26 



BULLETIN 854, U. S. DEPARTMENT OF AGRICULTURE. 



Table 4. — Elements of experiments for concrete tile. 

 4-INCH TILE. 



1 



Test No. 



2 



Depth 



of 

 flow. 



3 



d 

 D 



4 



Area 



of 

 flow. 



(o) 



5 . 



a 

 A 



6 



drauhc 

 radius. 



(R) 



Dis- 

 charge. 



(Q) 



8 



Ve- 

 locity. 



(V) 



9 



Slope. 



(«) 



10 



Kutter 

 coeffi- 

 cient. 



(«) 



11 



Chezy 

 coeffi- 

 cient. 



(C) 



417' 



Feet. 



0.328 

 .282 

 .247 

 .206 

 .167 

 .118 



.311 

 .274 

 .239 

 .210 

 . 163 

 .118 



.323 

 .271 

 .243 

 .215 

 .162 

 .124 



.323 



.295 

 .271 

 .243 

 .211 

 .160 

 .118 



.315 

 .276 

 .243 

 .212 



.170 

 .121 



.305' 



.290 

 .269 

 .252 

 .222 

 .191 

 .173 



.296 

 .291 

 .278 

 .249 

 .209 

 .105 



.301 



.287 



, .242 



1.00 

 .80 

 .75 

 .63 

 .51 

 .36 



.95 

 .84 

 .73 

 .64 

 .50 

 .36 



.99 

 .83 

 .74 

 .66 

 .49 

 .38 



.99 

 .90 

 .83 

 .74 

 .04 

 .49 

 .36 



.90 

 .84 

 .74 

 .65 

 .52 

 .37 



.93 

 .88 

 .82 

 .77 

 .68 

 .58 

 .53 



.90 

 .89 

 .85 

 .70 

 .64 

 .50 



.92 

 .88 

 .74 

 . 62 

 . 60 

 .41 



.96 



.92 



.84 

 .78 

 .68 

 .49 



.38 



Sq.ft. 



0.0845 

 .0773 

 .0683 

 .0559 

 .0432 

 .0274 



.0828 

 .0754 

 .0600 

 .0571 

 .0419 

 .0274 



.0842 

 .0747 

 .0671 

 .0587 

 .0410 

 .0293 



.0842 

 .0801 

 .0747 

 .0071 

 .0575 

 .0409 

 .0274 



.0834 

 . 0759 

 .0071 

 .0578 

 .0442 

 .0283 



.0819 

 .0790 

 .0742 

 .0697 

 .0609 

 .0511 

 .0452 



.0803 

 . 0792 

 .0704 

 . 0088 

 .05118 

 .0426 



.0812 

 .0784 

 . 0008 

 .0552 

 .0396 

 .0322 



.0833 

 . 081 1 

 .0754 

 . 0705 

 .0615 

 .0406 

 .0290 



1.00 

 .92 



.81 

 .66 

 .51 

 .32 



.98 

 .89 

 .78 

 .68 

 .50 

 .32 



.99 

 .88 

 .79 

 .70 

 .49 

 .35 



.99 

 .95 

 .88 

 .79 

 .08 

 .48 

 .32 



.99 

 .90 

 .79 

 .68 

 .52 

 .34 



.97 

 .94 

 .88 

 .83 

 .72 

 .61 

 .54 



.95 

 .94 

 .90 

 .81 

 .67 

 .50 



.90 

 .93 

 .79 

 . 65 

 .17 

 .38 



.99 

 .90 

 .89 

 .83 

 .73 

 .48 

 .31 



Feet. 

 0. 0S20 

 .0993 

 .0990 

 .0930 

 .0829 

 .0649 



.0941 

 .0997 

 .0982 

 .0938 

 .0817 

 .0649 



.0890 

 .0998 

 .0986 

 .0948 

 .0814 

 .0674 



.0886 

 .0978 

 .0998 

 . 0986 

 .0940 

 .0807 

 .0649 



.0928 

 .0990 

 .0986 

 .0943 

 . 0838 

 .0661 



.0959 

 .0985 

 .0998 

 .0994 

 .0901 

 .0897 

 .0847 



.0976 

 . 0984 

 . 0995 

 . 0992 

 . 0936 

 .0823 



. 0907 

 .09188 

 . 0985 

 . 0920 

 .0793 

 .0710 



.0931 

 . 0905 

 .0997 

 .0996 

 .0904 

 .0804 

 .0669 



Cu.ft. 

 per sec. 



0. 0420 

 .0380 

 .0335 

 .0196 

 .0120 



2.0020 



.0650 

 .0550 

 .0450 

 .0375 

 .0218 

 .0083 



.0832 

 .0800 

 .0650 

 .0544 

 .0280 

 .0127 



.1014 

 .1041 

 . 0909 

 .0848 

 .0591 

 .0298 

 .0130 



.1415 

 .1235 

 .0996 

 .0788 

 .0478 

 .0200 



.1775 



.1680 

 .1459 

 .1299 

 . 0950 

 .0090 

 .0594 



.1931 

 .1905 

 . 1080 

 .1382 

 . 1046 

 . 0022 



.2250 

 .2124 

 . 1650 

 .1377 

 .0700 

 .0410 



. 2544 



.2150 



. 2236 

 .1892 



. 1500 



.OS IS 



.0438 



Feet 

 per sec. 



0.504 

 .499 

 .491 

 .315 

 .278 



2 .07o 



.785 

 .730 

 .682 

 .656 

 .519 

 .301 



.988 

 1.071 

 .908 

 .927 

 .673 

 .434 



1.204 

 1.300 

 1.298 

 1.263 

 1.028 

 .727 

 .475 



1.697 

 1.027 

 1.484 

 1.304 

 1.081 

 .700 



2.168 

 2.133 

 1. 908 

 1.866 

 1.571 

 1.302 

 1.314 



2.400 

 2. 404 

 2.208 

 2.008 

 1.840 

 1 401 



2.771 

 2.709 

 2. 478 

 2.492 

 1.918 

 1.293 



3.050 

 3.018 

 2.965 

 2.684 

 2. 449 

 2.088 

 1.511 



0. 0005 

 .0005 

 .0005 

 .0005 

 .0005 

 .0005 



.0010 

 .0010 

 .0010 

 .0010 

 .0010 

 .0010 



.0020 

 .0020 

 .0020 

 .0020 

 .0020 

 .0020 



.0030 

 .0030 

 .0030 

 .0030 

 .0030 

 .0030 

 .0030 



.0050 

 .0050 

 . 0050 

 . 0050 

 .0050 

 .0050 



.0075 

 . 0075 

 .0075 

 . 0075 

 . 0075 

 . 0075 

 .0075 



.0100 



.0100 

 .0100 

 .0100 

 .0100 

 .0100 



.0125 

 .0125 

 .0125 

 .0125 

 .0125 

 .0125 



.0150 

 .0150 

 .0150 

 .0150 

 .0150 

 .0150 

 .0150 



0. 0107 

 .0120 

 .0122 

 .0160 

 .0163 



2 . 0352 



.0110 

 .0120 

 -0124 

 .0124 

 .0134 

 .0172 



.0116 

 .0117 

 .0125 

 .0126 

 .0144 

 .0175 



.0117 

 .0117 

 .0119 

 .0120 

 .0135 

 .0157 

 .0185 



.0113 

 .0121 

 .0129 

 . 0133 

 .0146 

 .0171 



.0112 

 .0116 

 .0123 

 .0127 

 .0141 

 .0150 

 .0149 



.0117 

 .011S 

 . 0125 

 .0134 

 .0138 

 .0151 



.0114 

 .0117 

 . 0124 

 .0120 

 .0132 

 .0103 



.0111 

 .0114 



.0118 

 .0120 

 .0128 



.0133 



.0150 



78.7 



4 IS 



70.9 



419 



09.7 



420 



46.3 



421 



43.1 



422 



2 13.1 



4231 



80.9 



424 



73.1 





68 8 



420 



67.8 



427 



57.4 



428 



4291 



430 



37.4 



74.1 

 75.8 



431 



432 



68.9 

 67.3 





52.8 



434 



37.4 



435' 



73.8 



430 



75.9 



437 



75.0 



438 



73.4 



439 



61.2 



140 



46.7 



441 



34.1 



4421 



78.8 



443 



144 



445 



446 



447 



4481 



72.9 

 66.8 

 62.8 

 52.8 

 38.9 



80.8 



449 



450 



451 



78.5 

 71.9 

 68.3 



452 



58.5 



453 



4.54 



52.5 

 52.1 



455 



77.0 



450 



157 



70.0 

 70.0 



458 



63.8 



459 



60.1 



460 



50.9 



40U 



-02 



79.7 

 77.1 



4f>3 



70.6 



464 



. 20 4 

 .196 



. 133 



..'ill 

 . 302 



.271 

 .255 

 .224 

 .159 



.123 



73. 3 



465 



60.9 



466 



43. 4 



407 1 



108 



81.8 

 7C.3 



469 .. 



70.7 



470 



69. 5 



171 



00.3 



472 



60.1 



173 



47.7 







i These lests used in deriving formula 20 and 28. 

 s Evidently an incorrect hook-gage reading. 



