Our professional team, many of whom have more than 30 years’ experience in their field, are able to offer the following specialist skills.
- Geophysical surveys.
- Groundwater resource evaluation and mapping.
- Borehole siting, supervision of drilling and equipping of borehole.
- Well field design, development, management and monitoring.
- Hydrogeological investigation for waste disposal sites and sanitation.
- Design & installation of shallow wells and infiltration galleries.
- Water license applications.
- Groundwater quality and pollution.
- Groundwater modelling.
- Surface water / groundwater interaction modelling.
Projects Completed
Groundwater Masterplan Polokwane Municipality, Limpopo Province
Main aim was to identify groundwater shortfall to Polokwane and surrounding peri-urban and rural communities. Once the magnitude of shortfall was identified, to develop additional groundwater to meet water demand to 2040. The project locality is in the Limpopo Province to a radius of 50 Km around Polokwane. The project commenced in 2018 and will be completed by 2020.
- Planning and project inception
- Test existing boreholes
- Identification of groundwater supply targets in shortfall areas
- Geophysical surveys : electrical resistivity, electro magnetic surveys (EM 34), magnetics surveys
- Drilling, yield testing and water sampling for quality
- Aquifer modelling, water licensing and engineering recommendations.
Client: Water and Sanitation Groupfor Polokwane Municipality
Contact: Dr Abbas Shaker
Tel: 084 592 6822
Groundwater Development Proposed new Makhado Mine, Limpopo Province
Main aim was to identify groundwater well fields to serve as bulk water augmentation to the proposed mine. The project was executed from 2008 and was completed in 2010.
In excess of 2.4 million litres per day was developed from groundwater sources to supply the mine. The project consisted of:
- Planning and project inception
- Remote sensing (air photo and satellite interpretation)
- Geophysical surveys : electrical resistivity, electro-magnetic and magnetics
- Drilling, yield testing and water sampling for quality
- Data interpretation, recommended production boreholes, pumping rates, pumping schedules, blending to obtain suitable water quality, management and monitoring plan.
- Engineering design and reporting.
Client: Coal of Africa
http://www.coalofafrica.com
Groundwater Impact Assessment for the Proposed new Makhado Mine, Limpopo Province
Main aim was to identify the impacts the proposed mine would have on the groundwater system. The project was executed from 2008 and was completed in 2012.
The project involved the following:
- Planning and project inception
- Determining the baseline conditions at the site
- Setting up a conceptual groundwater model
- Geophysical surveys : electrical resistivity, electro magnetic and magnetics
- Conducting drilling, pumping tests, packer tests, water sampling, lithological sampling
- Data interpretation to determine aquifer parameters, recharge, interaction with surface water, existing use, water quality, potential for acid mine drainage and pollution and recommend and implement a management and monitoring plan.
- Set up a numerical model, using the USGS MODFLOW2000 Finite Difference groundwater model in the US Department of Defence GMS 7.0 (Groundwater Modelling System) interface, to simulate and plot groundwater flow and leachate plume migration.
- The model was used to determine the groundwater balance pre- and post mining, determine potential mine inflows, determine drawdown cone around mine at various mining intervals, determine when and where potential decant would occur and evaluate pollution plume migration
- A technical report giving the findings, risks and mitigation measures required.
Client: Coal of Africa
http://www.coalofafrica.com
Water Resource Development for Rhodes Food Group Dzanani Factory, Limpopo Province
Main aim was to identify water resources which could be utilised for the canning factory. The project was executed from 2013 and was completed in 2016.
The project developed a weir abstraction system, refurbished 3 existing boreholes and developed an additional 3 production boreholes. The system is capable of yielding 775 000 litres/day to meet the factories demand.
- Planning and project inception
- Remote sensing (air photo and satellite interpretation)
- Geophysical surveys : electrical resistivity, electro magnetic and magnetics
- Drilling, yield testing and water sampling for quality
- Data interpretation, recommended production boreholes, pumping rates, pumping schedules, management and monitoring plan and reporting.
- Engineering design and construction of the scheme.
Client: Rhodes Food Group, Dzanani Factory, Limpopo Province
Contact: Leon Cilliers
Tel: 015 970 4663
Lebowakgomo Bulk Groundwater Project October 2015
WSM Leshika Consulting was commissioned to identify a significant aquifer and to develop groundwater to serve as bulk water supply to 15 villages in the Lepelle Nkumpi Local Government area of jurisdiction, Limpopo Province. Exploration drilling commenced during October 2015 and was completed by December 2015. A highly specialized drilling technique was required (symmetrix 273 mm diameter) to complete boreholes successfully. A total of 5.8 million liters per day was developed with a second phase planned for 2017 – 2018 for a further 3 million liters per day.
- Planning and project inception
- Geophysical surveys
- Drilling, yield testing and water sampling for quality
- Engineering design and report, aquifer modelling and water use license application.
Ga Mathabatha and Moleke Bulk Groundwater Project September 2018
WSM Leshika Consulting was commissioned to identify and develop a significant aquifer to serve as bulk water supply to several villages in the Lepelle Nkumpi Local Government area of jurisdiction, Limpopo Province. Exploration drilling commenced during July 2018 and was completed by September 2018. A highly specialized drilling technique was required (symmetrix 273 mm diameter) to complete boreholes successfully. A total of 15 million liters per day was developed with some boreholes each supplying over 2 million liters per day.
- Planning and project inception
- Geophysical surveys
- Drilling, yield testing and water sampling for quality
- Hydrogeological design and report
Client: Morwa Consulting Engineers for Capricorn District Municipality
Contact: Masilo Sekhula
Tel: 083 708 5585
Groundwater Augmentation and Development of the Coastal Aquifer at Dias Cross
Primary objective was to identify additional groundwater within the coastal aquifer. To develop this source and to manage the well field in order to optimise abstraction within the constraints of maximum short-term yield and degradation of source via saline and/or brak water intrusion. The locality is in the Eastern Cape, South Africa at Kenton on Sea and Bushman’s River Mouth. The project was executed during April – May 2002.
A complex and multi-disciplinary approach was adopted in order to define the boundaries of the fresh water lense in a coastal environment. Detailed remotely secured data was backed up by shallow drill hole sampling. Complex test pump modelling of the aquifer was completed to prevent saline and/or brak water intrusion into the fresh water aquifer.
- Planning and project inception
- Geophysical surveys (Schlumberger Array), electromagnetic surveys (Max-Min)
- Drilling, yield testing and water sampling for quality
- Engineering design, report and aquifer modelling.
Sekgopo Bulk Groundwater Project, Alluvial Aquifer
Main aim was to identify additional groundwater within the water scarce Sekgopo rural community. The locality is in the Limpopo Province, South Africa at Sekgopo Village, approximately 60 km north east of Polokwane. The project was executed during August 2002.
Additional groundwater was required to supply 22 000 people. A single borehole was drilled with a supply output of 660 kl/day, meeting the water demand to RDP standard.
- Planning and project inception
- Geophysical surveys (electrical resistivity and magnetics)
- Drilling, yield testing and water sampling for quality
- Engineering design, report and aquifer modelling.
Groundwater Masterplan Mogalakwena Municipality, Limpopo Province
Main aim was to identify additional groundwater well fields to serve as bulk water augmentation to 168 villages. The project locality is in the Limpopo Province, from Mokopane in the south west to Rebone in the north east. The project was executed from 2011 and was completed in July 2017 and was funded under DWS : MIG, MWIG and WSIG programs.
In excess of 24 million liters per day was developed from groundwater sources to supply the communities up until 2040.
- Planning and project inception
- Geophysical surveys : electrical resistivity, electro magnetic surveys (EM 34), magnetics and electro-seismic surveys
- Drilling, yield testing and water sampling for quality
- Engineering design, report and aquifer modelling.
