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WATER WELL DESIGN TOOLKIT v1.2.1 |
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Contents List
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Form or Calculator name
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Code
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Contents
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Background Information
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Site information
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BI/1
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Details of site owner, location etc.
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Existing information
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BI/2
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Information from existing wells in the area/aquifer.
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Aquifer information
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BI/3
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Information on aquifer type and conditions.
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Layer information
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BI/4
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Lithological descriptions (up to 5 layers).
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Water chemistry
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BI/5
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Chemical analysis data for common constituents influencing well
design.
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Pumping Rate and Tests
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BI/6
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Information on:
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a) well yield requirements
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b) pumping test results from exploratory borehole(s):
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- constant rate aquifer test
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- production test (up to 7 steps)
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- packer test (up to 5 depth intervals)
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c) aquifer properties
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d) drawdown components
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Casing Materials
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PVC pipe
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CM/1
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Calculates weight and collapse strength of PVC casing in metric or
US units.
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Weight steel
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CM/2
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Calculates weight of mild and stainless steel casing in metric or US
units.
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Collapse strength steel
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CM/3
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Calculates collapse strength of mild and stainless steel casing in
metric or US units.
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Yield point steel
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CM/4
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Calculates yield strength of mild and stainless steel casing in
metric or US units.
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Corrosion/Incrustation Indicator
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Ryznar Stability Index (RSI)
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C/1
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Calculates RSI. Includes charts of S and C values.
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Costs and Bill of Quantities
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Pump horsepower
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CQ/1
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Calculates water, brake and input horsepower in metric or US units.
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Includes pressure to head converter and motor horsepower calculator.
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Electric pump
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CQ/2
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Calculates annual pumping cost, pumping costs per hour and volume of
water of
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an electric pump in £, Euros or $.
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Diesel engine operated pump
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CQ/3
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Calculates annual pumping cost, pumping costs per hour and per
volume of water
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of a diesel engine driven pump in £, Euros or $. Also calculates
fuel consumption.
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Capital and operating costs
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CQ/4
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Calculates capital cost of a well, monthly and total loan repayment,
total annual
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operating costs and cost of water per hour and unit volume with and
without loan.
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The loan cost calculator can be used for any combination of loan
amount, fixed
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interest rate and loan period.
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Water costs can be shown in metric or US units and currency can be
selected from
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£, Euros or $.
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Bill of Quantities
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CQ/5
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Bill of Quantities to calculate item and total costs for quotations
or to estimate well
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construction costs in metric or US units.
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Allows up to 5 different hole, casing and/or screen diameters.
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Development
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Air lift pumping
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D/1
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Calculates in metric or US units:
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- pumping submergence
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- minimum pressure required to start air-lift (with
safety factor)
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- minimum volume required for selected pumping rate.
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Includes Table in metric and US units giving recommended eductor
pipe and air-line
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sizes for air-lift pumping at different rates.
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Includes charts in metric and US units showing approximate pumping
submergence
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for optiumum air-lift efficiency.
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High velocity jetting
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D/2
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Calculates velocity and discharge for high velocity (hydraulic) jet
in metric or US units.
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Grain Size Analysis for Screen Slot Size and Pack
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Cumulative percentage
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GSA/1
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Calculates cumulative percentage retained or passing for sieve sizes
expressed in
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log phi units, mm, '000in, US Standard Sieves and Taylor Equivalent.
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Grain size data
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GSA/2
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Table to enter sieve size in mm or '000 inch and cumulative
percentage retained
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or passing.
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Data can be entered for up to 15 sieve sizes per table. Data are
plotted automatically
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on each chart with a smoothed line through the data.
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Six tables are provided allowing up to six distribution curves on
each chart.
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Includes converter from metric and US to phi units.
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metric log chart retained
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GSA/3a
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Grain size distribution chart for metric sieve sizes (mm) and
cumulative percentage
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retained data from which percentiles can be extracted to GSA/4 or
used to select
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the slot size for a natural pack.
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metric log chart passing
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GSA/3b
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Grain size distribution chart for metric sieve sizes (mm) and
cumulative percentage
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passing data from which percentiles can be extracted to GSA/4 or
used to select
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the slot size for a natural pack.
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US log chart retained
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GSA/3c
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Grain size distribution chart for US units in thousands of an inch
and cumulative
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retained data from which percentiles can be extracted to GSA/4 or
used to select
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the slot size for a natural pack.
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log phi chart passing
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GSA/3d
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Grain size distribution chart for phi (Ф) sieve sizes and cumulative
percentage
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passing data.
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Percentiles and pack
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GSA/4
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Table to enter grain size values as percentage passing or retained
from charts
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GSA/3 a to c to show the effective size (Es) and uniformity
co-efficient (Uc) for
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each sample and for pack design from P-A ratios.
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Pack data are automatically plotted on GSA /3a to 3d.
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Subjective sample reliability can be included. Maximum 6 samples.
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Pack ratio methods
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GSA/5
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Calculates key pack grain size diameter values (passing) in mm or
'000 inch using
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a and b
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different published techniques for pack design. Similar to GSA/4.
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Tests for poor sorting and aquifer collapse and calculates passing
or retained pack
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grain size diameter values in mm or '000 inch based on Terzaghi's
Rule.
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Hydraulic Criteria
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Approach velocity Av
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HC/1
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Calculates in metric or US units:
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- upper limit of Av based on hydraulic conductivity
(Sichardt and Husiman methods)
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or d40 grain size (Gross method)
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- screen diameter for given screen length to satisfy
Av based on Sichardt, Huisman
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or Gross methods.
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Reynolds Number Re
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HC/2
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Calculates Reynolds Number from d50 grain size in metric or US
units.
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Uphole velocity Uv
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HC/3
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Calculates in metric or US units:
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- minimum diameter of casing or screen required to
maintain Uv at <150 cm/s (5 ft/s)
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for a chosen discharge rate
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- uphole velocity for a chosen casing internal
diameter and discharge rate
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- maximum discharge rate for a chosen casing diameter
for Uv of 150 cm/s (5 ft/s).
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- uphole head losses.
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Includes Table of maximum discharge rates in metric or US units for
selected
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diameters of standard-weight casing based on maximum Uv of 150 cm/s
(5 ft/s).
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Open area, Entrance Velocity
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HC/4
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Calculates open area (Ao), entrance velocity (Ev) and transmitting
capacity (Tc) in
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and Transmitting Capacity of
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metric or US units of slotted or shutter (louver) screen together
with maximum screen
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slotted and louvered screen
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length for Ev and minimum screen diameter for Uv.
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Includes Tables in metric and US units of recommended pump casing
diameters for
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different discharge rates and for line shaft pumps and recommended
Ev for different
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hydraulic conductivities.
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Open area, Entrance Velocity
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HC/5
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Calculates open area (Ao), entrance velocity (Ev) and transmitting
capacity (Tc) in
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and Transmitting Capacity of
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metric or US units of continuous slot (wire-wrapped) screen together
with maximum
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continuous slot screen
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screen length for Ev and minimum screen diameter for Uv.
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Includes charts of representative open areas for continuous slot
screen in
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metric and US units and Tables of recommended Ev limits for
different K values and
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recommended pump casing diameters for different discharge rates and
for line shaft pumps in metric and US units.
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Recharge Rate and Head
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Recharge rate and head
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RR/1
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Calculates in metric or US units for recharge (injection) wells in
confined or
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unconfined aquifer:
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- recharge (injection) rate
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- maximum allowable positive (recharge) head
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Steel Screen Materials
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Collapse continuous slot
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SSM/1
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Calculates collapse strength of continuous slot screen in metric or
US units.
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Yield point continuous slot
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SSM/2
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Calculates yield point of continuous slot screen in metric or US
units.
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Collapse shutter
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SSM/3
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Calculates collapse strength of shutter screen in metric or US
units.
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Yield point shutter
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SSM/4
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Calculates yield point of factory slotted or shutter screen in
metric or US units.
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Volume and Annular Volume
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Volume and annular volume
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V/1
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Calculates in metric or US units:
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- volume of casing, screen, drilled hole etc
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- annular volume between casing and open hole, etc.
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Design Summary
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Results Summary
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DS/1
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Summary of the results calculated from the different Topics
(excluding GSA).
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Units Converter
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Units converter
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UC/1
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Calculator to convert metric to US or US to metric units for some
common hydrogeological parameters
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© 2008 Well Systems Design (www.waterwelldesign.com)
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Terms and Conditions of Use apply.
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