22 



BULLETIN 852, U. S. DEPARTMENT OF AGRICULTURE. 



Table 3. — Elements of experiments for the determination of friction losses in concrete 

 pipes, running full; toith retardation coefficients for various formulas — Continued. 



1 



2 



u 

 a 



3 



I 



o 



5 



6 



u 



QJ 

 P. 



>> 



S 

 u 



Coefficients of retardation. 





9 



10 



11 



12 



13 



14 



1-4 



"3 c 



i& 



a 



o 

 C3 



s 



Name and description of 





o a 



"1 



■Jo 















a 



ID 





> 



u 

 a 



pipe. 



!3 o 



§» 



>— o 





n 



i 





C3 







J3 



O 



a 





5 



§ ^ 



s 



o 



h3 



o 

 w 







o 



a 



3 



1 









d 





Q 



V 



H 



C s 



c 



Cw 



Cm 



n 



/ 









ins. 





cu.ft. 



feet. 



feet. 















9 



S24 



1 



16.0 



Pomona, Calif.; jointed ce- 



1.37 



.98 



.536 



.237 



73.1 



86.8 



.90 



.0154 



.0478 





1915 



2 





ment pipe, straight, on 



1.54 



1.10 



.512 



.272 



84.6 



99.8 



1.03 



.0132 



.0362 







3 





continuous down grade ; 

 pipe clean; laid 1883. 



1.62 



1.16 



.570 



.272 



84.1 



99.4 



1.02 



.0128 



.0363 



10 



S 22 



4 



16.0 



Pomona, Calif. ; jointed ce- 



2.40 



1.72 



1.001 



.304 



94.5 



108.6 



1.11 



.0127 



.0290 





1915 



3 





ment pipe, straight, on 



2.47 



1.77 



1.051 



.305 



94.6 



108. 9 



1.11 



.0127 



.0287 







5 





continuous down grade; 



2.61 



1.87 



1.251 



.296 



91.7 



104.7 



1.07 



.0130 



.0306 







2 





pipe clean; laid 1883. 



2.74 



1.96 



1.315 



.302 



93.8 



106.9 



1.09 



.0128 



.0293 







7 







2.82 



2.02 



1.415 



.300 



93.1 



105.9 



1.08 



.0129 



.0297 







1 







2.92 



2.09 



1.445 



.307 



95.4 



108.2 



1.10 



.0127 



.0283 







6 







3.35 



2.40 



1.964 



.303 



93.8 



105.4 



1.07 



.0129 



.0292 







8 







3.41 



2.44 



2.088 



.292 



92.4 



103.6 



1.05 



.0129 



.0305 



11 



S25 

 1915 



1 



16.0 



Pomona, Calif.; jointed ce- 

 ment pipe, continuous 

 grade. 



2.40 



1.72 



.984 



.306 



95.0 



109.7 



1.12 



.0127 



.0285 



12a 



"Nl 





16.0 



Z a siphon, Umatilla pro- 



3,74 



2.68 



3.800 



.243 



75.0 



82.4 



.82 



.0154 



.0453 





1912 







ject, U." S. Reclamation 

 Service, Oreg. 



4.87 



3.49 



4.500 



.291 



90.0 



98.0 



.98 



.0134 



.0317 



13a 



N2 

 1912 





16.0 



Z siphon, Umatilla pro- 

 ject. 



3.42 



2.45 



1.900 



.314 



98.0 



109.5 



1.11 



.0125 



.0271 



14 



S58 



1 



18.0 



Edwards line, Oakdale 



3.48 



1.97 



1.625 



.254 



79.8 



88.9 



.89 



.0148 



.0405 





1916 



2 





irrigation district, Calif.; 

 straight siphon. 



3.79 



2.15 



1.930 



.254 



79.8 



88.3 



.88 



.0150 



.0405 



15 



S56 

 1916 



1 



18.0 



Batdorf line, Oakdale 

 irrigation district; straight 

 down grade. 



1.70 



.96 



.309 



.284 



89.7 



106.6 



1.11 



.0132 



.0321 



16 



S42 



6 



19.7 



C lateral, Kami oops, B. C, 



.79 



.37 



.056 



.246 



78.1 



98.3 



1.03 



.0133 



.0429 





1916 



2 





Canada; straight in align- 



1.07 



.50 



.109 



.238 



75.8 



92.7 



.96 



.0145 



.0459 







3 





ment, wavy in profile, 



1.75 



.84 



.272 



.249 



79.2 



93.6 



.95 



.0148 



.0417 







4 





rough joints; laid 1911. 



2.35 



1.12 



.466 



.255 



81.3 



93.7 



.95 



.0147 



.0397 







5 







2.63 



1.25 



.538 



.264 



84.4 



96.8 



.98 



.0143 



. 0371 







7 







2.93 



1.39 



.745 



.251 



79.6 



90.6 



.91 



.0151 



.0412 







1 







3.12 



1.48 



.781 



.260 



82.7 



93.9 



.94 



.0144 



.0382 



17 



S46 



4 



19.7 



Bishop lateral, Kamloops, 

 B. C., Canada; jointed 



1.33 



.63 



.102 



.307 



98.6 



120.0 



1.24 



.0124 



.0271 





1916 



5 





1.98 



.94 



.215 



.315 



100.0 



119.5 



1.22 



.0121 



.0257 







7 





cement pipe, gentle 



3.14 



1.49 



.557 



.310 



98.7 



113.4 



1.14 



.0126 



.0265 







8 





curve in alignment, on 



3.70 



1.76 



.744 



.316 



100.4 



114.2 



1.15 



.0126 



.0255 







6 





continuous down grade; 

 laid 1911. 



4.13 



1.96 



.946 



.313 



99.5 



112.0 



1.12 



.0127 



.0260 



18 



S60 



5 



19.9 



Temescal Water Co., Co- 



2.14 



.99 



.200 



.340 



108.4 



129.4 



1.33 



.0119 



.0220 





1916 



4 





rona, Calif.; inverted 



3.63 



1.68 



.580 



.339 



108.1 



123.7 



1.25 



.0118 



.0221 







2 





siphon of jointed cement 



4.07 



1.88 



.700 



.346 



109.8 



125.3 



1.26 



.0117 



.0212 







3 





pipe reinforced, straight 



5.13 



2.37 



1.094 



.349 



111.3 



124.3 



1.24 



.0116 



.0208 







1 





in alignment, double 

 reverse curve in profile; 



laid 1911. 



5.50 



2.54 



1.278 



.346 



110.4 



122.5 



1.22 



.0117 



.0212 



19 



F 



1 



20.0 



Wrought-iron cement-lined 



2.07 



.95 



.230 



.304 



97.4 



115.2 



1.18 



.0124 



.0274 





1880 



2 





pipe, 8,171 feet long ac- 



3.25 



1.49 



.440 



.345 



109. 8 



127.2 



1.29 



. 0115 



.0213 







3 





cording to Schmeer. 



4.20 



1.92 



.730 



.346 



110.7 



125. 1 



1.26 



.0116 



.0212 







4 







5.08 



2.33 



1.040 



.351 



112.0 



125.1 



1.25 



.0116 



. 0206 







5 







5.67 



2.60 



1.340 



.345 



110.1 



121.7 



1.21 



. 0117 



.0213 







6 







6.26 



2.87 



1. 580 



. 351 



111.7 



122.8 



1.22 



.0115 



.0205 







7 







7.14 



3.27 



1. 990 



.356 



113.5 



123.7 



1.23 



.0114 



.0200 







8 







7.50 



3.44 



2.280 



.350 



111.7 



120.9 



1.20 



.0116 



.0207 







9 







8.16 



3.74 



2.720 



.349 



111.1 



119.6 



1.18 



.0117 



.0209 







10 







8.55 



3.92 



3.000 



. 348 



110.8 



118.9 



1.17 



.0118 



.0210 







11 







8.73 



4.00 



3.130 



.348 



110.7 



118.5 



1.17 



.0118 



.0210 







12 







8.82 



4.04 



3.200 



.347 



110.6 



118.3 



1.16 



.0118 



. 0210 



20 



S57 



1 



23.7 



Clavey siphon, Oakdale 



4.77 



1.55 



.426 



. 328 



106.7 



120.9 



1.21 



.0122 



.0226 





I'JIli 



21 



irrigation district, Calif.; 



5.59 



1.82 



.543 



.340 



110.7 



124.4 



1.24 



.0119 



.0210 







3l 



monolithic, on gentle up- 



6.02 



1.95 



.522 



.373 



121.6 



136.7 



1.36 



.0110 



.0174 











grade; built 1912. 





















