Equation for Well Parameter Calculator

✖Distance from Pumping Well to the point where drawdown occurs.ⓘ Distance from Pumping Well [r]			+10% -10%
✖Storage Coefficient is the volume of water released from storage per unit decline in hydraulic head in the aquifer, per unit area of the aquifer.ⓘ Storage Coefficient [S]			+10% -10%
✖Transmissivity is the rate at which groundwater flows horizontally through an aquifer or the degree to which a medium allows something, in particular electromagnetic radiation, to pass through it.ⓘ Transmissivity [T]			+10% -10%
✖Time Period (pumping has been in Progress) or Time can be defined as the ongoing and continuous sequence of events that occur in succession, from the past through the present to the future.ⓘ Time Period [t]			+10% -10%

✖Well Parameter for the unsteady flow in confined aquifer. Confined aquifers are permeable rock units that are usually deeper under the ground than unconfined aquifers.ⓘ Equation for Well Parameter [u]

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Formula

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Equation for Well Parameter

Formula

`"u" = ("r"^2*"S")/(4*"T"*"t")`

Example

`"0.579545"=(("3m")^2*"85")/(4*"11m²/s"*"30s")`

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Equation for Well Parameter Solution

STEP 0: Pre-Calculation Summary

Formula Used

Well Parameter = (Distance from Pumping Well^2*Storage Coefficient)/(4*Transmissivity*Time Period)
u = (r^2*S)/(4*T*t)
This formula uses 5 Variables

Variables Used

Well Parameter - Well Parameter for the unsteady flow in confined aquifer. Confined aquifers are permeable rock units that are usually deeper under the ground than unconfined aquifers.
Distance from Pumping Well - (Measured in Meter) - Distance from Pumping Well to the point where drawdown occurs.
Storage Coefficient - Storage Coefficient is the volume of water released from storage per unit decline in hydraulic head in the aquifer, per unit area of the aquifer.
Transmissivity - (Measured in Square Meter per Second) - Transmissivity is the rate at which groundwater flows horizontally through an aquifer or the degree to which a medium allows something, in particular electromagnetic radiation, to pass through it.
Time Period - (Measured in Second) - Time Period (pumping has been in Progress) or Time can be defined as the ongoing and continuous sequence of events that occur in succession, from the past through the present to the future.

STEP 1: Convert Input(s) to Base Unit

Distance from Pumping Well: 3 Meter --> 3 Meter No Conversion Required
Storage Coefficient: 85 --> No Conversion Required
Transmissivity: 11 Square Meter per Second --> 11 Square Meter per Second No Conversion Required
Time Period: 30 Second --> 30 Second No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

u = (r^2*S)/(4*T*t) --> (3^2*85)/(4*11*30)

Evaluating ... ...

u = 0.579545454545455

STEP 3: Convert Result to Output's Unit

0.579545454545455 --> No Conversion Required

FINAL ANSWER

0.579545454545455 ≈ 0.579545 <-- Well Parameter

(Calculation completed in 00.004 seconds)

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< 11 Unsteady Flow in a Confined Aquifer Calculators

Equation for Drawdown

Go Total Drawdown = (Discharge/(4*pi*Transmissivity))*ln((2.2*Transmissivity*Time Period)/(Distance from Pumping Well^2*Storage Coefficient))

Drawdown at Time Interval 't1'

Go Drawdown at time interval t1 = Drawdown at time interval t2-((Discharge/(4*pi*Transmissivity))*ln(Time of Drawdown (t2)/Time of Drawdown (t1)))

Drawdown at Time Interval 't2'

Go Drawdown at time interval t2 = ((Discharge/(4*pi*Transmissivity))*ln(Time of Drawdown (t2)/Time of Drawdown (t1)))+Drawdown at time interval t1

Equation for Well Function series to number of 4 digits

Go Well Function of u = -0.577216-ln(Well Parameter)+Well Parameter-(Well Parameter^2/2.2!)+(Well Parameter^3/3.3!)

Equation for Well Parameter

Go Well Parameter = (Distance from Pumping Well^2*Storage Coefficient)/(4*Transmissivity*Time Period)

Distance from Pumping Well given Storage Coefficient

Go Distance from Pumping Well = sqrt((2.25*Transmissivity*Starting Time/Storage Coefficient))

Initial Time given Pumping Well along with Storage Coefficient

Go Starting Time = (Storage Coefficient*Distance from Pumping Well^2)/(2.25*Transmissivity)

Transmissivity about given storage coefficient

Go Transmissivity = (Storage Coefficient*Distance from Pumping Well^2)/(2.25*Starting Time)

Equation for Storage Coefficient

Go Storage Coefficient = 2.25*Transmissivity*Starting Time/Distance from Pumping Well^2

Initial Constant Piezometric Head given drawdown

Go Initial constant Piezometric Head = Possible Drawdown in Confined Aquifer+Drawdown at time t

Drawdown given Piezometric Head

Go Possible Drawdown in Confined Aquifer = Initial constant Piezometric Head-Drawdown at time t

Equation for Well Parameter Formula

Well Parameter = (Distance from Pumping Well^2*Storage Coefficient)/(4*Transmissivity*Time Period)
u = (r^2*S)/(4*T*t)

What is Drawdown in Hydrology?

Drawdown is a change in groundwater level due to an applied stress, caused by events such as: Pumping from a well. Pumping from a neighboring well. Intensive water taking from local area. Seasonal declines as recharge rates lower.

How to Calculate Equation for Well Parameter?

Equation for Well Parameter calculator uses Well Parameter = (Distance from Pumping Well^2*Storage Coefficient)/(4*Transmissivity*Time Period) to calculate the Well Parameter, Equation for Well Parameter is an essential property of the well function represented by a number if series to significant digits, rarely exceeding 4. Well Parameter is denoted by u symbol.

How to calculate Equation for Well Parameter using this online calculator? To use this online calculator for Equation for Well Parameter, enter Distance from Pumping Well (r), Storage Coefficient (S), Transmissivity (T) & Time Period (t) and hit the calculate button. Here is how the Equation for Well Parameter calculation can be explained with given input values -> 0.579545 = (3^2*85)/(4*11*30).

FAQ

What is Equation for Well Parameter?

Equation for Well Parameter is an essential property of the well function represented by a number if series to significant digits, rarely exceeding 4 and is represented as u = (r^2*S)/(4*T*t) or Well Parameter = (Distance from Pumping Well^2*Storage Coefficient)/(4*Transmissivity*Time Period). Distance from Pumping Well to the point where drawdown occurs, Storage Coefficient is the volume of water released from storage per unit decline in hydraulic head in the aquifer, per unit area of the aquifer, Transmissivity is the rate at which groundwater flows horizontally through an aquifer or the degree to which a medium allows something, in particular electromagnetic radiation, to pass through it & Time Period (pumping has been in Progress) or Time can be defined as the ongoing and continuous sequence of events that occur in succession, from the past through the present to the future.

How to calculate Equation for Well Parameter?

Equation for Well Parameter is an essential property of the well function represented by a number if series to significant digits, rarely exceeding 4 is calculated using Well Parameter = (Distance from Pumping Well^2*Storage Coefficient)/(4*Transmissivity*Time Period). To calculate Equation for Well Parameter, you need Distance from Pumping Well (r), Storage Coefficient (S), Transmissivity (T) & Time Period (t). With our tool, you need to enter the respective value for Distance from Pumping Well, Storage Coefficient, Transmissivity & Time Period and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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