9. A single well pumps water from a horizontally infinite confined aquifer at a rate of 2.1m³/day. The well-bore diameter is 15 cm, and steady-state drawdown at the pumping well is 1.1m. Drawdown at a monitoring well located 97 m away is measured at 0.14 m.a) Estimate the Transmissivity (T) of the aquifer.b) Based on that estimate, what would you expect the drawdown to be 54 m from thepumping well?c)How would you estimate the Hydraulic Conductivity (K) from the information you have?What other information would you need?

Answered: 9. A single well pumps water from a…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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9. A single well pumps water from a horizontally infinite confined aquifer at a rate of 2.1
m³/day. The well-bore diameter is 15 cm, and steady-state drawdown at the pumping well is 1.1
m. Drawdown at a monitoring well located 97 m away is measured at 0.14 m.
a) Estimate the Transmissivity (T) of the aquifer.
b) Based on that estimate, what would you expect the drawdown to be 54 m from the
pumping well?
c)
How would you estimate the Hydraulic Conductivity (K) from the information you have?
What other information would you need?

Expert Solution

Step 1

Aquifers :

Aquifers are bodies of rock and/or sediment that contain groundwater. The term "groundwater" refers to rainwater that has entered the soil under the surface and accumulated in voids underground. Aquifers are classified into two types: confined and unconfined.

Given :

$\begin{array}{rcl} r a t e o f p u m p i n g (Q) & = & 2.1 m^{3} / d a y \\ w e l l b o r e d i a m e t e r (d) & = & 15 c m \\ r a d i u s (r) & = & \frac{d}{2} \\ = & \frac{15}{2} \\ = & 7.5 c m \\ d r a w d o w n a t p u m p i n g w e l l (S_{1}) & = & 1.1 m \\ d r a w d o w n a t m o n i t o r i n g w e l l (S_{2}) & = & 0.14 m \\ d i s t a c e o f t h e m o n i t o r i n g w e l l (R) & = & 97 m \end{array}$

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