Drawdown in aquifer caused by pumping at any point in aquifer Calculator

✖Pumping Rate is the actual volumetric pumping rate.ⓘ Pumping Rate [Q]			+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%
✖Transmissivity describes the ability of the to transmit groundwater throughout its entire saturated thickness.ⓘ Transmissivity [τ]			+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%
✖Distance from Pumping Well to the point where drawdown occurs.ⓘ Distance from Pumping Well [r]			+10% -10%

✖Possible Drawdown in Confined Aquifer is the drawdown that would have occurred if the aquifer had been confined (that is, if no dewatering had occurred).ⓘ Drawdown in aquifer caused by pumping at any point in aquifer [s']

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Drawdown in aquifer caused by pumping at any point in aquifer

Formula

`"s'" = "Q"*"t"/("τ"*"S"*"r"^2)`

Example

`"0.196078m"="7m³/s"*"30s"/("1.4m²/s"*"85"*("3m")^2)`

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Drawdown in aquifer caused by pumping at any point in aquifer Solution

STEP 0: Pre-Calculation Summary

Formula Used

Possible Drawdown in Confined Aquifer = Pumping Rate*Time Period/(Transmissivity*Storage Coefficient*Distance from Pumping Well^2)
s' = Q*t/(τ*S*r^2)
This formula uses 6 Variables

Variables Used

Possible Drawdown in Confined Aquifer - (Measured in Meter) - Possible Drawdown in Confined Aquifer is the drawdown that would have occurred if the aquifer had been confined (that is, if no dewatering had occurred).
Pumping Rate - (Measured in Cubic Meter per Second) - Pumping Rate is the actual volumetric pumping rate.
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.
Transmissivity - (Measured in Square Meter per Second) - Transmissivity describes the ability of the to transmit groundwater throughout its entire saturated thickness.
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 - (Measured in Meter) - Distance from Pumping Well to the point where drawdown occurs.

STEP 1: Convert Input(s) to Base Unit

Pumping Rate: 7 Cubic Meter per Second --> 7 Cubic Meter per Second No Conversion Required
Time Period: 30 Second --> 30 Second No Conversion Required
Transmissivity: 1.4 Square Meter per Second --> 1.4 Square Meter per Second No Conversion Required
Storage Coefficient: 85 --> No Conversion Required
Distance from Pumping Well: 3 Meter --> 3 Meter No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

s' = Q*t/(τ*S*r^2) --> 7*30/(1.4*85*3^2)

Evaluating ... ...

s' = 0.196078431372549

STEP 3: Convert Result to Output's Unit

0.196078431372549 Meter --> No Conversion Required

FINAL ANSWER

0.196078431372549 ≈ 0.196078 Meter <-- Possible Drawdown in Confined Aquifer

(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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Drawdown in aquifer caused by pumping at any point in aquifer

Go Possible Drawdown in Confined Aquifer = Pumping Rate*Time Period/(Transmissivity*Storage Coefficient*Distance from Pumping Well^2)

Total Drawdown in Pumping Well expressed given Factors related to Hydraulic Characteristics

Go Total Drawdown = Factors related to Hydraulic Characteristics*Pumping Rate+(Factors related to Characteristics of the Well*Pumping Rate^2)

Drawdown in aquifer for total drawdown

Go Change in Drawdown = Total Drawdown-Well loss

Total Drawdown in Pumping Well

Go Total Drawdown = Change in Drawdown+Well loss

Well Loss for Total Drawdown

Go Well loss = Total Drawdown-Change in Drawdown

Drawdown in aquifer caused by pumping at any point in aquifer Formula

Possible Drawdown in Confined Aquifer = Pumping Rate*Time Period/(Transmissivity*Storage Coefficient*Distance from Pumping Well^2)
s' = Q*t/(τ*S*r^2)

What is Drawdown ?

Drawdown is a term applied to the maximum lowering of the groundwater table caused by pumping or artesian flow. It is measured as the difference between the initial level of water in a well before pumping, and the static, or stabilized, level of water after a long period of pumping

What is an aquifer?

An aquifer is an underground layer of water-bearing permeable rock, rock fractures or unconsolidated materials. Groundwater from aquifers can be extracted using a water well. The study of water flow in aquifers and the characterization of aquifers is called hydrogeology.

How to Calculate Drawdown in aquifer caused by pumping at any point in aquifer?

Drawdown in aquifer caused by pumping at any point in aquifer calculator uses Possible Drawdown in Confined Aquifer = Pumping Rate*Time Period/(Transmissivity*Storage Coefficient*Distance from Pumping Well^2) to calculate the Possible Drawdown in Confined Aquifer, The Drawdown in aquifer caused by pumping at any point in aquifer is a change in groundwater level due to an applied stress. Possible Drawdown in Confined Aquifer is denoted by s' symbol.

How to calculate Drawdown in aquifer caused by pumping at any point in aquifer using this online calculator? To use this online calculator for Drawdown in aquifer caused by pumping at any point in aquifer, enter Pumping Rate (Q), Time Period (t), Transmissivity (τ), Storage Coefficient (S) & Distance from Pumping Well (r) and hit the calculate button. Here is how the Drawdown in aquifer caused by pumping at any point in aquifer calculation can be explained with given input values -> 0.196078 = 7*30/(1.4*85*3^2).

FAQ

What is Drawdown in aquifer caused by pumping at any point in aquifer?

The Drawdown in aquifer caused by pumping at any point in aquifer is a change in groundwater level due to an applied stress and is represented as s' = Q*t/(τ*S*r^2) or Possible Drawdown in Confined Aquifer = Pumping Rate*Time Period/(Transmissivity*Storage Coefficient*Distance from Pumping Well^2). Pumping Rate is the actual volumetric pumping rate, 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, Transmissivity describes the ability of the to transmit groundwater throughout its entire saturated thickness, 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 the point where drawdown occurs.

How to calculate Drawdown in aquifer caused by pumping at any point in aquifer?

The Drawdown in aquifer caused by pumping at any point in aquifer is a change in groundwater level due to an applied stress is calculated using Possible Drawdown in Confined Aquifer = Pumping Rate*Time Period/(Transmissivity*Storage Coefficient*Distance from Pumping Well^2). To calculate Drawdown in aquifer caused by pumping at any point in aquifer, you need Pumping Rate (Q), Time Period (t), Transmissivity (τ), Storage Coefficient (S) & Distance from Pumping Well (r). With our tool, you need to enter the respective value for Pumping Rate, Time Period, Transmissivity, Storage Coefficient & Distance from Pumping Well 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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