Observed drawdown in unconfined aquifer Calculator

✖Observed Drawdown in the Unconfined Aquifer is the reduction in hydraulic head observed at a well in an aquifer.ⓘ Observed Drawdown in the Unconfined Aquifer [s]			+10% -10%
✖The Aquifer Thickness referred as vertical distance between the top and bottom boundaries of an aquifer, typically measured in feet or meters.ⓘ Aquifer Thickness [b]			+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).ⓘ Observed drawdown in unconfined aquifer [s']

⎘ Copy

👎

Formula

LaTeX

Reset

👍

Download Engineering Hydrology Formula PDF PDF Image

Observed drawdown in unconfined aquifer Solution

STEP 0: Pre-Calculation Summary

Formula Used

Possible Drawdown in Confined Aquifer = Observed Drawdown in the Unconfined Aquifer-((Observed Drawdown in the Unconfined Aquifer^2)/(2*Aquifer Thickness))
s' = s-((s^2)/(2*b))
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).
Observed Drawdown in the Unconfined Aquifer - (Measured in Meter) - Observed Drawdown in the Unconfined Aquifer is the reduction in hydraulic head observed at a well in an aquifer.
Aquifer Thickness - (Measured in Meter) - The Aquifer Thickness referred as vertical distance between the top and bottom boundaries of an aquifer, typically measured in feet or meters.

STEP 1: Convert Input(s) to Base Unit

Observed Drawdown in the Unconfined Aquifer: 3 Meter --> 3 Meter No Conversion Required
Aquifer Thickness: 15 Meter --> 15 Meter No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

s' = s-((s^2)/(2*b)) --> 3-((3^2)/(2*15))

Evaluating ... ...

s' = 2.7

STEP 3: Convert Result to Output's Unit

2.7 Meter --> No Conversion Required

FINAL ANSWER

2.7 Meter <-- Possible Drawdown in Confined Aquifer

(Calculation completed in 00.020 seconds)

You are here -

Home » Engineering » Civil » Engineering Hydrology » Groundwater Hydrology » Source of Water Derived from Wells » Observed drawdown in unconfined aquifer

Credits

Created by Mithila Muthamma PA

Coorg Institute of Technology (CIT), Coorg

Mithila Muthamma PA has created this Calculator and 2000+ more calculators!

Verified by Chandana P Dev

NSS College of Engineering (NSSCE), Palakkad

Chandana P Dev has verified this Calculator and 1700+ more calculators!

< Source of Water Derived from Wells Calculators

Balance equation when reduction in natural discharge equal rate of withdrawal

LaTeX Go Natural Recharge = (Natural Discharge-Reduction in Natural Discharge)+Rate of Withdrawal

Equation for recharge when recharge exceeds discharge

LaTeX Go Natural Recharge = Natural Discharge+Change in Groundwater Storage

Natural discharge when discharge exceeds recharge

LaTeX Go Natural Discharge = Natural Recharge-Change in Groundwater Storage

Natural discharge when recharge exceeds discharge

LaTeX Go Natural Discharge = Natural Recharge-Change in Groundwater Storage

Observed drawdown in unconfined aquifer Formula

LaTeX Go

Possible Drawdown in Confined Aquifer = Observed Drawdown in the Unconfined Aquifer-((Observed Drawdown in the Unconfined Aquifer^2)/(2*Aquifer Thickness))
s' = s-((s^2)/(2*b))

What is Unconfined Aquifer?

An Unconfined Aquifer is an aquifer whose upper water surface (water table) is at atmospheric pressure, and thus is able to rise and fall.

How to Calculate Observed drawdown in unconfined aquifer?

Observed drawdown in unconfined aquifer calculator uses Possible Drawdown in Confined Aquifer = Observed Drawdown in the Unconfined Aquifer-((Observed Drawdown in the Unconfined Aquifer^2)/(2*Aquifer Thickness)) to calculate the Possible Drawdown in Confined Aquifer, Observed drawdown in unconfined aquifer can be used for when the effect of dewatering of the aquifer can be eliminated. Possible Drawdown in Confined Aquifer is denoted by s' symbol.

How to calculate Observed drawdown in unconfined aquifer using this online calculator? To use this online calculator for Observed drawdown in unconfined aquifer, enter Observed Drawdown in the Unconfined Aquifer (s) & Aquifer Thickness (b) and hit the calculate button. Here is how the Observed drawdown in unconfined aquifer calculation can be explained with given input values -> 2.7 = 3-((3^2)/(2*15)).

FAQ

What is Observed drawdown in unconfined aquifer?

Observed drawdown in unconfined aquifer can be used for when the effect of dewatering of the aquifer can be eliminated and is represented as s' = s-((s^2)/(2*b)) or Possible Drawdown in Confined Aquifer = Observed Drawdown in the Unconfined Aquifer-((Observed Drawdown in the Unconfined Aquifer^2)/(2*Aquifer Thickness)). Observed Drawdown in the Unconfined Aquifer is the reduction in hydraulic head observed at a well in an aquifer & The Aquifer Thickness referred as vertical distance between the top and bottom boundaries of an aquifer, typically measured in feet or meters.

How to calculate Observed drawdown in unconfined aquifer?

Observed drawdown in unconfined aquifer can be used for when the effect of dewatering of the aquifer can be eliminated is calculated using Possible Drawdown in Confined Aquifer = Observed Drawdown in the Unconfined Aquifer-((Observed Drawdown in the Unconfined Aquifer^2)/(2*Aquifer Thickness)). To calculate Observed drawdown in unconfined aquifer, you need Observed Drawdown in the Unconfined Aquifer (s) & Aquifer Thickness (b). With our tool, you need to enter the respective value for Observed Drawdown in the Unconfined Aquifer & Aquifer Thickness and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

Home

FREE PDFs

🔍 Search