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Radius of Influence(Coeffi. of Transmissibility) is the distance from a pumping well to the point where the drawdown becomes negligible or zero. Check FAQs
ric=rexp(2πTenvi(Hi-hw)Q0)
ric - Radius of Influence(Coeffi. of Transmissibility)?r - Radius of Well?Tenvi - Coefficient of Transmissibility?Hi - Initial Aquifer Thickness?hw - Depth of Water?Q0 - Discharge at Time t=0?π - Archimedes' constant?

Radius of Influence given Coefficient of Transmissibility Example

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Here is how the Radius of Influence given Coefficient of Transmissibility equation looks like with Values.

Here is how the Radius of Influence given Coefficient of Transmissibility equation looks like with Units.

Here is how the Radius of Influence given Coefficient of Transmissibility equation looks like.

7.5568Edit=7.5Editexp(23.14161.5Edit(2.48Edit-2.44Edit)50Edit)
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Radius of Influence given Coefficient of Transmissibility Solution

Follow our step by step solution on how to calculate Radius of Influence given Coefficient of Transmissibility?

FIRST Step Consider the formula
ric=rexp(2πTenvi(Hi-hw)Q0)
Next Step Substitute values of Variables
ric=7.5mexp(2π1.5m²/s(2.48m-2.44m)50m³/s)
Next Step Substitute values of Constants
ric=7.5mexp(23.14161.5m²/s(2.48m-2.44m)50m³/s)
Next Step Prepare to Evaluate
ric=7.5exp(23.14161.5(2.48-2.44)50)
Next Step Evaluate
ric=7.5567623880196m
LAST Step Rounding Answer
ric=7.5568m

Radius of Influence given Coefficient of Transmissibility Formula Elements

Variables
Constants
Functions
Radius of Influence(Coeffi. of Transmissibility)
Radius of Influence(Coeffi. of Transmissibility) is the distance from a pumping well to the point where the drawdown becomes negligible or zero.
Symbol: ric
Measurement: LengthUnit: m
Note: Value should be greater than 0.
Radius of Well
Radius of Well is defined as the distance from center of well to its outer boundary.
Symbol: r
Measurement: LengthUnit: m
Note: Value should be greater than 0.
Coefficient of Transmissibility
Coefficient of Transmissibility is defined as the rate of flow of water in gallons per day through a vertical strip of the aquifer.
Symbol: Tenvi
Measurement: Kinematic ViscosityUnit: m²/s
Note: Value should be greater than 0.
Initial Aquifer Thickness
Initial Aquifer Thickness is the aquifer thickness at initial stage before pumping.
Symbol: Hi
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 at Time t=0
Discharge at Time t=0 is the rate of flow of a liquid that moves over a designated point over a fixed period.
Symbol: Q0
Measurement: Volumetric Flow RateUnit: m³/s
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 Influence(Coeffi. of Transmissibility)

​Go Radius of Influence given Coefficient of Transmissibility with Base 10
ric=r102.72Tenvi(Hi-hw)Qli

Other formulas in Radius of Influence category

​Go Radius of Influence given Discharge in Confined Aquifer
Rid=rexp(2πKWHbp(Hi-hw)Q0)
​Go Radius of Influence given Discharge in Confined Aquifer with Base 10
Rid=r102.72KWHbp(Hi-hw)Q0
​Go Radius of Influence given Confined Aquifer Discharge
Rw=rexp(2πKWHbpstQli)
​Go Radius of Influence given Confined Aquifer Discharge with Base 10
Rw=r102.72KWHbpstQli

How to Evaluate Radius of Influence given Coefficient of Transmissibility?

Radius of Influence given Coefficient of Transmissibility evaluator uses Radius of Influence(Coeffi. of Transmissibility) = Radius of Well*exp((2*pi*Coefficient of Transmissibility*(Initial Aquifer Thickness-Depth of Water))/Discharge at Time t=0) to evaluate the Radius of Influence(Coeffi. of Transmissibility), The Radius of Influence given Coefficient of Transmissibility formula is defined as the value of radius of influence when we have prior information of coefficient of transmissibility. Radius of Influence(Coeffi. of Transmissibility) is denoted by ric symbol.

How to evaluate Radius of Influence given Coefficient of Transmissibility using this online evaluator? To use this online evaluator for Radius of Influence given Coefficient of Transmissibility, enter Radius of Well (r), Coefficient of Transmissibility (Tenvi), Initial Aquifer Thickness (Hi), Depth of Water (hw) & Discharge at Time t=0 (Q0) and hit the calculate button.

FAQs on Radius of Influence given Coefficient of Transmissibility

What is the formula to find Radius of Influence given Coefficient of Transmissibility?
The formula of Radius of Influence given Coefficient of Transmissibility is expressed as Radius of Influence(Coeffi. of Transmissibility) = Radius of Well*exp((2*pi*Coefficient of Transmissibility*(Initial Aquifer Thickness-Depth of Water))/Discharge at Time t=0). Here is an example- 7.556762 = 7.5*exp((2*pi*1.5*(2.48-2.44))/50).
How to calculate Radius of Influence given Coefficient of Transmissibility?
With Radius of Well (r), Coefficient of Transmissibility (Tenvi), Initial Aquifer Thickness (Hi), Depth of Water (hw) & Discharge at Time t=0 (Q0) we can find Radius of Influence given Coefficient of Transmissibility using the formula - Radius of Influence(Coeffi. of Transmissibility) = Radius of Well*exp((2*pi*Coefficient of Transmissibility*(Initial Aquifer Thickness-Depth of Water))/Discharge at Time t=0). This formula also uses Archimedes' constant and Exponential Growth Function function(s).
What are the other ways to Calculate Radius of Influence(Coeffi. of Transmissibility)?
Here are the different ways to Calculate Radius of Influence(Coeffi. of Transmissibility)-
  • Radius of Influence(Coeffi. of Transmissibility)=Radius of Well*10^((2.72*Coefficient of Transmissibility*(Initial Aquifer Thickness-Depth of Water))/Discharge of Liquid)OpenImg
Can the Radius of Influence given Coefficient of Transmissibility be negative?
No, the Radius of Influence given Coefficient of Transmissibility, measured in Length cannot be negative.
Which unit is used to measure Radius of Influence given Coefficient of Transmissibility?
Radius of Influence given Coefficient of Transmissibility is usually measured using the Meter[m] for Length. Millimeter[m], Kilometer[m], Decimeter[m] are the few other units in which Radius of Influence given Coefficient of Transmissibility can be measured.
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