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Stochastic Investigation of the GERD-AHD Interaction Through First Impoundment and Beyond

Chapter
Part of the The Handbook of Environmental Chemistry book series

Abstract

The Grand Ethiopian Renaissance Dam (GERD) is currently being constructed on the Blue Nile. In the short term, water inflow to the Aswan High Dam (AHD) reservoir will be reduced as water is abstracted during GERD’s first impoundment. In the long-term, the inflow to AHD will be affected due to flow regulation and additional evaporation losses from GERD. This chapter presents a stochastic analysis of the impacts of GERD on AHD. Synthetic Nile flow series that preserve the Hurst exponent of the flow are generated using a Fractional Gaussian Noise (FGN) model. Results from the simulation of 1,000 equally probable Nile flow series using a simplified GERD-AHD system model are analyzed. The results indicate a very high downstream risk when GERD is operated as an annual storage reservoir, which questions the economic attractiveness of GERD in a regional context when operated solely for hydropower energy maximization. Operating GERD as a long-term storage reservoir results in reduced, yet still considerable impacts. Optimal GERD filling and operation policies aimed at minimizing downstream risks through a comprehensive regional economic, environmental, and social analysis are urgently needed.

Keywords

Aswan high dam Extended drought Grand Ethiopian Renaissance Dam Hurst phenomenon Impact assessment Stochastic simulation Water deficiency 

References

  1. 1.
    Hurst HE (1951) Long-term storage capacity of reservoirs. Trans Am Soc Civ Eng 116:770–799Google Scholar
  2. 2.
    Salas JD, Delleur JW, Yevjevich V, Lane WL (1988) Applied modeling of hydrologic time series. Water Resources Publications, LittletonGoogle Scholar
  3. 3.
    McLeod AI, Hipel KW (1978) Preservation of the rescaled adjusted range, 1. A reassessment of the Hurst phenomenon. Water Resour Res 14(3):491–508Google Scholar
  4. 4.
    Hamed KH (2007) Improved finite-sample Hurst exponent estimates using rescaled range analysis. Water Resour Res 43(4):W04413Google Scholar
  5. 5.
    Hurst HE, Black RP, Simaika YM (1978) The Nile Basin, vol X. Nile Control Department, Ministry of Irrigation, CairoGoogle Scholar
  6. 6.
    Koutsoyiannis D, Yao H, Georgakakos A (2008) Medium-range flow prediction for the Nile: a comparison of stochastic and deterministic methods. Hydrol Sci J 53(1):142–164Google Scholar
  7. 7.
    Wheeler KG, Basheer M, Zelalem TM et al (2016) Cooperative filling approaches for the Grand Ethiopian Renaissance Dam. Water Int 41(4):611–634Google Scholar
  8. 8.
    Hassan NA (2013) Performance characteristics of the Aswan High Dam Reservoir under changes in mean inflow, variability, flow pattern and operation rules. MSc thesis, Irrigation and Hydraulics Department, Faculty of Engineering, Cairo University, EgyptGoogle Scholar
  9. 9.
    International Non-partisan Eastern Nile Working Group (2015) The Grand Ethiopian Renaissance Dam: an opportunity for collaboration and shared benefits in the Eastern Nile Basin. Abdul Latif Jameel World Water and Food Security Lab, MIT, CambridgeGoogle Scholar
  10. 10.
    Ethiopian News Agency (2017) Nation to celebrate 6th year anniversary of GERD. http://www.ena.gov.et/en/index.php/economy/item/2990-nation-to-celebrate-6th-year-anniversary-of-gerd. Accessed 31 Aug 2017
  11. 11.
    IPoE (2013) International Panel of Experts on the Grand Ethiopian Renaissance Dam Project. Final Report, Addis Ababa, EthiopiaGoogle Scholar
  12. 12.
    Sadek MF, Shahin MM, Stigter CJ (1997) Evaporation from the reservoir of the Aswan High Dam, Egypt: a new comparison of relevant methods with limited data. Theor Appl Climatol 56(1):57–66Google Scholar
  13. 13.
    Abd Eltawab I (2003) A mathematical model for improving and updating the operation rules of the Aswan High Dam Reservoir. PhD thesis, Irrigation and Hydraulics Department, Irrigation and Hydraulics Department, Faculty of Engineering, Cairo University, EgyptGoogle Scholar
  14. 14.
    Negewo BD, Immerzeel W, Droogers P et al (2011) Middle-East and Northern Africa Water Outlook. FutureWater Report: 98, Wageningen, The NetherlandsGoogle Scholar
  15. 15.
    Blank L, Tarquin A (2013) Engineering economy.7th edn. WCB/McGraw-Hill, New YorkGoogle Scholar
  16. 16.
    International Rivers (2014) The Grand Ethiopian Renaissance Dam Fact Sheet. https://www.internationalrivers.org/resources/the-grand-ethiopian-renaissance-dam-fact-sheet-8213. Accessed 31 Aug 2017
  17. 17.
    IRENA (2012) Hydropower. In: Renewable energy technologies: cost analysis series, Volume 1: Power sector, Issue 3/5. IRENA Secretariat, Abu DhabiGoogle Scholar

Copyright information

© Springer International Publishing AG 2018

Authors and Affiliations

  1. 1.Irrigation and Hydraulics Department, Faculty of EngineeringCairo UniversityGizaEgypt

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