Author(s)

Asaminew Abiyu Cherinet¹, Denghua Yan^1,2,3*, Hao Wang^1,2,3, Xinshan Song¹, Tianlin Qin^2,3, Mulualem T. Kassa⁴, Abel Girma^1,5, Batsuren Dorjsuren⁶, Mohammed Gedefaw^1,5, Hejia Wang⁷, Otgonbayar Yadamjav⁸

¹College of Environmental Science and Engineering, Donghua University, Shanghai, China.
²State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research (IWHR), Beijing, China.
³Department of Water Resources, China Institute of Water Resources and Hydropower Research (IWHR), Beijing, China.
⁴Bio-Taq Economy Innovations (BioTEI) Inc., Winnipeg, Canada.
⁵Department of Natural Resource Management, University of Gondar, Gondar, Ethiopia.
⁶Department of Environment and Forest Engineering, School of Engineering and Applied Sciences, National University of Mongolia, Ulaanbaatar, Mongolia.
⁷Department of Hydraulic Engineering, Tsinghua University, Beijing, China.
⁸Department of Sociology and Social Work, School of Art & Sciences, National University of Mongolia, Ulaanbaatar, Mongolia.

Projecting future changes of streamflow in the Abby River Basin (ARB) is important for planning and proper management of the basin system. The current study conducted in five stations of the Abbay river basin, and investigated the annual temperature, precipitation, and river discharge variability using the Innovative trend analysis method, Mann-Kendall, and Sen’s slope test estimator. The result showed a slightly increasing trend of annual precipitation in Assoa (Z = 0.71), Bahir Dar (Z = 0.13), and Gonder (Z = 0.26) stations, while a significant increasing trend was observed in Nedgo (Z = 2.45) and Motta (Z = 1.06) stations. Interestingly, the trend of annual temperature in Assosa (Z = 5.88), Bahir Dar (Z = 3.87), Gonder (Z = 4.38), Nedgo (Z = 4.77), and Motta (Z = 2.85) was abruptly increased. The average mean temperature has increased by 0.2°C in the past 36 years (1980 to 2016). The extreme high temperature was observed in the semi-dry zone of northern Ethiopia. During the study period, a significant declining trend of the river discharge was recorded, and the river discharge was sharply decreased from 1992 onwards. The results of the current study showed annual variability of river discharge, precipitation, and temperature of the study area of the basin that could be used as a basis for future studies.

Abbay River Basin, Climate Change, Ethiopia, Precipitation, River Discharge, Temperature

Cherinet, A. , Yan, D. , Wang, H. , Song, X. , Qin, T. , Kassa, M. , Girma, A. , Dorjsuren, B. , Gedefaw, M. , Wang, H. and Yadamjav, O. (2019) Climate Trends of Temperature, Precipitation and River Discharge in the Abbay River Basin in Ethiopia. Journal of Water Resource and Protection, 11, 1292-1311. doi: 10.4236/jwarp.2019.1110075.