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<br />12 <br /> <br />TECHNIQUES OF WATER-RI,SOURCES INVESTIGATIONS <br /> <br />datum elevation of the culvert invert at the <br />entrance. The fixed decimal is in column 14. <br /> <br />Columns 18-22. --D. fixed decimal in column <br />20, is the maximum inside vertical dimension, <br />in feet, of the culvert barrel. For corrugated <br />pipes, D is measured as the minimum inside <br />diameter. <br /> <br />Columns 24-29. --b, fixed decimal in column <br />27. is the horizontal inside width, in feet, of <br />a box or pipe culvert, or the sum of the in- <br />side widths of multibarrel culverts with webs. <br />NOTE: If the culvert is a pipe- arch, b is the <br />size of the culvert as coded in table 1 on page <br />13. Select the nominal dimensions that most <br />nearly approximate the span and rise of the <br />culve'rt barrel. Use the SIZE, including the <br />decimal and both zeros, corresponding to the <br />selected nominal dimensions. Do not inter- <br />polate. <br /> <br />Columns 32-36. --n is the roughness coeffi- <br />cient of the barrel. The fixed decimal is in <br />column 3.3. <br /> <br />Columns 38-44. --L is the length, in feet, of <br />the. culvert barrel, with the fixed decimal in <br />column 42. <br /> <br />Columns 51-54 --k , fixed decimal in column <br />. r <br />52, is the adjustment factor for entrance <br />rounding of a box culvert, type 3 flow only; <br />otherwise, use O. O. <br /> <br />Columns 56-59. --k , fixed decimal in col- <br />w <br />umn 57, is the adjustment factor for entrance <br />beveling of a box culvert, type 3 flow only; <br />otherwise use O. O. <br /> <br />Columns 61- 64. - - k is the adjustment factor <br /> <br />for wingwall angle or a box culvert, type 3 <br />flow only; otherwise use O. p. The fixed dec- <br />imal is in column 62. <br /> <br />Column 68. --CAL is .an option. To compute <br />one headwater elevation for each discharge, <br />with no influence from the tailwater--type 1, <br />2, or 5 flow--use integer L To compute all <br />possible> headwater elevations for each dis- <br />charge, including those when the tailwater is <br />partially controlling~-types 3,and 4 nO\\~--use <br />integer O. <br /> <br />Colmlln 71. -- \VEB is an integer, 0 to 9, <br />speCltYlug the number of vertical webs in the <br />barrel of a box culvert. The introduction of <br />webs into the computation does not alter the <br />area but changes the wetted perimeter, hy- <br />draulic radius, and conveyance, <br /> <br />Columns 74-78. --SEQUENCE is the card <br />sequence number, right justified. (Use pre- <br />vious sequence number. plus 1.) <br /> <br />Column 80. --The card nuroner is 9. <br /> <br />Checking Input Data <br /> <br />The checker has the responsibility to see <br />that the data sheets have the correct figures, <br />that numbers are in the right columns, that <br />a figure is entered wherever one is required <br />by the p~ogram, and that all entries are leg- <br />ible. If a correction is necessary, cross <br />out the entire figure and enter correct digits <br />directly above those crossed out. <br /> <br />A correct figure in the wrong column may <br />mean that the decimal point was shifted or <br />that one of the digits may not be read into <br />the computer, which would charige the figure <br />by several orders of magnitude, or that a <br />necessary bit of information was omitted, <br />which would result either in no solution. or <br />an incorrect solution. <br /> <br />Some specific entries to cross check are: <br /> <br />1. On card 2, columns 42-59, W <br />. max <br />minus W must equal ~W times a whole num- <br />o <br />bel' not greater than 24. <br /> <br />2. The number of stations, card 2, col- <br />umns 61-62, must equal the sum of the sta- <br />tions listed on all cards 3. <br /> <br />3. The number of subareas. card 2, col- <br />umn 64, must equal subarea number for last <br />station listed on card 3. <br /> <br />4. The first and last ground elevations on <br />cards 3 should be equal to or greater than <br />2.0 D -+- Z elevation. <br /> <br />5. The T c value on card 9 should he <br />compatible with the IfP, CP, CB, k . k , <br />and k values. r w <br />13 <br /> <br />6. The k . k . and ke values should be <br />r w . <br />0.0, 0.0, and 0.0 if Tc is I or 3, or if <br />card 6 is blank, or if column 68 of card 9 is <br />1. <br /> <br />TRANS MITT AL <br /> <br />Send the completed data forms to the hy- <br />draulic specialist or computer c0nsultant in <br />the Regional Office until it is evident that <br />