Question

A \(20 \, \text{cm}\) diameter well is penetrating a confined aquifer. The rate of discharge is \(0.2 \, \text{m}^3/\text{sec}\), the drawdowns at \(10 \, \text{m}\) and \(30 \, \text{m}\) distance from the well are observed to be \(3.5 \, \text{m}\) and \(2 \, \text{m}\) respectively. Determine hydraulic conductivity and transmissivity of aquifer.

• A. \(0.0007 \, \text{m/sec}\) and \(0.0233 \, \text{m}^2/\text{sec}\)
• B. \(0.007 \, \text{m/sec}\) and \(0.233 \, \text{m}^2/\text{sec}\)
• C. \(0.07 \, \text{m/sec}\) and \(2.33 \, \text{m}^2/\text{sec}\)
• D. \(0.7 \, \text{m/sec}\) and \(23.3 \, \text{m}^2/\text{sec}\)

Hint:

For confined aquifer pumping tests: \[ \boxed{ T= \frac{Q \ln(r_2/r_1)} {2\pi(s_1-s_2)} } \] Also remember: \[ \boxed{ T = Kb } \] where:
• \(T\) = transmissivity
• \(K\) = hydraulic conductivity
• \(b\) = aquifer thickness

Answer 1

The Correct Option is A