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OSTP Pressure Distribution <br /> UNIVERSITY h �.; � <br /> Minnesota Poltution Design Worksheet OF MINNESOTA �^ �' AM <br /> Control A enc `�-1\� <br /> ProjectiD: v 11.09.22 <br /> 1. Select Number of Perforated Laterals in systemlzone: �i� __. .. <br /> i��u�L�l�.�l.������..li�.n <br /> (2 feet is minlmum and 3 feet is maxfmum spacing) _ <br /> 2. Select Perforotion Spacing: 3.0 ft „ - �= '� ,';" "". • • ' Y -- <br /> r Mu�u��ui�� I _ <br /> 3. Select Perforation Diometer Size 7/32 in ,. V,•�����:���<�„�•�,:,�,..,? .,�,...� , ,.�����k ,�- <br /> R'��1 r�nk <br /> 4. Length of Latera(s =Media Bed Length-2 Feet. '"''�,.�"�^°'�;,,' ' ^'',� ''�''w..,;���°«��^�,' ,^'' <br /> 63 - 2�t = 61 ft Perforation can not be c(oser then i foot from edge. <br /> 5• Determine the Number of Perforation Spaces. Divide the�ength of l.oterals (Line 4)by the Perforation Spacing (Line 2)and <br /> round down to the nearest whole number. <br /> Number of Perforation Spaces = 61 ft .- �ft = 20 Spaces <br /> 6. Number of Perforotions per Lateral is equal to 1.0 plus the Number of Perforation Spaces (Line 5). <br /> Perforations Per Latera! = 20 Spaces + 1 = 21 Perfs. Per Lateral <br /> Check tab(e be(ow to ver�fy the number of perforotions per laternl guorantees less thon o f0%discharge vor�atfon. The value is <br /> doubte if the a center manifo(d fs used. <br /> Maxim�n Numbe�of Perfaatians Pe�Lateral to Guarantee t 10�6 Qischarge Yuiuion <br /> +Irx P . a-ahons 7;321ncnPerforatiorn <br /> Pipe Diarneter Ilnchezl Perforation Spacing Pipe Diameter flnches) <br /> Perforat�on Spac:ng IFeet) <br /> i tYl 1i" 2 3 (Feet) 1 lk 11: 2 3 <br /> Z 10 13 1$ 30 60 2 11 16 it 34 68 <br /> 2►: 8 13 16 26 54 2f 10 14 1a 32 64 <br /> 3 8 12 16 25 52 3 4 14 19 30 60 <br /> 3:`16 Inch Pertoratiorts 1.'81nch Perforatimns <br /> Pipe Diameter tlnchesl Perforation Spacing Pipe Diameter finches) <br /> Pe�forat�n Spacmg fFeet) <br /> 1 it•; 1�: 2 3 IFeet) 1 th t�: 2 3 <br /> 2 12 18 2b 46 87 2 2i 33 44 7� 144 <br /> 1ti� tt t7 24 44 80 7'�: 20 30 41 59 t35 <br /> 3 12 16 22 37 75 3 20 29 38 64 128 <br /> 7• Tota(Number of Perforations equals the Number of Perforalions per LQteral (Line 6)multiplied by the Number of <br /> Perfornted Laterals (Line 1). <br /> 21 Perf. Per Lateral X �Number of Perf. Laterals = 63 Total Number of Perf. <br /> 8. Calculate the Squore Feet per Perforation. Recommended volue fs 4-10 ftZ per perforation. °1`°""°^D1S`"'�p'6PM' <br /> Does not oppl y to At-GrAdes „�„�{„ `p�°`�"°°D1a�`� <br /> ,,� ,,,. -,� .,. <br /> Bed Area = Bed Width(ft)X Bed Length(ft) - <br /> ,.o• o.,s o.., o.» o.�. <br /> 1.5 0.22 O.S7 O.i9 0.9 <br /> 10 ft x 63 ft = 630 ftZ i°' °.m °." °.°° ,.°` <br /> 2.5 �.29 �.65 0.H9 ,.,� <br /> 3.0 O.12 0.72 0.98 7.28 <br /> Squnre Foot per Perforation =Bed Area divided by the Tota!Number oj Perforations (Line 7). �•� �.37 a.e7 +.73 �.+� <br /> 5.0' p,11 0.91 7.36 1.63 <br /> A'K�IIn�w1{M 1/16��Ct1 to I/�Irch <br /> 630 ft2 . 63 perforations � ��.0 ftZ/perforations �f�� Oertora[bns <br /> Dwellings wiN�i8 inch peAorotiom <br /> 2 feet pcher estadistmrnts and MS75 wtc�;�i6 <br /> 9. Select Minimum Averoge Head: 1.0 fL irc�co�/�inch D�rtora[bra <br /> 5 feec �a�r ccaMisnments and N5T5 with i/8 inch <br /> pMorecio�a <br /> 10. Select Perforation Discharge (GPM)based on Table III: 0.56 GPM per Perforation <br /> 11• Determine required Flow Rote by multiplying the Total Number of Perforations (Line 7)by the Perforation Discharge (Line 1Q). <br />