Laserfiche WebLink
= CTL I THOMPSON <br /> <br /> <br />Project No.: <br />Project Name: <br />Test Location: <br />Date: <br />FALLING HEAD FIELD TEST FOR PERMEABILITY <br />FC04797-145 <br />Goose Haven <br />TH-44 -? r--Dp <br />10/14/2009 <br />Borehole Diameter (Db) = 3.50 in <br />Pipe Diameter (DP) = 2 in <br />Borehole Depth (HT) = 8 ft <br />Initial Water Measurement(h,o) = 0.92 ft <br />Final Water Measurement (htt) = 4.9 ft <br />H = 5.1 ft <br />Total Time of Test (t) = 60 min <br />?Db <br />(NTS) <br />Assumptions Calulations <br />Gravel Void Ratio (e) = 0.8 Porosi : <br />Dimensional Constant (CP) = 22,000 e <br /> n= <br />l+e <br /> Volume of Water Lost: <br /> VOT = pipe +Vgrnvel <br /> J? 2 <br />b 7lD Z <br />?° Z <br />b <br /> - <br />+ <br />)n]] <br />* (hf - hro ) <br />V OT <br />oT - <br /> 4 4 4 <br /> Permeability <br /> k=C *Q_C *V.Tlc <br />° <br />° <br /> h <br />H <br />Answers <br />Porosity (n) = 0.44 <br />Total Change in VolumeVOT = 287.4 in' <br />Permeability (k) = 89.0 ft/yr <br />Permeability (k) = 0.244 ft'/day/fiz <br />Permeability (k) = 8.6E-05 cm/sec <br />McLAUGHLIN WATER ENGINEERS, LTD <br />GOOSE HAVEN RESERVOIR COMPLEX EXPANSION <br />CTLLIT PROJECT NO. FC04797-145 <br />HT 17 <br />H <br />FIGURE D-2