$ 2,500 negotiable
drilling well points and boreholes, installations sitting and surveying

Posted On: 07-05-2018 Listing Id: 1496059

HAVOTHJAIR BOREHOLE DRILLING we initially specialising in the installation and maintenance of borehole pumps. Once established, it soon became obvious that the company could offer a much broader range of services using the same skills base, and before long the company offered all the necessary services that are required for the delivery of independent water supply, providing constant flow, pressure and quality water at the flick of a switch. This includes the design and construction of boreholes for domestic and commercial properties, factories, hotels, golf courses, hospitals and water supply companies. We provide a one-stop service from water surveys, construction of boreholes, yield testing and installation of submersible pumps, as well as storage tank supply and installation.
STEP DRAWDOWN
This test is the first test that is done during test pumping in order to check the hydraulic efficiency of the borehole and to determine the discharge rate needed for the constant discharge test
CONSTANT DISCHARGE
This test is used to determine how much water the aquifer can yield on a long-term basis. The analysis provides useful input to assess the sustainable yield of individual boreholes and the potential of aquifers
RECOVERY TEST
Upon completion of the constant discharge test, when the pump is switched off, the water level recovery is measured. This recovery test is very useful in qualitatively measuring the pumping performance and possible de-watering of aquifers
EXTENDED STEP DRAWDOWN
This test is designed of application in specific cases only, namely where the expense of a constant discharge test is not warranted but more information about the aquifer is needed than the step-drawdown test alone can give. BOREHOLE TESTING
Borehole testing is the process whereby a borehole is subjected to pumping under controlled test conditions in order to determine the performance characteristics of a borehole. Ultimately borehole testing aims to determine the optimum rate at which a borehole should be pumped.

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