<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 />
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