What determines borehole depth?

Drilling a borehole for household use will usually range from about 100 feet to 500 feet deep, but when drilling a new borehole for your home or business, the depth of the well depends on the geology and underground water levels of the area.

How do I register a borehole in Botswana?

Instructions[edit]

1. Visit any DWA offices countrywide and you will get assisted over the counter.
2. Application form GS 184 to be filled by the driller and accompanied with the soil/rock sample of the site and any other document as specified by the register.
3. Register information from GS 184 form into the register book.

Do you need planning permission for a bore hole?

Landowners have a right to access any water beneath their ground. This means there is no need to acquire planning permission to drill a water borehole, thus making it easy for a developer to install a borehole during a property build process.

Can anyone have a bore hole?

Anyone can have a borehole in their garden, but if you want to take more than 20 cubic metres (4,000 gallons) of water per day from an underground source you have to apply for a abstraction licence. “We are all allowed a borehole but is not practical for everyone,” says a EA spokeswoman.

What is the maximum depth of a borehole?

Water table lies at a depth generally less than 20 m, and the maximum depth of boreholes rarely exceeds 60 m.

What is a good borehole yield?

Mean value of these borehole parameters show the average value for static water level for the fractured bedrock and regolith aquifers to be 7.24 and 6.6 m respectively, borehole yield is on average 0.7 l/s for the fractured aquifer while a mean value of 1.05 l/s was recorded for the regolith aquifers.

How many boreholes are there in Botswana?

25,000
There are more than 25,000 officially registered boreholes in Botswana of which 10,000 are owned by the government for water supply.

Can you put a borehole anywhere?

Where can I put a borehole? As long as there is sufficient space on your site or property to construct the borehole you can just about put a borehole anywhere.

How close can borehole to building?

Spacing between multiple boreholes For projects using multiple boreholes, such as Shared Ground Loop Array schemes or large heat demand commercial projects, the boreholes should be spaced at 5 to 6m between centres to avoid any interference between each ground collector.

How do you decide the number of boreholes to be made in the soil investigation?

How to determine Number and Depths of Boreholes for Geostructures?

1. Borehole numbers should be enough to find out soil-layer variations at the construction site.
2. If the location of loads is within the boundary of the structure, then at least one borehole should be drilled at the position of the heaviest load.

What is the minimum distance between boreholes?

With consideration of key factors for borehole spacing, the distance between deep boreholes can be set to 150 m. This distance comes from the average deviation of 0.5 degree and the minimum spacing of the boreholes at the depth of 5 km.

How do you find the borehole location?

How do you know where to dig a borehole?

A hydrogeologist can carry out a survey of your property in order to pinpoint the spot which offers the best chance of intersecting strong water flows. To do this, they would make use of published data (e.g. groundwater maps) and in some cases, geophysical instruments.

How much does bore hole cost?

The average drilling cost is around R 600 a metre, according to the Borehole Water Association of Southern Africa (BWA). Once drilling is done and groundwater has been found, there’s another outlay for installing a pump – about R25 000 to R30 000 – and then about R 12 000 for the laboratory water tests.

What is the cost of a borehole?

A borehole cost, if everything goes according to plan, can be anything from R 30 000 to R 100 000, including labour, pipes, cables, rope and a base plate.