Objective:

The objectives of determining the specific yield of an open well to estimate water availability, optimize well design, facilitate groundwater management

Apparatus used:

Sounding Tube, surveyor tape, pump, FRP tank, stopwatch etc.

 Description

A pumping test is a practical method of estimating well performance, well capacity, the zone of influence of the well and aquifer characteristics (e.g., the aquifer’s ability to store and transmit water, anisotropy, aquifer extent, presence of boundary).

STEP  1 

  Selection of open well for the conduction of pumping test.

STEP  2 

  Measure the dimensions of the FRP tank.

1m

2m

1m

STEP  3 

 Measure the water levels of 7.5m diameter well by using surveyor tape.

Initial level of water = 7.115 m

STEP  4 

 Switch on the pump and conduct the pump test. Measure the discharge from the pumping well using a 2000 litre FRP tank / container of a known volume. Use hour clock to note down the time taken to fill up the barrier.

Volume of water in FRP tank = 1.325 m³

Volume of water in FRP tank = 0.884 m³

Manometer reading = 1.325 m

Manometer reading = 0.884 m

Note:-After the pumping test, take measurements of water level at required interval. Note all these readings.

Time(min)	Water Level(m)
	During Pumping	After pumping test
2	7.145	7.335
5	7.175	7.315
10	7.205	7.285
15	7.235	7.265
20	7.265	7.245
30	7.295	7.245
40	7.325	7.245
50	7.345	7.245
60	7.345	7.245
75	7.325	7.245
90	7.345	7.235
105	7.345	7.235
120	7.345	7.235

Calculation:

Variables Used in Calculations

Initial water level = 7.115 m

CHECK RESULT Please Enter Value to proceed