TGS Water Services

TGS Water Ltd has been involved in various projects since it was founded in 2007. These projects concern the drilling of deep boreholes and shallow boreholes, the protection of springs and the rehabilitation and test pumping of boreholes in Lira, Apac, Gulu, Amuria, Pader, Kitgum, Oyam and Dokolo Districts in Uganda.

Among the clients of TGS Water are many well respected NGOs such as the Lutheran World Federation, Goal, Caritas, Norwegian Agroforestry Project and drilling companies like Sumadura Technologies Ltd. and Transafrica Well Drilling Ltd.

Deep Well Drilling

TGS can provide deep well drilling services under different contract conditions. These types of water sources are recommended in areas where there is no shallow borehole or protected spring potential. For the Lutheran World Foundation (LWF), TGS constructed 10 deep wells in Pader and Kitgum District on a no-water-no-payment contract basis. Some Clients prefer to take the risk of dry boreholes themselves, aiming at reducing costs. TGS can advise Clients on the most favourable contract type for their area of operation.

Shallow borehole drilling

The option of drilling shallow boreholes to alleviate water stress in rural areas is greatly underutilised in Uganda. This is remarkable because the costs for shallow boreholes is 50-60% of deep boreholes (for more information see paper by Mulders and Sloots. TGS Holland acknowledged the need of reducing costs in water programmes aiming at increasing the number of people served per euro spent. Caritas and TGS Water Ltd. have already constructed 60 shallow boreholes in areas where up to then only deep wells were constructed. Please let yourself be advised of what is the best option for you to develop a water source in your area of operation.

Spring protection

This is one of the cheapest options to provide the rural population with safe water. SAP has financed more than 60 springs in Lira Diocese. TGS can provide staff to make assessments to see whether the seepage zone or spring well in your areas are suitable for spring protection.

Borehole rehabilitation

A large number of boreholes in the rural areas are non functional. TGS Water can assess the reason for this non-functionality of the borehole and often is able to repair the borehole in order for it to work again for a couple of years provided the borehole is well maintained. We have been carrying out such programmes for IRC in Kitgum and Pader Districts in Uganda.

Test pumping

Before a borehole is installed with a pump its sustainable yield is first assessed through a pumping test. For boreholes to be equipped with a hand pump, 3 hour pumping tests will suffice. For boreholes to be equipped with a submersible pump (production wells) a test pumping programme consisting of a step test and a constant rate test needs to be carried out. TGS has carried out such programmes for AVSI and Goal.

Small piped water systems

Institutions like schools and hospitals often need more than the 700 liters per hour that a handpump can supply. If the yield of the borehole is more than 1000 liters per hour one can consider to equip it with a submersible pump and pump the water to an elevated storage tank, from where it will be distributed to different spots on the school or hospital compound. The pumps will be driven by solar power, ordinary power supply or by generators. TGS Water Ltd. has subcontracted WE Consult to construct these systems for small communities, hospitals, schools and church compounds.

Hydrogeological investigations and geophysical surveys

The first step of a successful drilling program is a proper hydrogeological and geophysical survey to determine the optimum drilling site. The data will be analysed using professional software. For rural water supplies (hand pump boreholes) 2 perpendicular resistivity profiles are run in a village and on anomalies a VES is carried out. Such a survey will take a day. If a Client would like to have production wells then he is advised to carry out a more detailed investigation for which detailed aerial photographs are ordered and analysed using a stereoscope and in which more detailed investigations are carried out. Such a survey will take approximately 2 days per borehole. The approaches developed by WE Consult will significantly increase the success rates of your projects. WE Consult has a large borehole database and information from the database will already help to assess the groundwater potential in your area of operation.