <br />....bIOU. aDlTION. Alt. O..LeTa. <br /> <br />g <br />