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<br /> 0.1 <br /> 0.08 r:: <br /> 0.06 <br /> 0.05 f <br /> 0.04 <br />- 0.03 <br />'- <br />- t <br />E 0.02 <br />'- I <br />E '- <br />f- I <br />z 0.01 r- <br />w 0.008 E <br />0 <br /><( <br />a:: 0.006 L <br /><.? 0.005 ~ <br />if) <br />if) 0.004 ~ <br />0 <br />--" 0.003 <br />0 t <br /><( <br />w 0.002 <br />I I <br /> L <br /> I <br /> (100) (1501 (2501 <br /> 0.001 I <br /> I , <br /> 0.2 0.3 0.5 0.7 1.0 1.5 2.0 3.0 5.0 70 10 15 20 <br /> FLOW RATE, LITERS/SEe (GPM) <br /> <br /> <br /> <br /> <br /> <br />Figure 5.--Head loss gradient as a <br />sizes of corrugated polyethylene pipe. <br />the Mannings' equation using a friction <br />and Willardson, 1970). <br /> <br />function of flow rate for four <br />The curves were calculated fron: <br />coefficient of 0.016 (Hermsmeier <br /> <br />Table 1. Reduction coefficient, F, for various numbers <br /> <br /> <br />of equally spaced outlets along a lateral line <br /> <br /> <br />(from Table 5.1, Karmeli and Keller, 1975). <br /> <br />Outlets F Outlets F Outlets F <br />, 1. 000 8 0.415 20 0.376 <br />L <br />2 0.639 10 0.402 25 0,371 <br />3 0.535 12 0.394 30 0.368 <br />4 0.486 14 0.387 40 0.364 <br />5 0.457 16 0.382 50 0.361 <br />6 0.435 18 0.379 100 0.356 <br /> UU2966 <br /> <br />-6- <br />