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Groundwater.Toolkit.xls

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Groundwater Assessments for Subdivision Developments Toolkit Version 1, June 2011 Nova Scotia Environment and Nova Scotia Department of Natural Resources Acknowlegements: CBCL Limited (Halifax, NS, Canada) David Scott (Environment Canterbury, Christchurch, New Zealand) provided the Theis solution used in the Well Interference Calculator . Disclaimer: These worksheets are supplied on an as-is basis. Nova Scotia Environment and Nova Scotia Department of Natural Resources offers no warranty, exp
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  Acknowlegements: CBCL Limited (Halifax, NS, Canada)David Scott (Environment Canterbury, Christchurch, New Zealand) provided the Theis solution used in the Well Interference Calculator . Disclaimer: The user assumes all risk for any damages whatsoever resulting from loss of use, data, or profits arising in connection with the access, use, quality, or performance of this software. Groundwater Assessments for Subdivision Developments ToolkitVersion 1, June 2011 Nova Scotia Environment and Nova Scotia Department of Natural Resources These worksheets are supplied on an as-is basis. Nova Scotia Environment and Nova Scotia Department of Natural Resources offers no warranty, expressed or implied, as to its accuracy or completeness and are not obligated to provide the user with any support, consulting, training or assistance of any kind with regard to its use, operation, and performance nor to provide the user with any updates, revisions, new versions or bug fixes .  Safe Yield Calculator  Farvolden MethodEquation B.1:Definitions: Q 20  = 20 year safe pumping rate for the well (m 3 /day)T = Transmissivity (m 2 /day)S f = Safety factor = 0.7 (no units)H  A  = Available head (m)Q = Pumping rate used during the pumping test (m 3 /day)S 100min = Drawdown observed in well during the pumping test at 100 minutes (m) Input data: T (m/day) =1.3H  A  (m) =70 Results: Q 20  (m 3 /day) =43.51Q 20  (L/min) =30.21 Notes: a.b. Total Volume Available From Well Storage and 2 Hour Yield (L)Equation B.3:Available Water (L) = 500 π(D/2000) 2  H A + 120Q 20 Input data: Well Diameter (mm) =150(S 20yrs  - S 100min ) theor   = The theoretical drawdown in the well after 20 years of pumping minus th the well at 100 minutes, based on the most appropriate theoretical equation for the aquifer, e. Values in the colour shaded cells can be updated by the user; all oth This workbook calculates a 20-year safe pumping rate for a well usin Farvolden, R.N. 1959. Groundwater supply in Alberta. Alberta Resea report.  Results:  Available Water (L) =4244.09  van der Kamp and Maathuis MethodEquation B.2:Definitions: Q 20  = 20 year safe pumping rate for the well (m 3 /day)T = Transmissivity (m 2 /day)S f = Safety factor = 0.7 (no units)H  A  = Available head (m)Q = Pumping rate used during the pumping test (m 3 /day)S 100min = Drawdown observed in well during the pumping test at Input data: Q (m/day) =   0.8879S 100 min (m) =H  A  (m) =70(S 20yrs  - S 100min ) theor   (m) = Results: Q 20  (m 3 /day) =43.51Q 20  (L/min) =30.21 Notes: a.b. Total Volume Available From Well Storage and 2 Hour Yield Equation B.3:Available Water (L) = 500 π(D/2000) 2  H A + 120Q 20 Input data: Well Diameter (mm) =150 e theoretical drawdown in g., Theis, Hantush, etc. (m) r cells are protected. g the method described in: rch Council. Unpublished (S 20yrs  - S 100min ) theor   = The theoretical drawdown in the well after drawdown in the well at 100 minutes, based on the most approp Theis, Hantush, etc. (m)This workbook calculates a 20-year safe described in: van der Kamp, G. and H. methods for determining sustainable gro Canadian Geotechnical and 7th Joint IA Conference. Saskatoon, SK, Canada.Values in the colour shaded cells can be protected.
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