What is a geological borehole?
Boreholes range from one to several thousand metres deep. Borehole records are produced from a geologist’s or surveyor’s observations of the rock core extracted from the ground and typically include locality and lithological descriptions with depth and thickness.
How much does a borehole cost?
A borehole installation can cost anything from R60 000 to R100 000, but can cost more depending on how deep you need to drill, the amount of casing used, type of rock that needs to be drilled, ground conditions, equipment and other purpose-for-use related costs.
Who prepared the groundwater atlas for Africa?
the BGS
The Africa Groundwater Atlas was developed by the BGS in collaboration with the International Association of Hydrogeologists (IAH) Burdon Groundwater Network for Developing Countries and with more than 50 groundwater scientists across Africa, who co-authored country profiles.
How long does a borehole last?
A borehole is an asset that should last 50-80 years, with very low maintenance costs in the first 10-15 years. But for this to happen, you need to make the right decisions at the start of the process and invest wisely for long-term returns.
How many types of borehole do we have?
– There are in fact three major categories of well : dug wells, driven wells and drilled wells, commonly known as boreholes.
Is borehole water drinkable?
Can I Drink The Water? In short, yes, borehole water is usually safe to drink. However, The Private Water Supplies Regulations has said that you must have your private water supply checked to ensure it is consistent with drinking water standards.
How much electricity does a borehole pump use South Africa?
Cost/Benefit Analysis Between 2013 and May 2016, the cost of electricity to run the pump was R1975 (Table 1). Therefore, the total cost (operating and capital) to irrigate the garden using borehole water during this period was R38 222. Table 1 shows that between 2013 and May 2016, GCS used a total of 4112 kilolitres.
Is there water under Africa?
Groundwater reserves in Africa are estimated to be 20 times larger than the water stored in lakes and reservoirs above ground. They are a vital source of drinking water in sub-Saharan Africa, where groundwater is often the only year-round supply of fresh water in rural areas.
Why are boreholes so expensive?
The cost of boreholes seems excessive We design the borehole depths to meet the requirements of the Microgeneration Certification Scheme (MCS). Both our air source and ground source heat pumps meet the requirements of that scheme.
Can you drink borehole water?
In short, yes, borehole water is usually safe to drink. However, The Private Water Supplies Regulations has said that you must have your private water supply checked to ensure it is consistent with drinking water standards.
How big is a borehole in South Africa?
Usually between 30m and 100m in depth. You get much more water per than you do out of a wellpoint. The depth needed to be drilled does affect the cost of a borehole in South Africa. It also takes much longer to drill.
How many borehole records are there in the world?
This layer of the Map based index (GeoIndex) shows the location of records of boreholes, shafts and wells from all forms of drilling and site investigation work. Some 850,000 records dating back over 200 years and ranging from one to several thousand metres deep.
How often is the onshore borehole index updated?
Currently some 50,000 new records are being added to the collection each year. The dataset available via the GeoIndex is a snapshot, taken at a particular date, of the Single Onshore Borehole Index. Although the GeoIndex is updated at regular intervals more information may be available than is shown.
Where can I find BGS scanned borehole Records?
GeoIndex offers free, direct, online access to the National Geoscience Data Centre’s (NGDC) collection of over a million onshore scanned boreholes, shafts and well records. Scanned borehole record. BGS © UKRI.