A new study conducted by Dr Sean Avery and released by the African Study Centre reveals a much grimmer picture of the impact of the building of Gibe III Dam on the Omo River and associated large scale irrigation-dependent plantations in Ethiopia would have on the Lake Turkana and Lower Omo Basins. The report shows how Gibe's regulation of the flow of the Omo will alter the annual flood regime upon which the agro-pastoralists of the lower Omo depend for their livelihoods and how it will, coupled with the abstraction of Omo water for large-scale irrigation will alter the hydrological inflow patterns to Lake Turkana, directly impacting the ecology of the world's largest lake.
This is the second comprehensive study of the impact of Gibe on the hydrology of Lake Turkana and Lover Omo that the Nairobi-based consultant hydrologist and civil engineer, Dr Sean Avery, has conducted. Dr Avery previously carried out the only comprehensive assessment of the impact of the dam on Lake Turkana and Lower Omo - commissioned by the African Development Bank (AfDB) - but that was before the full scale of planned irrigation-dependent large scale plantation development was known.
A few months after the AFDB report was submitted, the full extent of planned irrigation development in the lower Omo became clearer, with the announcement that the state-run Ethiopian Sugar Corporation would soon begin developing 150,000 hectares of irrigated sugar plantations. It became necessary to conduct a new study to consolidate the previous findings with the new information.
Dr Avery's new report is now available to download from the website of the University of Oxford's African Studies Centre. We have placed the links to the two volume report and an executive summary here. You can also read Dr Avery's first report in the Documents Downloads section of our website.