Characterization of regional variability of seasonal water balance within Omo-Ghibe River Basin,Ethiopia |
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| Authors: | AY Jillo SS Demissie A Viglione DH Asfaw M Sivapalan |
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| Institution: | 1. Ethiopian Institute of Water Resources, Addis Ababa University, Addis Ababa, Ethiopia;2. Institute of Hydrology and Water Resources Management, Vienna University of Technology, Vienna, Austria;3. Department of Civil and Environmental Engineering, Addis Ababa Institute of Technology, Addis Ababa University, Addis Ababa, Ethiopia;4. Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, Hydrosystems Laboratory, Urbana, IL, USA;5. Department of Geography and Geographic Information Science, University of Illinois at Urbana Champaign, Champaign, IL, USA |
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| Abstract: | In this study we quantify the spatial variability of seasonal water balances within the Omo-Ghibe River Basin in Ethiopia using methods proposed within the Prediction in Ungauged Basins initiative. Our analysis consists of: (1) application of the rainfall–runoff model HBV-Light to several sub-catchments for which runoff data are available, and (2) estimation of water balances in the remaining ungauged catchments through application of the model with regionalized parameters. The analyses of the resulting water balance outcomes reveal that the seasonal water balance across the Omo-Ghibe Basin is driven by precipitation regimes that change with latitude, from being strongly “seasonal” in the north to “precipitation spread throughout the year, but with a definite wetter season” in the south. The basin is divided into two distinct regions based on patterns of seasonal water balance and, in particular, seasonal patterns of soil moisture storage. EDITOR D. KoutsoyiannisASSOCIATE EDITOR A. Efstratiadis |
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| Keywords: | Omo-Ghibe River Basin HBV-Light parameter regionalization flow prediction in ungauged catchments hydrology seasonal water balance signature of catchment response |
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