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Key Principles
The Cost-Effective Boreholes flagship work has enabled a number of key principles for cost-effective boreholes to be identified as follows:
1. Borehole Standards and Designs
Boreholes should be designed and constructed to fit their purpose in terms of diameter, depth, casing and screen.
2. Equipment - Smaller and Less Costly Rigs
Smaller and less costly rigs should be utilized to provide boreholes that are fit for their designed purpose.
3. Contract Packaging
Contracts should be packaged for multiple boreholes in close proximity and for boreholes with similar geology.
4. Hydrogeological Knowledge and Siting Practices
Knowledge of hydrogeology should be improved and appropriate siting practices utilized.
5. Test Pumping and Well Development
Test pumping requirements should be matched to borehole purpose while taking into account the importance of data to improve the understanding of hydrogeology and water resources. Drilled wells must be developed until the water if free of solids and fine materials (fines).
7. Rigorous Evaluation of Groundwater Resources
Rigorous evaluation of groundwater resources should be undertaken and information made readily available.
8. Sustainable O&M Procedures
O&M procedures to ensure the sustainability of pumped groundwater sources should be established
9. Private Sector
Private contractors should be supported regarding importation, local manufacture, taxation, workflow and to professionalize.
10. Procurement, Contract Management, Payment and Regulation
Procurement should ensure that the least-expensive, but high quality boreholes and pumps are constructed and installed. Suitable contract mamagement must be undertaken and payment for goods and services should be timely
CEB References
Click here for a list of reports and country studies on cost-effective boreholes.
