Identify the Impacts of the Grand Ethiopian Renaissance Dam on Watershed Sediment and Water Yields Dynamics

Peng Li, Zhen He, Jianwu Cai, Jing Zhang, Marye Belete, Jinsong Deng and Shizong Wang
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Peng Li: School of Public Affairs, Zhejiang University, Hangzhou 310058, China
Zhen He: Zhejiang Forestry Technology Extended Station, Hangzhou 310020, China
Jianwu Cai: Tongxiang Forestry Working Station, Jiaxing 314599, China
Jing Zhang: The Rural Development Academy, Zhejiang University, Hangzhou 310058, China
Marye Belete: College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
Jinsong Deng: College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
Shizong Wang: School of Public Affairs, Zhejiang University, Hangzhou 310058, China

Sustainability, 2022, vol. 14, issue 13, 1-16

Abstract: The construction of large-scale water reservoir facilities in transboundary river basins always arouses intense concern and controversy. The Grand Ethiopian Renaissance Dam (GERD) under construction in Ethiopia is perceived to affect water security in Egypt and Sudan. Therefore, this study investigated the water and sediment balance of the Blue Nile River (BNR) basin and identified the spatio-temporal variation in sediment and water yields along with the construction of GERD using Integrated Valuation of Ecosystem Services and Tradeoffs (InVEST) sediment and water yield models. The BNR basin experienced increasing water and sediment yields between 1992 and 2020 and has shown a growth trend since 2020. The lion’s share of water and sediment yields come from upstream of the GERD. Taken together, these results imply that the construction of the GERD will serve as a water storage and silt trap for Sudan and Egypt.

Keywords: water yield; sediment yield; sustainable development; GERD; InVEST model (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
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