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I <br />TOTAL SIDEROLL <br />HEADLOSSS _ (S iderol l Length fgRL1) x (HeaSj'joss C181) x IP1 <br />with 5" Lateral (2.31)x(100) <br />( )x( )x( ) a psi [19] <br /> <br />I 2.31x100 <br />PRESSURE GAIN (or LOSS) DUE <br />TO FIELD SLOPE _fS] %- x fSRL1 ( } x ( ) <br /> 2.31 x 100 2.31 x 100 <br />! NOTE: Look at most <br />restrictive conditions a ( } ± psi. [201 pressure <br />in an entire field. due to elevation change <br />PRESSURE VARIATION: <br />' Si.deroll Headlos s 1191 + Elev pressure Gain or Lass (jai <br /> (DPI <br />_ ( ) + or - ( ) x 100 ( } °s* <br /> <br />*PRESSURE VARIATION MUST NOT EXCEED + 10% of DP. It flow control <br />nozzles are used, then ± 10% prssure limit can be dealt with easily. <br />REQUIRED-PRESSURF, AT MAINLIN E AT BEGI-N-NING OF SIDEROLL MPS <br />For Level Laterals (DPI + 0.75 (191 +1 <br /> + 0.75 ?I. +1 = <br />For Lateral Laid Downhill = [DPI + 0.75 (191 - 0.5 [201 + 1 <br /> + 0.75 ?L - 0.5 + 2 = <br />For Laterals Laid Uphill = (DP] + 0.75 [191 + 0.5 (201 + 1 <br />(not recommended) + 0.75 E •1 + 0.5 rl + 1 =