Time at which drawdowns are measured for storage coefficient Calculator

✖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%
✖Distance from Pumping Well to Point Intersection where the straight line intersects the Zero-drawdown line.ⓘ Distance from Pumping Well to Point Intersection [r_o]			+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%

✖Total Drawdown is the reduction in hydraulic head observed at a well in an aquifer, typically due to pumping a well as part of an aquifer test or well test.ⓘ Time at which drawdowns are measured for storage coefficient [s_t]

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Time at which drawdowns are measured for storage coefficient

Formula

`"s"_{"t"} = "S"*"r"_{"o"}^2/(2.25*"T")`

Example

`"0.035232m"="0.0545"*("4.0m")^2/(2.25*"11m²/s")`

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Time at which drawdowns are measured for storage coefficient Solution

STEP 0: Pre-Calculation Summary

Formula Used

Total Drawdown = Storage Coefficient*Distance from Pumping Well to Point Intersection^2/(2.25*Transmissivity)
s_t = S*r_o^2/(2.25*T)
This formula uses 4 Variables

Variables Used

Total Drawdown - (Measured in Meter) - Total Drawdown is the reduction in hydraulic head observed at a well in an aquifer, typically due to pumping a well as part of an aquifer test or well test.
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.
Distance from Pumping Well to Point Intersection - (Measured in Meter) - Distance from Pumping Well to Point Intersection where the straight line intersects the Zero-drawdown line.
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.

STEP 1: Convert Input(s) to Base Unit

Storage Coefficient: 0.0545 --> No Conversion Required
Distance from Pumping Well to Point Intersection: 4 Meter --> 4 Meter No Conversion Required
Transmissivity: 11 Square Meter per Second --> 11 Square Meter per Second No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

s_t = S*r_o^2/(2.25*T) --> 0.0545*4^2/(2.25*11)

Evaluating ... ...

s_t = 0.0352323232323232

STEP 3: Convert Result to Output's Unit

0.0352323232323232 Meter --> No Conversion Required

FINAL ANSWER

0.0352323232323232 ≈ 0.035232 Meter <-- Total Drawdown

(Calculation completed in 00.004 seconds)

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Created by Mithila Muthamma PA

Coorg Institute of Technology (CIT), Coorg

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< 10+ Distance-Drawdown Analysis Calculators

Transmissivity given storage coefficient from distance drawdown

Go Transmissivity = (Storage Coefficient*Distance from Pumping Well to Point Intersection^2)/(2.25*Total Drawdown)

Time at which drawdowns are measured for storage coefficient

Go Total Drawdown = Storage Coefficient*Distance from Pumping Well to Point Intersection^2/(2.25*Transmissivity)

Storage coefficient from distance drawdown graphs

Go Storage Coefficient = 2.25*Transmissivity*Total Drawdown/Distance from Pumping Well to Point Intersection^2

Storage coefficient for inconsistent units from distance drawdown graphs

Go Storage Coefficient = Transmissivity*Total Drawdown/640*Distance from Pumping Well to Point Intersection^2

Drawdown across one log cycle from distance drawdown graphs given transmissivity

Go Drawdown Across Log Cycle = 2.3*Pumping Rate/(Transmissivity*2*pi)

Transmissivity from distance drawdown graphs

Go Transmissivity = 2.3*Pumping Rate/(2*pi*Drawdown Across Log Cycle)

Pumping rate from distance drawdown graphs

Go Pumping Rate = Transmissivity*2*pi*Drawdown Across Log Cycle/2.3

Pumping Rate given Transmissivity for Inconsistent Units from Distance-Drawdown Graphs

Go Pumping Rate = Transmissivity*Drawdown Across One Log Cycle/70

Drawdown across One Log Cycle given Transmissivity for Inconsistent Units

Go Drawdown Across One Log Cycle = 70*Pumping Rate/Transmissivity

Transmissivity for inconsistent units from distance drawdown graphs

Go Transmissivity = 70*Pumping Rate/Drawdown Across One Log Cycle

Time at which drawdowns are measured for storage coefficient Formula

Total Drawdown = Storage Coefficient*Distance from Pumping Well to Point Intersection^2/(2.25*Transmissivity)
s_t = S*r_o^2/(2.25*T)

What is water well drawdown?

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 Time at which drawdowns are measured for storage coefficient?

Time at which drawdowns are measured for storage coefficient calculator uses Total Drawdown = Storage Coefficient*Distance from Pumping Well to Point Intersection^2/(2.25*Transmissivity) to calculate the Total Drawdown, The Time at which drawdowns are measured for storage coefficient is the time at which the reduction in hydraulic head observed at a well in an aquifer, typically due to pumping a well as part of an aquifer test or well test. Total Drawdown is denoted by s_t symbol.

How to calculate Time at which drawdowns are measured for storage coefficient using this online calculator? To use this online calculator for Time at which drawdowns are measured for storage coefficient, enter Storage Coefficient (S), Distance from Pumping Well to Point Intersection (r_o) & Transmissivity (T) and hit the calculate button. Here is how the Time at which drawdowns are measured for storage coefficient calculation can be explained with given input values -> 0.035232 = 0.0545*4^2/(2.25*11).

FAQ

What is Time at which drawdowns are measured for storage coefficient?

The Time at which drawdowns are measured for storage coefficient is the time at which the reduction in hydraulic head observed at a well in an aquifer, typically due to pumping a well as part of an aquifer test or well test and is represented as s_t = S*r_o^2/(2.25*T) or Total Drawdown = Storage Coefficient*Distance from Pumping Well to Point Intersection^2/(2.25*Transmissivity). 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, Distance from Pumping Well to Point Intersection where the straight line intersects the Zero-drawdown line & 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.

How to calculate Time at which drawdowns are measured for storage coefficient?

The Time at which drawdowns are measured for storage coefficient is the time at which the reduction in hydraulic head observed at a well in an aquifer, typically due to pumping a well as part of an aquifer test or well test is calculated using Total Drawdown = Storage Coefficient*Distance from Pumping Well to Point Intersection^2/(2.25*Transmissivity). To calculate Time at which drawdowns are measured for storage coefficient, you need Storage Coefficient (S), Distance from Pumping Well to Point Intersection (r_o) & Transmissivity (T). With our tool, you need to enter the respective value for Storage Coefficient, Distance from Pumping Well to Point Intersection & Transmissivity 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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