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I~ <br />~~ <br />156 <br />FALLING HEAD TEST Tesl N° Date l2-la-gg Project SAN LUtS <br />AII.U VtUt~l Engineer >=Dp R3~5 Borehole (', <br />Borehole co-ordinates 213446NizOyet}9~ Collar elevation 8600fT, <br />Depth to top of test section(t9.~y .O m Length of test section, 24•)~,3f m <br />Depth of static water level, Hw la.(;)5.6~.m Radius of borehole, r~1,89~) .0483 rn <br />Excess head, he j .~•)c.G~. m Radius of standpipe or casing, rc ossm <br /> <br />Time,? fmin) O I 2 4 S (9 ~ S 9 l0 l5 yd 25 30 45 <br />Depth to (FT1 <br />water, hw (m) O.O <br />O t2.t <br />3•~- t3.~) <br />4.0 (~r+Y) <br />.~ (t65) <br />5 0 4.B) <br />5•I (la. <br />52 (ta•5) <br />53 (t~,v <br />5 4 (t4.9) <br />5-5 t~•9 <br />5.5 (te.l C~8.2 (18.4 <br />-b US~~ <br />S•6 GB•G) <br />Excess head , <br />ht=Hw-hw Iml <br />5,6} <br />j.9g <br />1.68 <br />09 <br />o.Eyi <br />0.55 <br />0. <br />0.34 <br />428 <br />o.zl <br />0.21 <br />0.15 <br />0.1 <br />~Ob <br />.03 <br />• o <br />ht/ne 1.0 0.5 030 0.1 0.11 0.1 o. 0.06 0.05 -oy •o4 •v3 .02 01 .01 O <br /> <br />I <br />0 H ead - ti m e gr ap h ( s lo pe o f g rap h is S 1 <br />. <br /> <br />O <br />B <br />. <br /> <br /> <br />0 <br />6 ' <br />. <br /> <br /> t. I <br />0 <br />4 t <br />. - C <br />0 <br />3 <br />. <br />0 <br />2 <br />hr <br />n <br />. <br />e <br /> <br /> <br />o <br />i <br />( <br />. <br />5 <br />-. <br />) <br />3 <br />. <br /> <br />o <br />os <br />. <br /> <br /> <br />0 <br />06 <br />. <br /> <br /> <br />04 <br />0 <br />. <br />0 5 1 0 <br />T <br />im <br />e IS <br />- <br />m <br />in <br />ut <br />es 2 0 25 30 <br />t=p Cosinq t =t Calculations rz <br />'h <br />w <br />he <br />L <br />he= Hw <br />Hw hw <br />sw.~ nt <br />L <br />- hw ht = H <br />H <br />s.w~. <br /> <br />w- hw Permeability k =0.133 S (~) m/sec. <br /> <br />~~: O•U2,Strl <br />L= ~-31m <br />~f- 0.~5 FT STIC'rCU f~ <br />Fig B-3 - Proforma for falling head test. <br />