Drawdown given Piezometric Head Calculator

✖Initial Constant Piezometric Head is the initial pressure head in a groundwater system at a specific point before any external influences or changes occur.ⓘ Initial Constant Piezometric Head [H]			+10% -10%
✖Drawdown is the difference in height between the natural water table (or potentiometric surface) and the water level in a well after groundwater has been extracted.ⓘ Drawdown [h]			+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 given Piezometric Head [s']

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Drawdown given Piezometric Head Solution

STEP 0: Pre-Calculation Summary

Formula Used

Possible Drawdown in Confined Aquifer = Initial Constant Piezometric Head-Drawdown
s' = H-h
This formula uses 3 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).
Initial Constant Piezometric Head - (Measured in Meter) - Initial Constant Piezometric Head is the initial pressure head in a groundwater system at a specific point before any external influences or changes occur.
Drawdown - (Measured in Meter) - Drawdown is the difference in height between the natural water table (or potentiometric surface) and the water level in a well after groundwater has been extracted.

STEP 1: Convert Input(s) to Base Unit

Initial Constant Piezometric Head: 10 Meter --> 10 Meter No Conversion Required
Drawdown: 9.8 Meter --> 9.8 Meter No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

s' = H-h --> 10-9.8

Evaluating ... ...

s' = 0.199999999999999

STEP 3: Convert Result to Output's Unit

0.199999999999999 Meter --> No Conversion Required

FINAL ANSWER

0.199999999999999 ≈ 0.2 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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NSS College of Engineering (NSSCE), Palakkad

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< Unsteady Flow in a Confined Aquifer Calculators

Drawdown

LaTeX 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'

LaTeX 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'

LaTeX 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 Storage Coefficient

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

Drawdown given Piezometric Head Formula

LaTeX Go

Possible Drawdown in Confined Aquifer = Initial Constant Piezometric Head-Drawdown
s' = H-h

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 Drawdown given Piezometric Head?

Drawdown given Piezometric Head calculator uses Possible Drawdown in Confined Aquifer = Initial Constant Piezometric Head-Drawdown to calculate the Possible Drawdown in Confined Aquifer, The Drawdown given Piezometric Head formula is defined as the change in groundwater level due to an applied stress at a point distance from the pumping well. Possible Drawdown in Confined Aquifer is denoted by s' symbol.

How to calculate Drawdown given Piezometric Head using this online calculator? To use this online calculator for Drawdown given Piezometric Head, enter Initial Constant Piezometric Head (H) & Drawdown (h) and hit the calculate button. Here is how the Drawdown given Piezometric Head calculation can be explained with given input values -> 0.2 = 10-9.8.

FAQ

What is Drawdown given Piezometric Head?

The Drawdown given Piezometric Head formula is defined as the change in groundwater level due to an applied stress at a point distance from the pumping well and is represented as s' = H-h or Possible Drawdown in Confined Aquifer = Initial Constant Piezometric Head-Drawdown. Initial Constant Piezometric Head is the initial pressure head in a groundwater system at a specific point before any external influences or changes occur & Drawdown is the difference in height between the natural water table (or potentiometric surface) and the water level in a well after groundwater has been extracted.

How to calculate Drawdown given Piezometric Head?

The Drawdown given Piezometric Head formula is defined as the change in groundwater level due to an applied stress at a point distance from the pumping well is calculated using Possible Drawdown in Confined Aquifer = Initial Constant Piezometric Head-Drawdown. To calculate Drawdown given Piezometric Head, you need Initial Constant Piezometric Head (H) & Drawdown (h). With our tool, you need to enter the respective value for Initial Constant Piezometric Head & Drawdown 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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