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Hydrology & Irrigation

Yield of a Confined Aquifer

The surface j...

Question

The surface joining the static levels in several non-pumping wells penetrating a continuous confined aquifer represents

A

Water table surface

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B

Capillary fringe

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C

Piezometric surface of the aquifer

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D

Physical top surface of the aquifer

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Solution

The correct option is C Piezometric surface of the aquifer
Piezometric surface of the aquifer .

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Similar questions

Q. A fully penetrating confined aquifer is pumped at a constant rate of

Q m^{3} / s e c

. The drawdowns at an observation well at a distance r from pumping well are in the ratio of 3 : 4 after one and two hours of pumping respectively. The storage coefficient is s, the transmissibility of the aquifer (in

m^{2} / s e c

Q. For steady flow to a fully penetrating well in a confined aquifer, the drawdowns at radial distances of

r_{1}

r_{2}

from the well have been measured as

s_{1}

s_{2}

respectively, for a pumping rate of

Q

. The transmissivity of the aquifer is equal to

Q. A well of diameter

20 cm

fully penetrates a confined aquifer. After a long period of pumping at a rate of

2720 L/min

, the observations of drawdown taken at

10 m

100 m

distances from the centre of the well are found to be

3 m

0.5 m

respectively. The transmissivity of the aquifer is ________.

Q. A well diameter 30 cm fully penetrated a confined aquifer of 25 m thick. After a long period of pumping at a steady state, the observations drawdown taken at 25 m and 75 meters distances from the centre of the main well are found to be 5 m and 1.5 m respectively. If the coefficient of permeability of the aquifer is 12 m/day, the steady state discharge from the main well would be ____ liter/min.

Q. A 45 cm diameter well penetrates an unconfined aquifer of 30 m thick. Under the steady pumping rate for a long time, the drawdown at two observation wells 10 m and 20 m from the pumping well are 5 m and 3.5 m respectively. What will be the discharge (cubic metre per sec), if the permeability of the aquifer is given as 20 m/day.

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