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<br />MEASUREMENT OF PEAK DISCHARGE AT CULVERTS BY INDIRECT METHbDS Ui
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<br />Table 4.-Coefficients for pipe-arches. flowing partly Full
<br />[Coefficients for (1) area, (2) bydrnulil.' radius, (3) C'onve~'aIl('(', (4) Illrnn dl'ptb, (5) dis~harl,!:l' fOT ('ritkal-dq)th 1I0wl
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<br /> , I I
<br /> (1) , (2) (3) (4) I
<br /> I ,
<br />dlDt A=C.IJ21 R=C,D I i
<br />I K=C.D~/I d...=C",D
<br /> C, I c. i c. C.
<br /> 1
<br />
<br />-----;;;--T
<br />Q=Cv[)&!2 I dlDl
<br />,
<br />I
<br />_~~L___
<br />
<br />(0 I') (3) ,ll \;;,
<br /> -~-----_._"
<br />A=C.D~ R=C,D ' Dil,'l J..=C...D Q""(',/)I.'1
<br />!K=Ctn
<br />C. C. C. C. C,
<br />
<br /> A. Nominal size 6 feel t loth X "feet 1 inthes
<br /> ,---,----..-------- -'1-' ---~-----_.-
<br /> 0, 01 I 0.005 0.016 I 0,000 0.016 0,003 0, "I I 0, "R(; I O.28H 0,380 0.4;')0 2,2:]
<br /> ,02 .009 ,OUl' ,001 .OIH ,007 . ri2 , (;00 ,292 ,393 ,463 ~, :j~
<br /> ,03 , ,014 .025 ,002 .025 ,012 . ;,a .614 ! ,296 ,406 ,476 ~,41
<br /> ,04 ,019 ,029 ,003 ,029 ,018 .54 ,628 ,300 ,419 ,490 ; 2. .~o
<br /> ,05 ,026 ,036 ,004 .035 ,028 . .~5 ,64:J ,304 ,431 . ,')04 2. !in
<br /> ,06 .033 .042 ,006 ,041 ,038 . ;'56 .657 .307 I .445 . ,')19 2.GB
<br /> ,07 ,042 .048 ,008 ,048 .0.52 .57 .671 ,311 ,458 . [,3.') 2. 7H
<br /> ,08 ,050 , OM ,011 I ,054 ,066 .58 ,686 .314 i ,471 .51;1 2.SU
<br /> ,09 .059 ,061 ,014 i ,061 ,082 .5n ,700 ,318 ,484 .568 2.9B
<br /> .10 ,068 ,067 ,017 ,067 .099 ,60 ,714 ,321 ,497 .584 3,10
<br /> ,11 .078 ,075 i ,021 ,076 ,122 ,61 ,724 i ,321 , .505 . .597 3,17
<br /> ,12 ' ,089 .082 .025 ,084 .145 ,62 ,733 ,322 , ,512 ,609 3.2;)
<br /> .13 ,099 .089 ,029 ,091 .170 ! ,6:J ,743 , 3221 . .519 ,621 3,32
<br /> ,14 ,110 ,096 ,034 ,099 ,195 II ,64 .752 ,323 ,526 ,634 :J,40
<br /> ,15 ,120 ,102 ,039 ,106 ,221 .65 ,762 ,323 ,533 ,647 ~. 48
<br /> ,
<br /> ,16 ,131 ,109 .044 I ,114 ,251 ,66 ,776 ,327 ,547 ,666 3. ;j\}
<br /> ,17 ,142 .115 I ,050 ,122 ,282 ,67 ,790 .330 i ,561 ,686 3.71
<br /> , 18 ,154 ,121 ,056 .129 ,314 ,68 .805 ,334 .576 ,706 3,84
<br /> .19 ,165 ,127 ,062 ,137 ,346 ,69 ,819 ' ,337 , .s90 ,727 3,96
<br /> .20 , 176 ,132 ,068 ,144 ,380 , 70 ,833 ,341 ,604 ,749 4,09
<br />- ,21 , 189 ,139 .075 ,153 ,418 ,71 ,84:J ,341 ,611 ,766 4,19
<br />.22 .201 .145 ,082 ,162 ,458 ,72 ,8.52 ,341 ,619 .784 4,28
<br />,23 ,213 .151 ,090 ,170 ' ,499 ; ,73 ,862 , :142 ,626 ,80:j 4,38
<br />,24 ,226 .157 ,098 , ,178 , . :")41 ' ,74 ,871 , :142 ,638 ,822 4, 48
<br /> ,25 ,238 ,163 .105 ,186 .583 .7fi ,881 , :l42 ,640 ,841 4. ,"',x
<br /> 26 , 252 . 170 i .115 ,197 .635 ,76 890 I ,343 ,649 ,864 4. 70
<br /> ,27 ,267 ,177 ,125 ,207 ,688 .77 : 900 I .345 ,657 ,889 4,81
<br /> ,28 .281 ,184 ,135 ,217 ,742 .78 I .90B ,346 ,666 ,914 4. B;~
<br /> ,29 ,295 ,191 ,145 ,227 ,797 ,79 ,919 ,347 ,675 ,940 ii.06
<br /> ,30 ,309 ,197 ,156 ,236 ,854 ,80 I ,928 ,349 .684 i .967 .j.18
<br /> ,31 ,324 ,203 ,166 I ,246 .912 ,81 ,936 ,347 ,687 ,998 il.31
<br /> ,32 ,338 ,209 ,177 , ,256 ,972 ,82 ,944 .345 ,690 1. 03 5. 4:~
<br /> ,33 ,352 ,215 .188 i ,266 1. 03 ,83 ,951 , ,344 ,694 1.06 i). fl7
<br /> ,34 ' ,367 ,221 ,199 I ,276 I 1. 09 ,84 ,959 ,342 ,697 1.10 ij. 70
<br /> ,35 .381 ,227 ,210 ,286 , 1.16 .85 ,966 ,341 ,701 1.14 ;j,8fi
<br /> I
<br /> ,36 ,392 ,231 ,219 ,295 1. 21 ,86 ,973 ,338 ,702 1. 18 6, 01
<br /> ,37 ,404 ,234 ' ,228 ,303 1. 26 ,87 ,980 ,336 ,704 1. 23 6, IS
<br /> ,38 ,415 ,238 ,237 ,312 1. 32 ,88 ,986 ,334 ,706 1. 29 6.3.1
<br /> ,39 ,427 ,241 ,246 ,320 1. 37 ,89 ,993 ,332 ,707 1.3;) 6.M
<br /> ,40 ,438 ,245 ,2.55 ,329 1. 42 ,90 1. 00 ,330 ,709 1. 41 6.14
<br /> ,41 ,450 ,249 ,265 ,338 1. 49 ,91 1.00 ,326 ,707 1. 50 B.HS
<br /> ,42 ,463 ,252 ,275 ,347 1..5.5 ,92 1.01 ,323 , .705 1. 60 7. 2;~
<br /> ,43 ,475 ,256 ,285 ,357 1. 61 ,93 1. 01 ,319 i ,704 1. 71 7.52
<br /> ,44 ,488 ,260 ,295 I ,366 ; 1. 67 ,94 1. 02 ,316 ,702 1. 83 7,82
<br /> ,45 ,500 .263 ,376 1. 74 ,95 1. 02 ,313 ,701 2.02 I 8.2Ii
<br /> .305 I
<br /> I
<br /> ,46 ,514 ,268 ,317 ,388 1. 82 ,96 1. 03 ,304 ,691 I
<br /> ,47 , .528 ,272 ,330 ,400 1. 90 ,97 1. 03 ,296 ,682 :::::::1:
<br /> ,48 I .543 ,276 ,342 ,412 1. 98 ,98 1,04 ,288 ,673 :::::::t~::::
<br /> .49 I .557 ,281 I .355 ,424 2,06 ,99 1. 04 ,281 ,665
<br /> ,50 I ,571 I ,285 ,367 ,436 2, 14 1. 00 1. 05 ,274 ,658
<br /> (d=depth of water, in feet; D=rise, in Ceet.
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