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Hydrology 2016, 3(1), 1;

Characterization of Water Level Variability of the Main Ethiopian Rift Valley Lakes

Department of Geography, University of Bonn, Bonn 53115, Germany
Institute for Technology and Water Resources Management in the Tropics and Subtropics, Cologne University of Applied Sciences, Köln 50678, Germany
Institute of Technology, School of Water Resources Engineering, Hawassa University, Hawassa, Ethiopia
Author to whom correspondence should be addressed.
Academic Editor: Luca Brocca
Received: 26 October 2015 / Revised: 18 December 2015 / Accepted: 21 December 2015 / Published: 25 December 2015
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In this paper, the water level fluctuations of eight Ethiopian Rift Valley lakes were analyzed for their hydrological stability in terms of water level dynamics and their controlling factors. Long-term water balances and morphological nature of the lakes were used as bases for the analyses. Pettit’s homogeneity test and Mann–Kendall trend analysis were applied to test temporal variations of the lake levels. It is found that the hydrological stability of most of the Ethiopian Rift Valley lakes is sensitive to climate variability. In terms of monotonic trends, Lake Ziway, Hawassa, Abaya and Beseka experienced significant increasing trend, while Ziway, Langano and Chamo do not. In addition, homogeneity test revealed that Lake Hawassa and Abaya showed significant upward shift around 1991/1992, which was likely caused by climate anomalies such as the El Niño / Southern Oscillation (ENSO) phenomena. Lake Abiyata is depicted by its significant decreasing monotonic trend and downward regime shift around 1984/1985, which is likely related to the extended water abstraction for industrial consumption. View Full-Text
Keywords: Ethiopian Rift valley lakes; water level fluctuation; climate variability Ethiopian Rift valley lakes; water level fluctuation; climate variability

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Belete, M.D.; Diekkrüger, B.; Roehrig, J. Characterization of Water Level Variability of the Main Ethiopian Rift Valley Lakes. Hydrology 2016, 3, 1.

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