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• _ ( L M <br />43560 <br />(15) <br />M <br />N = number of wetting furrows = Q (total gpm) /corrugate flood rate (start with 7gpm per <br />gate, then round up to the next even number of sections of pipe) <br />flow per gate: 7 (7gpm V try) (16) <br />1 7 <br />gated pipe comes in 30ft lengths @ 2.5ft spacings per gate =12 gates per pipe section <br />N= I" Estimated number of gates = (14) /(16) (Not final number) <br />(17) <br />Estimated :Number of 30ft gated pipe: <br />'4+ <br />_ (17)/12 = ' -- � 3, 4 7Rounded up to whole number = %t (18) <br />Net number of Gates <br />N =(18)x 12 <br />4--Y ( � 4-8 c (19) <br />R= width between wetting furrows, feet (301nch or 2.511) (20) <br />L = row length, feet (NRCS recommends 400- 600$)... use Q (21) <br />NUMBER OF SETS PER DAY: <br />= 24/ (I1) <br />= 24/ q <br />= Z . L `7 (rounded down) = 2- ° (22) <br />SYSTEM EFFICIENCY ( maintenance, cleaning head gate, checking water, farmer needed <br />time off) ... _ (23) <br />0 �--- 1 _ "� / 6%" <br />wrc K V <br />