The test pumping will be done according to a written schedule, which will be prepared by the supervision.

A 36-hour pumping can be done with the following distribution of time. To make a 4-hour pre-pumping, with which the final development and cleaning of the drilling will be done and at the same time the capacity of the aquifers will be evaluated.

Pumping will follow in 4 steps of 2 hours each. The benefits of the steps will result from the pre-pumping.

For example, if it is estimated in the pre-pump that the maximum drilling flow is 20-25 m3 / h the steps can be: with 10 m3 / h pumping for 2 hours, continuous increase of flow to 15 m3 / h for also 2 hours, increase of flow at 20 m3 / h for 2 hours and finally another two hours with a flow of 25 m3 / h.

The level measurements will be recorded on special pumping sheets and recorded on semi-graph paper and the steps on plain millimeter paper on site to assess the progress of the pumping and the definition of the next step.

Finally, after processing the measurements with a special pumping program, the pumping diagrams and the hydraulic characteristics of the aquifers will be formed.


Pumping in steps, with continuous recording in an analog diagram


Characteristic drilling curve

At the end of the pumping stage in the upper stage, the pumping will be stopped for several hours, in order to return the pumping level to the resting level. During this period, level recovery measurements will be made.

The processing of the measurements will result in the critical drilling supply, the maximum proposed supply and in cooperation with the supervisor the operating supply will be estimated.

After pre-pumping, step pumping and level reset, a constant flow will be pumped. The pumping of a fixed supply will be done with the supply that we have estimated to be the operating supply. This pumping will take 24 hours without stopping.

The measurements will be recorded on semilogram paper and processed.


Straight level drop - logarithm time

Their measurements, recordings and processing will be done as mentioned above and the results will be delivered to you in a technical booklet.

The flow measurements are made with a flowmeter or with a titration meter or a Pitot pipe, and the water level is measured with an electric precision level meter, inside the piezometric tube.

The pumping unit will be a submersible pump or pump. The flow is regulated by strangling the exhaust valve or changing the engine speed.

In parallel with the level measurements, continuous conductivity measurements will be made.