SubSurface Dams - Sustainable Sanitation and Water Management ...
SubSurface Dams - Sustainable Sanitation and Water Management ...
SubSurface Dams - Sustainable Sanitation and Water Management ...
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Groundwater level assumed from the results of electricsoundings <strong>and</strong> observation in boreholesMain road between Ougadougou <strong>and</strong>KayaDivisionElectric resistivity(Ω-m)Meaning2910~150>1000Topsoil (clay-s<strong>and</strong>)Weathered crust( gravel <strong>and</strong> rock)Depth (m)Electricresistivity (Ω-m)50-100, one part ofwhich is lower than50800~>1000Heavily weathered layer ofbasement rock(clay, partially gravel)Slightly weatheredbasement rockVariableOld river sediment (abovethe groundwater level)