Before borehole drilling there is need to conduct a hydro-geological survey in the proposed site. Generally groundwater is unequally distributed surveys ascertains suitable sites for exploration of significant quantities of groundwater before carrying out any drilling exercise. This ensures the best spot is selected according to the geological data and our clients’ plan. The hydro-geological data, maps, graphs and cross-section profiles obtained from the hydro-geological survey are used in determination of important information such as estimation of drilling depth and identification of stress areas.
Drilling Authorizations
After the siting has been done, the hydro geologist will need to do a report of the findings and have it submitted to the Water Resource Management Authority who will in turn evaluate it and give written authority to construct the borehole, without which, a borehole cannot be drilled.
An environmentalist also needs to be contracted to carry out an environmental impact assessment of the project. This will facilitate the issuance of the NEMA license which is also a prerequisite in drilling.
Ground Breaking & Drilling
It is only when the rig is complete set up that the workers can begin the operations for the drilling itself. It all begins in the starter hole where a surface hole is drilled down to a specific measurement. Afterwards, the stages of drilling are continued.
Capping & Slab
The final stage of borehole drilling requires the pumping and piping of water from the successful borehole. The end use of the water will largely determine the type of pumping and reticulation system that will be installed. With too many variations on the nature and type of pump installations to go into detail here, we will discuss the most appropriate options with you in person.
Test Pumping
Test Pumping involves pumping of a well from a measured static water level at a known yield, and recording the rate and pattern by which the water level within the well changes. Once a dynamic water level is reached, rate of inflow to the well equals the rate of pumping. Towards the end of the test a water sample is collected for chemical analysis. The results of the test enables the hydro geologist to calculate the best pumping rate, the installation depth, and the drawdown for a given discharge rate. Contact us today for quality and affordable water drilling services.