Indexed in Scopus Compendex and Geobase Elsevier, Chemical Abstract Services-USA, Geo-Ref Information Services- USA, List B of Scientific Journals, Poland, Directory of Research Journals www.cafetinnova.org ISSN 0974-5904, Volume 08, No. 03 June 2015, P.P.36-46 Groundwater Management for Irrigation in the Raya and Kobo Valleys, Northern Ethiopia NATA TADESSE1, DESSIE NEDAW2, KIFLE WOLDEAREGAY1, TESFAMICHAEL GEBREYOHANNES1 AND FRANK VAN STEENBERGEN3 1Department of Earth Sciences, Mekelle University; 2School of Earth Science, Addis Ababa University; 3MetaMeta, the Netherlands; Email:
[email protected],
[email protected] Abstract: The study area, Raya and Kobo valleys, are located in the northern parts of Ethiopia. From the hydrological point of view, the sites are located within the Afar drainage basin. The areal coverage of the valleys is 2369 km2 for Raya and 1439 km2 for Kobo. The amount of groundwater that is currently discharged for irrigation purpose in Raya and Kobo valley is 10755.9 m3/day and 30600 m3/day, respectively. This is estimated to be about 0.06% and 6.91% of the total safe groundwater discharge of each valley, respectively. The annual average groundwater recharge in the Raya valley is estimated to be 84 million cubic meters and that of the Kobo valley is 122.9 million cubic meters. At present, the amount of natural recharge in both valleys is more than the abstraction. With regard to the irrigation development in the valleys, the problem is not lack of water; it is rather absence of or poor management. This is mainly due to absence of responsible and efficient institutions that are equipped with adequate capacity.