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Assessment of Climate Change Impacts for Balancing Transboundary Water Resources Development in the Blue Nile Basin

Author

Listed:
  • Mihretab G. Tedla

    (International Centre for Water Hazard and Risk Management under the Auspices of UNESCO (ICHARM) & Public Works Research Institute (PWRI), 1-6 Minamihara, Tsukuba 305-8516, Japan
    National Graduate Institute for Policy Studies (GRIPS), Roppongi, Minato-ku, Tokyo 106-8677, Japan)

  • Mohamed Rasmy

    (International Centre for Water Hazard and Risk Management under the Auspices of UNESCO (ICHARM) & Public Works Research Institute (PWRI), 1-6 Minamihara, Tsukuba 305-8516, Japan
    National Graduate Institute for Policy Studies (GRIPS), Roppongi, Minato-ku, Tokyo 106-8677, Japan)

  • Katsunori Tamakawa

    (International Centre for Water Hazard and Risk Management under the Auspices of UNESCO (ICHARM) & Public Works Research Institute (PWRI), 1-6 Minamihara, Tsukuba 305-8516, Japan)

  • Hemakanth Selvarajah

    (International Centre for Water Hazard and Risk Management under the Auspices of UNESCO (ICHARM) & Public Works Research Institute (PWRI), 1-6 Minamihara, Tsukuba 305-8516, Japan
    National Graduate Institute for Policy Studies (GRIPS), Roppongi, Minato-ku, Tokyo 106-8677, Japan)

  • Toshio Koike

    (International Centre for Water Hazard and Risk Management under the Auspices of UNESCO (ICHARM) & Public Works Research Institute (PWRI), 1-6 Minamihara, Tsukuba 305-8516, Japan
    National Graduate Institute for Policy Studies (GRIPS), Roppongi, Minato-ku, Tokyo 106-8677, Japan)

Abstract

An assessment of climate impacts in the hydrologic system of the Blue Nile basin is useful for enhancing water management planning and basin-wide policymaking. Climate change adaptation activities predominantly require an understanding of the range of impacts on the water resource. In this study, we assessed climate change impacts on the Blue Nile River using 30-year in situ climate data (1981–2010) and five bias-corrected General Circulation Models (GCMs) for future (2026–2045) climate projections of RCP8.5. Both historical and GCM precipitation projections show inter-annual and spatial variability, with the most significant increases in the rainy season and a significant decrease in the dry season. The results suggest the probability of an increase in total precipitation. The intensity and frequency of future extreme rainfall events will also increase. Moreover, the hydrological model simulation results show a likely increase in total river flow, peak discharges, flood inundation, and evapotranspiration that will lead to a higher risk of floods and droughts in the future. These results suggest that the operation of water storage systems (e.g., the Grand Ethiopian Renaissance Dam) should be optimized for Disaster Risk Reduction (DRR) and irrigation management in addition to their intended purposes in the Nile basin.

Suggested Citation

  • Mihretab G. Tedla & Mohamed Rasmy & Katsunori Tamakawa & Hemakanth Selvarajah & Toshio Koike, 2022. "Assessment of Climate Change Impacts for Balancing Transboundary Water Resources Development in the Blue Nile Basin," Sustainability, MDPI, vol. 14(22), pages 1-20, November.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:22:p:15438-:d:978945
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    1. repec:wbk:wbpubs:12421 is not listed on IDEAS
    2. World Bank, 2006. "Africa Development Indicators 2006," World Bank Publications - Books, The World Bank Group, number 12419, April.
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    Cited by:

    1. Shokry Abdelaziz & Ahmed Mohamed Mahmoud Ahmed & Abdelhamid Mohamed Eltahan & Ahmed Medhat Ismail Abd Elhamid, 2023. "Long-Term Stochastic Modeling of Monthly Streamflow in River Nile," Sustainability, MDPI, vol. 15(3), pages 1-15, January.

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