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Borehole Surveying Specialists

The Why and the How of Borehole Water Surveying

Archaeologists have determined that man has been digging deep holes in the earth for more than two millennia, and that the practice may have originated in China during the Han dynasty, which lasted from around 202 BC to 220 AD. Reaching depths of up to 600 metres, the practice of boring these holes was applied both in mining activities, and as a means with which to create fresh water wells, or seawater wells from which to extract salt. They utilised a method known as percussive drilling.

Early drilling for fresh water wells was probably somewhat haphazard, requiring multiple holes to obtain a result. References to borehole surveying first appear during the 16th century, while the dubious practice of water divining or dowsing appears to have begun a about a century earlier, and continues today despite evidence that the apparent success of dowsers falls within the accepted limits of probability.

In a semi-arid country, such as South Africa, fresh water supplies are crucial, and for those who may be located beyond the reach of a municipal supply, groundwater offers them the only option. However, even municipalities have found it increasingly difficult to maintain the reserves necessary to guarantee adequate delivery to the nation’s consumers. This has resulted in substantial increases to monthly water bills, and has sparked both a drive to conserve water, and a desire by consumers to economise.

For many, the latter need has led them to look for ways in which to become self-sufficient, and therefore less dependent upon the purchase of expensive municipal water. Their bid for independence will normally begin by hiring a company experienced in the science of borehole surveying. The purpose of a hydrogeological survey is to determine the availability, quality, and the potential yield of an underground water source. The consumer needs assurance that any subterranean water present will be sufficiently pure for its intended use, and present in sufficient quantity to justify the cost of drilling, which is why the nominal charge that normally applies is well justified.

The task calls for observational skills, as well as technical. Clues are to be found in the landscape and the presence of certain water-loving plants, as well as in the local geology, which can normally be referenced from specialised geological maps that indicate the nature and location of surface and underground rock. From such data, a skilled surveyor can determine the best spot in which to drill, as well as the probable depth of drilling required. Based upon these findings, it is then possible to conduct a cost-estimate, and to provide the prospective client with an accurate quote for the work needed.

Once in possession of a suitably positive borehole surveying report, it is important to ensure that the subsequent drilling operation is carried out with the same degree of professionalism. For instance, the drilling company must take all necessary precautions to ensure the underground source does not become polluted, and that all pipes, pumps and accessories are of the best possible quality.

Noted for our expertise, reliability and quality products, Water Pump Group is a preferred choice among Gauteng residents seeking to cut down on their water bills.



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