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GROUND WATER RESOURCES OF ETHIOPIA

Ethiopia has abundant surface and ground water resources potential of which groundwater has a lion-share. The preliminary estimated amount of yearly groundwater recharge of the country is about 28,000 Mm 3 . Recent studies indicated that the potential is much greater than this amount. Most of the developed groundwater resources is mainly used for domestic and industrial water supply. So far, only 20.4% of the Ethiopian landmass has been mapped at 1:250,000, 36.8% at one million scale and the whole country at two million scale (Ethiopian Geological Survey).

Ground waters in unconsolidated aquifers are usually of excellent quality; being naturally filtered. The water is normally clear, colorless, and free from microbial contamination and thus requires minimal treatment. As a consequence of the slow travel times in the flat plains and due to the long contact time with the sediment, the groundwater often contains significant quantities of minerals in solution. This solute content varies and depends on the residence time of water in the aquifer and the mineral composition.
Source: http://www.mowr.gov.et/index.php?pagenum=2.2&pagehgt=880px