In the derivation of Thiem's formula , the following assumption is not applicable

In the derivation of Thiem's formula 176-8.124-1 the following assumption is not applicable

[A].	The aquifer is homogeneous and isotropic
[B].	Flow lines are radial and horizontal
[C].	The slope of the water surface is too small
[D].	The well has been sunk up to the surface of the unconfined aquifer
[E].	None of these.

Answer: Option D

Explanation:

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