Assumptions of Dupits Theory and Darcy's Law

Q. Dupit's assumptions are valid for

1. Artesian aquifer
2. Confined aquifer
3. Leaky aquifer
4. Unconfined aquifer

Q. In a field test, a time of 6 hr was required for a tracer to travel between two observation wells 42 m apart. If the difference in water table elevations in these wells are 0.85 m and porosity of the aquifer is 20%, then coefficient of permeability of the aquifer is ___________ mm/sec.

1. 19.26

Q. Ground water flows through an aquifer with a cross-sectional area of $1.0\times {10}^{4}m$and a length of 1500 m. Hydraulic heads are 300 m and 250 m at the ground water entry and exit points in the aquifer respectively. Ground water discharge into stream at the rate of $1500m^3/day.$ The corresponding hydraulic conductivity of this aquifer will be

1. 3.5 m/day
2. 4.5 m/day
3. 5.0 m/day
4. 5.5 m/day