Evaluation of multi-storage hydropower development in the upper Blue Nile River (Ethiopia): regional perspective

Mulat, Asegdew G.; Moges, Semu Ayalew; Moges, Mamaru A.

doi:10.1016/j.ejrh.2018.02.006

Cited by 17 publications

(13 citation statements)

References 2 publications

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“…Our findings are consistent with previous studies concerning the variations of precipitation and temperature trends [3,7,23,[36][37][38][39][40][41]. However, the causes of such changes of climatic trends across the stations during the study period (1980-2016) will require another detailed investigation.…”

Section: Discussionsupporting

confidence: 92%

Analysis of the Recent Trends of Two Climate Parameters over Two Eco-Regions of Ethiopia

Gedefaw

Yan

Wang

et al. 2019

Water

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The changes in climatic variables in Ethiopia are not entirely understood. This paper investigated the recent trends of precipitation and temperature on two eco-regions of Ethiopia. This study used the observed historical meteorological data from 1980 to 2016 to analyze the trends. Trend detection was done by using the non-parametric Mann-Kendall (MK), Sen's slope estimator test, and Innovative Trend Analysis Method (ITAM). The results showed that a significant increasing trend was observed in the Gondar, Bahir Dar, Gewane, Dembi-Dolo, and Negele stations. However, a slightly decreasing trend was observed in the Sekoru, Degahabur, and Maichew stations regarding precipitation trends. As far as the trend of temperature was concerned, an increasing trend was detected in the Gondar, Bahir Dar, Gewane, Degahabur, Negele, Dembi-Dolo, and Maichew stations. However, the temperature trend in Sekoru station showed a sharp decreasing trend. The effects of precipitation and temperature changes on water resources are significant after 1998. The consistency in the precipitation and temperature trends over the two eco-regions confirms the robustness of the changes. The findings of this study will serve as a reference for climate researchers, policy and decision makers.

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Section: Discussionsupporting

confidence: 92%

Analysis of the Recent Trends of Two Climate Parameters over Two Eco-Regions of Ethiopia

Gedefaw

Yan

Wang

et al. 2019

Water

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“…The GERD project consists of a 150 m tall and 1800 m long concrete main dam along with a saddle dam that is ~ 50 m tall and 5 km in length. The saddle dam increases the reservoir's water level to ~ 640 m (Ahmed and Elsanabary 2015 ; Mulat et al 2018 ; Sharaky et al 2017 ). The Blue Nile Basin accounts for about 58–62% of the entire Nile River water supply (Liersch et al 2017 ).…”

Section: Methodsmentioning

confidence: 99%

“…In this strategy the mean yearly inflow is around 0.5% larger than 1961-2002s mean yearly inflow of around 50 Gt, where the yearly outflow rate is never below ~ 30 Gt. This work utilizes monthly water levels from Mulat et al (2018) to derive filling scenario M1. We point the reader to (Madson and Sheng 2020) for an in-depth look at how we derived the M1 filling scenario.…”

Section: Impoundment Plans Operational Scenarios and Centroidsmentioning

confidence: 99%

Coulomb stress analysis for several filling and operational scenarios at the Grand Ethiopian Renaissance Dam impoundment

Madson

Sheng

2021

Environ Earth Sci

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Increased demand for power generation coupled with changing seasonal water uncertainty has caused a worldwide increase in the construction of large hydrologic engineering structures. That said, the soon-to-be-completed Grand Ethiopian Renaissance Dam (GERD) will impound the Blue Nile River in Western Ethiopia and its reservoir will encompass ~ 1763 km2 and store ~ 67 Gt (km3) of surface water. The impoundment will undergo maximum seasonal load changes of ~ 28 to ~ 36 Gt during projected seasonal hydroelectric operations. The GERD impoundment will cause significant subsurficial stresses, and could possibly trigger seismicity in the region. This study examines Coulomb stress and hydrologic load centroid movements for several GERD impoundment and operational scenarios. The maximum subsurficial Coulomb stress applied on optimally oriented fault planes from the full impoundment is ~ 186 kPa and over 30% of our model domain incurs Coulomb stresses ≥ 10 kPa, regardless of the impoundment period length. The main driver behind Coulomb stress and load centroid motion during impoundment is the annual, accumulated daily reservoir storage change. The maximum Coulomb stresses from the highest amplitude season of five long-term operational scenarios are around 36, 33, 29, 41, and 24% of the total maximum stresses from the entire GERD impoundment. Variations in annual Coulomb stresses during modeled GERD operations are attributed to the seasonal load per unit area, and partially to the initial seasonal water level. The spatial patterns and amplitudes of these stress tensors are closely linked to both the size and timing of GERD inflow/outflow rates, and an improved understanding of the magnitude and extent of these stresses provides useful information to water managers to better understand potential reservoir triggered seismic events from several different operational and impoundment strategies.

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“…In addition, the GHA states are endowed with considerable energy resources which include hydroelectric power, natural gas, petroleum, geothermal energy, coal, tourbillon, biomass, solar, and wind energy. The Nile Basin produces more than 20 GW [66].…”

Section: Socioeconomic Featuresmentioning

confidence: 99%

Insights on Water and Climate Change in the Greater Horn of Africa: Connecting Virtual Water and Water-Energy-Food-Biodiversity-Health Nexus

et al. 2021

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Water is the key limiting factor in socioeconomic and ecological development, but it is adversely affected by climate change. The novel virtual water (VW) concept and water, energy, food, biodiversity, and human health (WEFBH) nexus approach are powerful tools to assess the sustainability of a region through the lens of climate change. Climate change-related challenges and water are complex and intertwined. This paper analyzed the significant WEFBH sectors using the multicriteria decision-making (MCDM) and analytic hierarchy process (AHP) model. The AHP model demonstrated quantitative relationships among WEFBH nexus sustainability indicators in the Greater Horn of Africa countries. Besides, the net VW imports and water footprints of major staple crops were assessed. The composite WEFBH nexus indices varied from 0.10 to 0.14. The water footprint of crops is increasing period by period. The results also revealed that most countries in the study area are facing WEFBH domains unsustainability due to weak planning or improper management strategies. The strong policy constancy among the WEFBH sector is vital for dissociating the high-water consumption from crop production, energy, environmental, and human health system. Thus, this study enhances insights into the interdependencies, interconnectedness, and interactions of sectors thereby strengthening the coordination, complementarities, and synergies among them. To attain sustainable development, we urgently call all public and private entities to value the amount of VW used in their daily activities and design better policies on the complex WEFBH nexus and future climate change.

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Evaluation of multi-storage hydropower development in the upper Blue Nile River (Ethiopia): regional perspective

Cited by 17 publications

References 2 publications

Analysis of the Recent Trends of Two Climate Parameters over Two Eco-Regions of Ethiopia

Analysis of the Recent Trends of Two Climate Parameters over Two Eco-Regions of Ethiopia

Coulomb stress analysis for several filling and operational scenarios at the Grand Ethiopian Renaissance Dam impoundment

Insights on Water and Climate Change in the Greater Horn of Africa: Connecting Virtual Water and Water-Energy-Food-Biodiversity-Health Nexus

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