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Conceptual groundwater flow model of the Mekelle Paleozoic-Mesozoic Sedimentary Outlier and surroundings (Northern Ethiopia): using environmental isotopes and Electrical Conductivity patterns in groundwater

Ermias Hagos Girmay1, Tenalem Ayenew2, Seifu Kebede2, Mulugeta Alene2, Stefan Wohnlich3, Frank Wisotzky3
1 Lehrstuhl Angewandte Geologie, Ruhr-Universität Bochum and School of Earth Sciences, Addis Ababa University
2 School of Earth Sciences, Addis Ababa University
3 Lehrstuhl Angewandte Geologie, Ruhr-Universität Bochum

P 2.12 in Hydrogeologie von Hardrock und Kluftgesteinen / Grundwasser und Karst

A wide range of lithologic units and tectonic disturbances by cross-cutting faults and folds has resulted in a quite complex hydrogeological setting of the Mekelle Sedimentary Outlier and surroundings in Northern Ethiopia. Environmental isotopes of oxygen and hydrogen and patterns of total ionic concentrations in groundwater have been used to conceptualize the groundwater flow dynamics and recharge- discharge mechanisms in the area. Shallow, intermediate and deep groundwater flow systems have been identified. The range of tritium activities (1.73 - 3.66TU) in the shallow and deep groundwater samples have indicated that modern time recharge is dominant in the aquifers of the study area.

Letzte Änderung 14.04.2014