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An Assessment of Hand Drilling Potential in Upland and Lowland Malawi
Hand drilling methods can offer low cost, rapid access to shallow, unconsolidated
aquifers typically found in dambo environments (seasonally waterlogged African
wetlands).
This thesis presents the findings from an evaluation of three hand drilling techniques (augering, percussion drilling, and borehole jetting) regarding to their suitability for groundwater supply in upland and lowland dambos in Malawi.
Through the drilling of 19 test boreholes, typical sub surface dambo geologies were
assessed in terms of aquifer suitability to hand drilling applications. Drilling rates were recorded to examine the performance of a certain technique in particular ground conditions. A comparison between hand drilled boreholes and hand dug wells in dambos is also presented emphasizing the relative importance of implementation cost, convenience of construction and location.
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