Thickness of Aquifer from Impermeable Layer given Modified Drawdown in Well 1 Solution

STEP 0: Pre-Calculation Summary
Formula Used
Unconfined Aquifer Thickness = ((Drawdown in well 1)^2/(2*(Drawdown in well 1-Modified Drawdown 1)))
Hui = ((s1)^2/(2*(s1-s1')))
This formula uses 3 Variables
Variables Used
Unconfined Aquifer Thickness - (Measured in Meter) - Unconfined Aquifer Thickness is the aquifer thickness at initial stage before pumping.
Drawdown in well 1 - (Measured in Meter) - Drawdown in well 1 is a peak-to-trough decline during a specific period for well 1.
Modified Drawdown 1 - (Measured in Meter) - Modified Drawdown 1 is the modified value of drawdown for well 1.
STEP 1: Convert Input(s) to Base Unit
Drawdown in well 1: 2.15 Meter --> 2.15 Meter No Conversion Required
Modified Drawdown 1: 1.721 Meter --> 1.721 Meter No Conversion Required
STEP 2: Evaluate Formula
Substituting Input Values in Formula
Hui = ((s1)^2/(2*(s1-s1'))) --> ((2.15)^2/(2*(2.15-1.721)))
Evaluating ... ...
Hui = 5.38752913752914
STEP 3: Convert Result to Output's Unit
5.38752913752914 Meter --> No Conversion Required
FINAL ANSWER
5.38752913752914 5.387529 Meter <-- Unconfined Aquifer Thickness
(Calculation completed in 00.004 seconds)

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Birsa Institute of Technology (BIT), Sindri
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8 Modified Discharge And Drawdown in Unconfined Aquifers Calculators

Unconfined Aquifer Discharge given Aquifer Constant
Go Discharge = Aquifer Constant/((log((Radial Distance at Observation Well 2/Radial Distance at Observation Well 1),e))/(2.72*(Modified Drawdown 1-Modified Drawdown 2)))
Modified Drawdown in Well 1 given Aquifer Constant
Go Modified Drawdown 1 = Modified Drawdown 2+((Discharge*log((Radial Distance at Observation Well 2/Radial Distance at Observation Well 1),e))/(2.72* Aquifer Constant))
Modified Drawdown in Well 2 given Aquifer Constant
Go Modified Drawdown 2 = Modified Drawdown 1-((Discharge*log((Radial Distance at Observation Well 2/Radial Distance at Observation Well 1),e))/(2.72* Aquifer Constant))
Thickness of Aquifer from Impermeable Layer given Modified Drawdown in Well 1
Go Unconfined Aquifer Thickness = ((Drawdown in well 1)^2/(2*(Drawdown in well 1-Modified Drawdown 1)))
Thickness of Aquifer from Impermeable Layer given Modified Drawdown in Well 2
Go Unconfined Aquifer Thickness = ((Drawdown in well 2)^2/(2*(Drawdown in well 2-Modified Drawdown 2)))
Modified Drawdown in Well 1
Go Modified Drawdown 1 = Drawdown in well 1-((Drawdown in well 1)^2/(2*Initial Aquifer Thickness))
Modified Drawdown in Well 2
Go Modified Drawdown 2 = Drawdown in well 2-((Drawdown in well 2)^2/(2*Initial Aquifer Thickness))
Discharge given Difference between Modified Drawdowns
Go Discharge = (2.72*Difference in Drawdowns*Aquifer Constant)

Thickness of Aquifer from Impermeable Layer given Modified Drawdown in Well 1 Formula

Unconfined Aquifer Thickness = ((Drawdown in well 1)^2/(2*(Drawdown in well 1-Modified Drawdown 1)))
Hui = ((s1)^2/(2*(s1-s1')))

What is Aquifer?

An aquifer is a body of rock and/or sediment that holds groundwater. Groundwater is the word used to describe precipitation that has infiltrated the soil beyond the surface and collected in empty spaces underground.

How to Calculate Thickness of Aquifer from Impermeable Layer given Modified Drawdown in Well 1?

Thickness of Aquifer from Impermeable Layer given Modified Drawdown in Well 1 calculator uses Unconfined Aquifer Thickness = ((Drawdown in well 1)^2/(2*(Drawdown in well 1-Modified Drawdown 1))) to calculate the Unconfined Aquifer Thickness, The Thickness of Aquifer from Impermeable Layer given Modified Drawdown in Well 1 is defined as the value of thickness of aquifer when we have prior information of other parameters used. Unconfined Aquifer Thickness is denoted by Hui symbol.

How to calculate Thickness of Aquifer from Impermeable Layer given Modified Drawdown in Well 1 using this online calculator? To use this online calculator for Thickness of Aquifer from Impermeable Layer given Modified Drawdown in Well 1, enter Drawdown in well 1 (s1) & Modified Drawdown 1 (s1') and hit the calculate button. Here is how the Thickness of Aquifer from Impermeable Layer given Modified Drawdown in Well 1 calculation can be explained with given input values -> 5.387529 = ((2.15)^2/(2*(2.15-1.721))).

FAQ

What is Thickness of Aquifer from Impermeable Layer given Modified Drawdown in Well 1?
The Thickness of Aquifer from Impermeable Layer given Modified Drawdown in Well 1 is defined as the value of thickness of aquifer when we have prior information of other parameters used and is represented as Hui = ((s1)^2/(2*(s1-s1'))) or Unconfined Aquifer Thickness = ((Drawdown in well 1)^2/(2*(Drawdown in well 1-Modified Drawdown 1))). Drawdown in well 1 is a peak-to-trough decline during a specific period for well 1 & Modified Drawdown 1 is the modified value of drawdown for well 1.
How to calculate Thickness of Aquifer from Impermeable Layer given Modified Drawdown in Well 1?
The Thickness of Aquifer from Impermeable Layer given Modified Drawdown in Well 1 is defined as the value of thickness of aquifer when we have prior information of other parameters used is calculated using Unconfined Aquifer Thickness = ((Drawdown in well 1)^2/(2*(Drawdown in well 1-Modified Drawdown 1))). To calculate Thickness of Aquifer from Impermeable Layer given Modified Drawdown in Well 1, you need Drawdown in well 1 (s1) & Modified Drawdown 1 (s1'). With our tool, you need to enter the respective value for Drawdown in well 1 & Modified Drawdown 1 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 Unconfined Aquifer Thickness?
In this formula, Unconfined Aquifer Thickness uses Drawdown in well 1 & Modified Drawdown 1. We can use 1 other way(s) to calculate the same, which is/are as follows -
  • Unconfined Aquifer Thickness = ((Drawdown in well 2)^2/(2*(Drawdown in well 2-Modified Drawdown 2)))
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