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Understanding runoff generation processes and rainfall runoff modelling in the Meja watershed of Ethiopia

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Title Understanding runoff generation processes and rainfall runoff modelling in the Meja watershed of Ethiopia
 
Creator Berhane, S.
Zemadim, Birhanu
Haile, D.
Melesse, A.
 
Subject water
 
Description Understanding the basic relationships between rainfall, runoff, soil moisture and ground water level are vital for an effective and sustainable water resources planning and management activities. But so far there are no hydrological studies in Meja watershed that aims to understand the watershed characteristics and runoff generation processes. This study was conducted to understand runoff generation processes and model rainfall runoff relationship in Meja watershed having a drainage area of 96.6 km2. The watershed is one of the three research sites of International Water Management Institute (IWMI) developed in early 2010 in the upper Blue Nile Basin of Ethiopia. In the study, primary data of soil moisture, shallow ground water level, rainfall and runoff were collected from the hydrological monitoring network in the watershed. Hydrological models like HBV and RRL SMAR were configured to understand the relationship between rainfall and runoff in the watershed. Relationships between rainfall, soil moisture, shallow ground water level and discharge were developed to understand runoff generation processes in the watershed. According to one year and three months data, there is no strong daily rainfall and runoff relationship (r2 0.65) in monthly basis of Kolu nested sub-watershed but there is moderate relationship of rainfall and ground water level. There is strong linear relationship of rainfall and monthly averaged volumetric soil moisture in most layers of Meja and its nested sub-watersheds. The general relationship between runoff and monthly averaged soil moisture at different layers in Meja watershed and Kolu is strong and linear. Analysis of rainfall runoff models indicated better performance of HBV than RRL SMAR model.
 
Date 2013-11-01
2013-12-14T15:02:40Z
2013-12-14T15:02:40Z
 
Type Book Chapter
 
Identifier Berhane, S., Zemadim, B., Haile, D. and Melesse, A. 2013. Understanding runoff generation processes and rainfall runoff modelling in the Meja watershed of Ethiopia. IN: Wolde, M. (ed). 2013, Rainwater management for resilient livelihoods in Ethiopia: Proceedings of the Nile Basin Development Challenge Science Meeting, Addis Ababa, 9–10 July 2013. NBDC Technical Report 5. Nairobi, Kenya: ILRI.
https://hdl.handle.net/10568/34264
 
Language en
 
Relation https://hdl.handle.net/10568/33929
NBDC Technical Report
 
Rights Open Access
 
Format application/pdf
 
Publisher International Livestock Research Institute