# Civil Engineering - Water Supply Engineering - Discussion

Discussion Forum : Water Supply Engineering - Section 4 (Q.No. 8)
8.
The discharge for the confined tube well is obtained from
Thiem's formula
Darcy's formula
Tolman's formula
Dupuits formula.
Explanation:
No answer description is available. Let's discuss.
Discussion:
11 comments Page 1 of 2.

Heer said:   5 years ago
r2 and r1 = radii of two observeration wells. In Thiem's formula.

And
In Dupuit's formula,
Rw = radius of the main pumped well.

So, the given answer is correct.

Heer said:   5 years ago
Given answer is correct one because in question it is given R and Rw.
Which is considered in Dupuit's confined aquifer equation.

In Dupuit's method, the integration limit is considered is R and Rw.
Where R = radius of influence.
Rw = radius of the main pumped well.

While in Thiem's formula for confined aquifers it is given r2 and r1,
In Thiem's formula the integration limit is considered is r2 and r1.
Where r2 and r2 = radii of two observation wells.

Satish Verma said:   6 years ago
Option A is right.

Roop Kumar said:   6 years ago
Dupits for unconfined aquifer.

Garry said:   7 years ago

Garry said:   7 years ago
This equation for confined well obtained from steady flow using darcy equation and the equation achieved is called Thieme's equation.

Roy said:   7 years ago
Yes, A is the correct answer.

Thiem's equation is the correct answer.

Pritamdas said:   7 years ago
Dupit is correct. I agree.

Vikas chauhan said:   7 years ago
You are right @Praveen.

Because Dupuits formula is for unconfined tube wells.