Knowledge Hub

The importance of borehole construction and well efficiency

Conferences » Knowledge Hub

My research on borehole drilling, good borehole construction and well efficiency By Corné Engelbrecht After attending the 2020 workshop “Groundwater: Setting the standards – Borehole Drilling; Pumping Tests and Monitoring”, hosted by The International Association of Hydrogeologists (IAH) South Africa held November 2020 – I started my own research on borehole well efficiency and clogging. […]

Posted on 15 May 2022

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ISMAR11

A recap of the International Symposium on Managed Aquifer Recharge

Conferences » Knowledge Hub

By Kes Murray Attending the 11th International Symposium on Managed Aquifer Recharge (ISMAR 11) in California, USA, 2022: A Hydro geologists perspective  In April 2022, I had the pleasure of making the trip over to the United States of America to attend and present at ISMAR 11 in Long Beach, California. The International Symposium on […]

Posted on 15 May 2022

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Merweville - a town in the Karoo

Merweville: a drought-stricken Karoo Town – that turned its water supply battles around

Knowledge Hub » Technical Papers

Written by: Julian Conrad A question many people ask is where do small towns get their water supply from? Today we will answer that question through the case study of one of our latest projects, a town that battled drought for many years. Merweville is a special and charming little town (see Figure 1) located […]

Posted on 3 Mar 2022

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Plume of contaminated water caused by PG&E

Contaminated groundwater: Real-life horror stories

Knowledge Hub

Written by Christel van Staden Previously I have written about groundwater impact assessments contaminated land and discussed how humans have created contamination that occurs in the past, present and future. Read the article here: https://geoss.co.za/contaminated-land-the-unsettling-legacy-of-human-activity-and-industrialisation/ Movies that depict famous groundwater contamination cases In this article, we will delve a bit deeper into water contamination that […]

Posted on 22 Feb 2022

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Groundwater – general guidelines towards monitoring and management (funded by Potatoes South Africa)

Technical Documents

The intention is to provide a broad overview of groundwater resources in terms of how it occurs (its distribution across South Africa)
as well as an overview of the complete “life cycle” of groundwater development projects (starting with drilling and on through yield testing; monitoring and all the way to the authorization of the use of groundwater).

Posted on 16 Feb 2022

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drip-irrigation

Borehole water: How to get a South African Water Use License (WULA)

Knowledge Hub » Technical Papers

Usually, the preparations made for groundwater exploration, drilling, and testing the yield and quality of boreholes culminates in the registration or authorisation of the use of new groundwater. While Section 21 of the National Water Act No. 36 of 1998 guides the groundwater user in terms of the authorization process, there are various aspects that should be taken into consideration.

Posted on 3 Oct 2021

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Sustainable Groundwater Use

Technical Documents

South Africa (SA) is a water scarce country that is characterised by extreme climatic conditions and evaporation rates that often exceed precipitation. The country is projected to have a 17% water supply deficit by 2030 (DWS, 2019). This can be mitigated by increasing water efficiency and diversifying water sources. By 2040, alternative sources such as […]

Posted on 23 Sep 2021

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Bore hole water shooting up

The comprehensive checklist for drilling a borehole

Knowledge Hub » Technical Documents

Written by Dale Barrow  Drilling and having a borehole is an asset that should last you at least 10 to 15 years at very little ongoing cost, provided you do everything correctly at the start! If you don’t, it can become a very expensive and time-consuming liability with continual repair or replacement of pumps. The […]

Posted on 13 Sep 2021

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Know your borehole: A hydrogeologist’s perspective

Knowledge Hub » Technical Papers

Recognition of groundwater’s contribution to water supply, including garden irrigation, crop irrigation, stock watering, potable and town supply, is ever increasing. This is driven by inconsistent rainfall patterns, climate change and an increase in water demand. With drill rigs of all shapes and sizes running around between drill sites, it is appropriate that we spend some time outlining some important aspects regarding a successful borehole – it goes beyond just selecting the correct drill site!

Posted on 11 Sep 2021

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Construction of the Kharkams Sand Bed Filter

What is Managed Aquifer Recharge (MAR) and How Does it Work?

Knowledge Hub » Technical Documents

By Kes Murray Understanding Groundwater recharging Managed Aquifer Recharge (MAR), sometimes referred to as Artificial Recharge, is the process by which a water source is intentionally injected or infiltrated into an aquifer. There are a wide variety of reasons for doing this, as well as a range of methods and technologies that are used to […]

Posted on 8 Feb 2021

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Drill Rig

Borehole Yield Testing

Knowledge Hub » Technical Documents

How to correctly follow a borehole yield test? The South African National Standard for the test pumping of water boreholes (SANS 10299-4:2003) clearly prescribes how the borehole yield testing is to be carried out. Remember the Department of Water and Sanitation (DWS) will only authorise groundwater use if the correct (above) method of borehole yield […]

Posted on 24 Oct 2020

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Contaminated Land: The unsettling legacy of human activity and industrialisation

Knowledge Hub » Technical Papers

The land we live, work and walk on is the only one we have and therefore contamination from human activity and industrialisation is a real issue strongly linked to our common past, present and future. It is important to remember that contamination is something that has occurred in the past, is occurring in the present and it will occur in the future. It is therefore crucial that these concerns are addressed.

Posted on 13 Oct 2020

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Groundwater Webinar

Knowledge Hub » Webinars

Posted on 23 Sep 2020

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Sustaining Groundwater Resources in a Unique Region of South Africa

Knowledge Hub » Technical Documents

Just 200 km north of Cape Town, South Africa, you’ll find a unique area that boasts a wide range of landscapes – from rugged mountains to lush river valleys.

Posted on 9 Apr 2020

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Groundwater Cycle

Knowledge Hub » Technical Papers

Groundwater supply project lifecycle

Posted on 25 Sep 2019

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The Malmesbury Group – an aquifer of surprising significance

Knowledge Hub » Published Papers

The Malmesbury Group has often been overlooked as a useable source of groundwater. This is due to its previously generalised low yields and relatively higher salinities of groundwater found in these weathered to fresh sedimentary and metasedimentary rocks.

Posted on 1 Sep 2019

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Client Testimonial

If I may also take the opportunity to compliment Marilie and GEOSS in persevering with the compilation of the GIS data, it’s been a mammoth task.

— Steve Holt – Corrosion Control Group (CCG)

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