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The radius of well refers to the horizontal distance from the center of the well to its inner wall, essentially the well’s radius. Check FAQs
r=R2exp(2πKb(H-hw)Qt)B
r - Radius of Well?R - Radius of Influence?K - Coefficient of Permeability?b - Aquifer Thickness?H - Initial Piezometric Surface?hw - Depth of Water?Qt - Discharge by Each Well when Two Well Interference?B - Distance Between Wells?π - Archimedes' constant?

Radius of Well when Interference among well is present Example

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Here is how the Radius of Well when Interference among well is present equation looks like with Values.

Here is how the Radius of Well when Interference among well is present equation looks like with Units.

Here is how the Radius of Well when Interference among well is present equation looks like.

2961.9327Edit=100Edit2exp(23.14160.105Edit15Edit(20Edit-2.44Edit)12.26Edit)2.93Edit
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Radius of Well when Interference among well is present Solution

Follow our step by step solution on how to calculate Radius of Well when Interference among well is present?

FIRST Step Consider the formula
r=R2exp(2πKb(H-hw)Qt)B
Next Step Substitute values of Variables
r=100m2exp(2π0.105cm/s15m(20m-2.44m)12.26m³/s)2.93m
Next Step Substitute values of Constants
r=100m2exp(23.14160.105cm/s15m(20m-2.44m)12.26m³/s)2.93m
Next Step Convert Units
r=100m2exp(23.14160.001m/s15m(20m-2.44m)12.26m³/s)2.93m
Next Step Prepare to Evaluate
r=1002exp(23.14160.00115(20-2.44)12.26)2.93
Next Step Evaluate
r=2961.93272932216m
LAST Step Rounding Answer
r=2961.9327m

Radius of Well when Interference among well is present Formula Elements

Variables
Constants
Functions
Radius of Well
The radius of well refers to the horizontal distance from the center of the well to its inner wall, essentially the well’s radius.
Symbol: r
Measurement: LengthUnit: m
Note: Value should be greater than 0.
Radius of Influence
The radius of influence is the distance from a pumping well to the point where the drawdown, or lowering of the water table, becomes negligible.
Symbol: R
Measurement: LengthUnit: m
Note: Value should be greater than 0.
Coefficient of Permeability
Coefficient of Permeability refers to the ease with which water can flow through the aquifer's pore spaces.
Symbol: K
Measurement: SpeedUnit: cm/s
Note: Value should be greater than 0.
Aquifer Thickness
Aquifer Thickness (at Midpoint between Equipotential lines) or otherwise is the thickness of aquifer in which the pore spaces of rock forming the aquifer may or may not be with water.
Symbol: b
Measurement: LengthUnit: m
Note: Value can be positive or negative.
Initial Piezometric Surface
The initial piezometric surface refers to the level at which groundwater naturally stands in a confined aquifer before any pumping or external influence.
Symbol: H
Measurement: LengthUnit: m
Note: Value should be greater than 0.
Depth of Water
Depth of Water is the depth in the well measured above the impermeable layer.
Symbol: hw
Measurement: LengthUnit: m
Note: Value should be greater than 0.
Discharge by Each Well when Two Well Interference
Discharge by Each Well when Two Well Interference is the sum of the individual well rates, adjusted for interference.
Symbol: Qt
Measurement: Volumetric Flow RateUnit: m³/s
Note: Value should be greater than 0.
Distance Between Wells
Distance Between Wells refers to the center to center distance between the well.
Symbol: B
Measurement: LengthUnit: m
Note: Value should be greater than 0.
Archimedes' constant
Archimedes' constant is a mathematical constant that represents the ratio of the circumference of a circle to its diameter.
Symbol: π
Value: 3.14159265358979323846264338327950288
exp
n an exponential function, the value of the function changes by a constant factor for every unit change in the independent variable.
Syntax: exp(Number)

Other Formulas to find Radius of Well

​Go Radius of Well when Interference among three well is present
r=R3exp(2πKb(H-hw)Qth)B2

Other formulas in Interference Among Wells category

​Go Discharge through Each Well when Interference among Well is Present
Qt=2πKb(H-hw)log(R2rB,e)
​Go Coefficient of Permeability when Interference among Well is Present
K=Qtlog(R2rB,e)2πb(H-hw)

How to Evaluate Radius of Well when Interference among well is present?

Radius of Well when Interference among well is present evaluator uses Radius of Well = (Radius of Influence^2)/(exp((2*pi*Coefficient of Permeability*Aquifer Thickness*(Initial Piezometric Surface-Depth of Water))/Discharge by Each Well when Two Well Interference)*Distance Between Wells) to evaluate the Radius of Well, Radius of Well when Interference among well is present formula is defined as a measure of the effective radius of a well in a multi-well system, considering the interference effects between wells on the flow of fluid in the reservoir. Radius of Well is denoted by r symbol.

How to evaluate Radius of Well when Interference among well is present using this online evaluator? To use this online evaluator for Radius of Well when Interference among well is present, enter Radius of Influence (R), Coefficient of Permeability (K), Aquifer Thickness (b), Initial Piezometric Surface (H), Depth of Water (hw), Discharge by Each Well when Two Well Interference (Qt) & Distance Between Wells (B) and hit the calculate button.

FAQs on Radius of Well when Interference among well is present

What is the formula to find Radius of Well when Interference among well is present?
The formula of Radius of Well when Interference among well is present is expressed as Radius of Well = (Radius of Influence^2)/(exp((2*pi*Coefficient of Permeability*Aquifer Thickness*(Initial Piezometric Surface-Depth of Water))/Discharge by Each Well when Two Well Interference)*Distance Between Wells). Here is an example- 2961.933 = (100^2)/(exp((2*pi*0.00105*15*(20-2.44))/12.26)*2.93).
How to calculate Radius of Well when Interference among well is present?
With Radius of Influence (R), Coefficient of Permeability (K), Aquifer Thickness (b), Initial Piezometric Surface (H), Depth of Water (hw), Discharge by Each Well when Two Well Interference (Qt) & Distance Between Wells (B) we can find Radius of Well when Interference among well is present using the formula - Radius of Well = (Radius of Influence^2)/(exp((2*pi*Coefficient of Permeability*Aquifer Thickness*(Initial Piezometric Surface-Depth of Water))/Discharge by Each Well when Two Well Interference)*Distance Between Wells). This formula also uses Archimedes' constant and Exponential Growth (exp) function(s).
What are the other ways to Calculate Radius of Well?
Here are the different ways to Calculate Radius of Well-
  • Radius of Well=(Radius of Influence^3)/(exp((2*pi*Coefficient of Permeability*Aquifer Thickness*(Initial Piezometric Surface-Depth of Water))/Discharge by Each Well at Three Well Interference)*Distance Between Wells^2)OpenImg
Can the Radius of Well when Interference among well is present be negative?
No, the Radius of Well when Interference among well is present, measured in Length cannot be negative.
Which unit is used to measure Radius of Well when Interference among well is present?
Radius of Well when Interference among well is present is usually measured using the Meter[m] for Length. Millimeter[m], Kilometer[m], Decimeter[m] are the few other units in which Radius of Well when Interference among well is present can be measured.
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