Transmissivity derived from time drawdown graphs Solution

STEP 0: Pre-Calculation Summary
Formula Used
Transmissivity = (2.3*Pumping Rate)/(4*pi*Drawdown Across One Log Cycle)
τ = (2.3*Q)/(4*pi*Δs)
This formula uses 1 Constants, 3 Variables
Constants Used
pi - Archimedes' constant Value Taken As 3.14159265358979323846264338327950288
Variables Used
Transmissivity - (Measured in Square Meter per Second) - Transmissivity describes the ability of the to transmit groundwater throughout its entire saturated thickness.
Pumping Rate - (Measured in Cubic Meter per Second) - Pumping Rate is the actual volumetric pumping rate.
Drawdown Across One Log Cycle - Drawdown Across One Log Cycle from Time-drawdown graphs.
STEP 1: Convert Input(s) to Base Unit
Pumping Rate: 7 Cubic Meter per Second --> 7 Cubic Meter per Second No Conversion Required
Drawdown Across One Log Cycle: 44.55 --> No Conversion Required
STEP 2: Evaluate Formula
Substituting Input Values in Formula
τ = (2.3*Q)/(4*pi*Δs) --> (2.3*7)/(4*pi*44.55)
Evaluating ... ...
τ = 0.0287586373039227
STEP 3: Convert Result to Output's Unit
0.0287586373039227 Square Meter per Second --> No Conversion Required
FINAL ANSWER
0.0287586373039227 0.028759 Square Meter per Second <-- Transmissivity
(Calculation completed in 00.004 seconds)

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8 Time-Drawdown Analysis Calculators

Distance from pumping well to observation well
Go Distance from Pumping Well = sqrt((2.25*Transmissivity*Time at the Point of Intersection)/Storage Coefficient)
Time at which Steady Shape Conditions Develop
Go Time at Which Steady-shape Conditions Develop = (7200*Distance from Pumping Well^2*Storage Coefficient)/Transmissivity
Storage Coefficient given time at which Steady Shape conditions develops
Go Storage Coefficient = Transmissivity*Time at Which Steady-shape Conditions Develop/7200*Distance from Pumping Well^2
Modified equation for storage coefficient from time drawdown graphs
Go Storage Coefficient = (Transmissivity*Time at the Point of Intersection)/(640*Distance from Pumping Well^2)
Transmissivity derived from time drawdown graphs
Go Transmissivity = (2.3*Pumping Rate)/(4*pi*Drawdown Across One Log Cycle)
Equation for drawdown across one log cycle
Go Drawdown Across Log Cycle = (2.3*Pumping Rate)/(Transmissivity*4*pi)
Equation for pumping rate of transmissivity from time drawdown graphs
Go Pumping Rate = (Transmissivity*4*pi*Drawdown Across Log Cycle)/2.3
Modified equation for transmissivity from time drawdown graphs
Go Transmissivity = 35*Pumping Rate/Drawdown Across One Log Cycle

Transmissivity derived from time drawdown graphs Formula

Transmissivity = (2.3*Pumping Rate)/(4*pi*Drawdown Across One Log Cycle)
τ = (2.3*Q)/(4*pi*Δs)

What is Transmissivity?

Transmissivity describes the ability of the aquifer to transmit groundwater throughout its entire saturated thickness. Transmissivity is measured as the rate at which groundwater can flow through an aquifer section of unit width under a unit hydraulic gradient

How to Calculate Transmissivity derived from time drawdown graphs?

Transmissivity derived from time drawdown graphs calculator uses Transmissivity = (2.3*Pumping Rate)/(4*pi*Drawdown Across One Log Cycle) to calculate the Transmissivity, Transmissivity derived from time drawdown graphs is the rate at which water passes through a unit width of the aquifer under a unit hydraulic gradient. Transmissivity is denoted by τ symbol.

How to calculate Transmissivity derived from time drawdown graphs using this online calculator? To use this online calculator for Transmissivity derived from time drawdown graphs, enter Pumping Rate (Q) & Drawdown Across One Log Cycle (Δs) and hit the calculate button. Here is how the Transmissivity derived from time drawdown graphs calculation can be explained with given input values -> 0.028759 = (2.3*7)/(4*pi*44.55).

FAQ

What is Transmissivity derived from time drawdown graphs?
Transmissivity derived from time drawdown graphs is the rate at which water passes through a unit width of the aquifer under a unit hydraulic gradient and is represented as τ = (2.3*Q)/(4*pi*Δs) or Transmissivity = (2.3*Pumping Rate)/(4*pi*Drawdown Across One Log Cycle). Pumping Rate is the actual volumetric pumping rate & Drawdown Across One Log Cycle from Time-drawdown graphs.
How to calculate Transmissivity derived from time drawdown graphs?
Transmissivity derived from time drawdown graphs is the rate at which water passes through a unit width of the aquifer under a unit hydraulic gradient is calculated using Transmissivity = (2.3*Pumping Rate)/(4*pi*Drawdown Across One Log Cycle). To calculate Transmissivity derived from time drawdown graphs, you need Pumping Rate (Q) & Drawdown Across One Log Cycle (Δs). With our tool, you need to enter the respective value for Pumping Rate & Drawdown Across One Log Cycle and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.
How many ways are there to calculate Transmissivity?
In this formula, Transmissivity uses Pumping Rate & Drawdown Across One Log Cycle. We can use 1 other way(s) to calculate the same, which is/are as follows -
  • Transmissivity = 35*Pumping Rate/Drawdown Across One Log Cycle
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