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<br /> � ; OSTP Pressure Distrib tion
<br /> Minnesota Palluifon UN1VL�fZSITY �`� �;�-
<br /> Control A enc Design WorksheQ OF MINNESOTA �� �
<br /> �1�
<br /> ProjectiD: y 11 09 22
<br /> 9. Select Numbero/Perjorated Latera[s inrystem/zone: �7 ------
<br /> (z jeet is minimum and 3 feet!s mmdmum spac►ng) �w.�.,,"-,�_,,°-
<br /> 2. Selett Per ;r:_•. ...��:�{,.r���:i:��V"%" ',_i:;:<.'. .. _, '�=i' •- _
<br /> Joratton Spacing: 3.0 ft ""� >�_'��< s ; .
<br /> � -� t-
<br /> �..;aMe� ' . .
<br /> •�.-...�.,�:.uo.�..y,.,..ria•.K„n �-�:•a.�ti �z- `
<br /> 3. Setect Per/oration dtometer Sixe 7/32 tn _
<br /> . . 4'�f���k . .
<br /> 9. Length oJ tatera(s =Medla Fied Length-2 Feet, h�.�.,�,�u,��,�,.-,,,.,:- ,�.+«,,�.,,x,.,,,,,,,-,�,.
<br /> 63 - 2ft = 6i ft Perforotlon ran t 6e tloser then!foat from edge.
<br /> 5• Determine the Numher oJ Perjaration Spoces. Qivide the Length oj Latera (tine d)by the Per(o�atlon Spacfng (Une 2)and
<br /> round down to the nearest whote number.
<br /> Number of Per/orotlon Spoces = 6 i ft . 3 ft = ZO Spaces
<br /> 6. Number of Perjorations per Laterat ls equal to 1.0 plus the Number of Per ratlon 5paces {Line 5}.
<br /> Perforotions Per Lateraf = 2Q Spaces + 1 2i Perts.Per Laterat
<br /> Check tabte be(ow to vertfy the nnmber of perjorations per tateral gvaran ees less thqn a 10%dlscharge vartatlon. The volue fs
<br /> doubte ff the q center mQni(old Is used.
<br /> Maximwn N�nber of PerforaNass Per taterai to Guar ee<i�6 Oiubarge Vanatian
<br /> /�Inc P arahc�ns 1/31 Ench Perforatiom
<br /> Perforat'son Spacing(Feet) ���a`"��'`��"t�) perfora on Spacing Pipe Diam?ter{Inchry
<br /> 1 1b4 li4 2 3 ( eet) 1 i1G 134 2 3
<br /> t 10 t 3 18 30 60 2 11 16 2 f 3�f 68
<br /> 2« 8 t2 16 28 54 Y� 10 1�# 20 32 69
<br /> 3 $ f2 1b 25 52 3 9 1� f9 30 60
<br /> 3/1b trxi►Perforations 1/$Inch Perlorations
<br /> Pipe Diam?te�r(Irxiwsl �erfora S�ar.ing Pipe tJiameter(Inct�s)
<br /> Perforation Spac'sag(feet)
<br /> 1 1Y< iL� 1 3 � eet) I tY� 1Nt Z 3
<br /> 2 12 18 ,26 46 81 1 21 33 � 79 149
<br /> Z� f2 17 t� q4 80 li 20 30 dt 69 135
<br /> 3 f2 ib 22 37 75 3 20 29 38 64 E28
<br /> �• Totot Number of Pe�(oratior►s equals tne Number of AerforatJons per Later I (Line 6)multiplied by the Number of
<br /> Per;oretecf Loterals (Lirie 1).
<br /> 29 Pert.Per Lateral X ��Number of Yeri.L erais = b3 Totat Number of Perf.
<br /> _-- _ _ _ _ _ . . _. .
<br /> 8. tai<ulate the Squere Feet per Perjoratfon. Recommended vafue ls 4-f0 Jt Z per perjoratlon. ����^�^�-ia�
<br /> Does not appfy to At-Grades rr�ra.n�a,���
<br /> �NN(f1I .�� ��u �/�t ���
<br /> 8ed Area � 8ed Width(fq X Bed tength(ft) �.o• o.�s o.�i os� o.»
<br /> I.S O.it o.5i O_f9 O.f
<br /> �� ft X 63 ft = �i3� {tz aw axc o.ss o.eo �ua
<br /> ).S O.t9 O.[S O.P9 1.17
<br /> Squnre foot per Aer(oradon =8ed Area divided by the Totat Number oj Pe orotlons (Line 7). ,A o.z� o.s �,� ,.,,
<br /> 3. O.�t 0.9) �.ia� 1.�5
<br /> 630 ft2 . 63 pertorattons = 10.0 ft2/perforations ��� Q'�i�h3�164xhaol/4Y�4
<br /> eti.r�rlahll6�aAy,eet«+4bs
<br /> 9. SelectMln�mumAvern eNead: 't.0 ft t�{ ah��W�;!°t='�y��,'t�Yni�h)/�6
<br /> 3 ircn b��a L^ch pprtpr�{ba
<br /> s t«t aF�er`s1�UN,tvn�u aaiMSTTwhh tI!kM
<br /> peAorscb•�+
<br /> 1Q. Setect PerJora[ion Dlscharge (GPM)based on Tabte UI: 0,56 GPM per Perforation -
<br /> 11. Determine required Ftow Rate by mut[iplyirtg the Totat Nom6er of Perjorot ns (L1ne 7)by the Perforatlon Dlscharge (line 10).
<br /> �I
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