Water leakage investigation of micro-dam reservoirs in Mesozoic sedimentary sequences in Northern Ethiopia

► Conceptual geological model developed to illustrate leakage mechanisms. ► Leakage zones and leaky geological units identified in the micro-dams. ► Geotechnical drilling data analyzed and evaluated. ► Hydraulic conductivity of the rock units determined using different approaches. ► Vertical electrical resistivity (VES) evaluated in light of water leakage.