Laserfiche WebLink
<br /> ELlCTROMIC COMPUTER PROGRAM ABSTRACT <br /> . <br />ITIT"'!: OF ",00"-'11 P"OGRAM----..-o:- <br />Water Surface Profiles (HEC-2) 723-X6-L202A <br />"'E..A..'.... .......Cy The Hydrologlc Englneenng Center, U.:>. Army orps of tnglne~f.'-- <br /> 609 Second Street. Davis. California 95616 <br />IAlffHOl(lIT DAT" ITATUS 0" "ROGRA'M----- <br /> December 1968 PHA.. Im~p. -- <br />Bill S. Eichert Rev. November 1976 Init. <br />A. ..u.......".... ....00...... The program computes water surface profiles for steady, <br />gradually varied flow in rivers of any cross section. Flow may be subcritica1 <br />or supercritica1 . Various routines are available for modifying input cross <br />section data, for example, for locating encroachments or inserting a trape- <br />zoidal excavation on cross sections. The water surface profile through struc- <br />tures such as bridges, culverts and weirs can be modeled. Variable channel <br />roughness and variable reach length between adjacent cross sections can be <br />accommodated. Printer plots c~~ be m~~~~~f ;gr river cros~ sections and <br />computed profiles. Innut mav in ~i En ish of Metrlc unlts. <br />e. ..ROGfIIAIII..C.P't;ATIOII, <br />The program uses Fortran IV. <br /> . <br />c. MeT HOOI -c <br />The method used is the step method which is generally like method 1, U.S. Army <br />Corps of Engineers, Engineering Manual EM 1110-2-1409, 7 December 1959 - <br />Backwater Curves in River Channels. Friction losses can be calculated from a <br />choice of four different equations. Bridge losses are based on energy and <br />momentum principles, and weir and orifice formulas. Critical depth is based <br />on minimum energy. <br />D. .QUI~."T DIET AI.... <br />The program was written for use in the CDC 6600 co~puter but may be used with <br />minor modifications on other high-speed computers avinq five or.,more disk/tape <br />units plus input and output units such as those available on the IBM 360, IBM <br />370, and UNIVAC 1108. Memory requirements are approximately 32K words on CDC <br />6600. <br />-..~. <br />Input is by card. Tabular data can be produced on the printer from a <br />choice of sixty-three variables. Fixed-format tables can be requested <br />to display bridge, encroachment, channel improvement, floodway, and flood <br />insurance zone data. Printer plots can be obtained of profiles and cross <br />section. Program generated labels facilitate use on interactive terminals. <br />Punched card output is optional. <br />'0 ADDITIONAL 1t."A,UCI <br />A data edit program (723-Gl-L202C) which checks the data cards for various <br />input errors is available. <br /> . - - --- <br />I. <br /> <br />DII; POll.. <br />t Aua 60 <br /> <br />2883 <br /> <br />".IIYIQU. IIOfTIONa .... O......T.. <br /> <br />8 <br />