Expert Warns of Structural Risks at Grand Renaissance Dam

New study identifies concerning signs of instability at Ethiopia's massive hydroelectric project

Published on Feb. 25, 2026

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A new peer-reviewed study led by Dr. Hesham El-Askary, a professor at Chapman University, has concluded that the saddle dam of the Grand Ethiopian Renaissance Dam shows significant vulnerabilities. The study, which integrates satellite data, hydrological modeling, and advanced geospatial analysis, has identified several warning indicators including groundwater seepage, emerging leakage zones, dam deformation, increased seismicity, and potential downstream flood risks.

Why it matters

The Grand Ethiopian Renaissance Dam is one of the largest hydroelectric projects in Africa and has been the focus of regional negotiations and international attention. This study underscores the importance of enhanced international risk-monitoring frameworks, transparent data sharing, and proactive mitigation strategies to protect downstream populations and infrastructure in the event of a dam breach.

The details

The study found that an estimated 41 ± 6.2 billion cubic meters of reservoir water has seeped into surrounding groundwater during filling, based on satellite data and hydrological modeling. High-resolution satellite imagery also detected new water zones near the saddle dam, suggesting seepage or leakage pathways that require immediate structural inspection. Additionally, the research revealed up to 40 millimeters of differential settlement, a potential indicator of structural instability, and anomalous seismic activity spatially aligned with pre-existing fault systems, possibly linked to reservoir impoundment. Dam-breach simulation projects potential downstream flood depths of up to 34.7 meters, posing serious risks to communities in Sudan and Egypt.

  • The study was published on February 24, 2026.

The players

Dr. Hesham El-Askary

A professor of computational and data science at Chapman University who led the peer-reviewed study.

Grand Ethiopian Renaissance Dam

One of the largest hydroelectric projects in Africa, located on Ethiopia's Blue Nile River.

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What they’re saying

“These findings do not predict imminent failure, but they do identify measurable warning signals that require urgent international attention and transparent safety evaluation. The potential human and economic consequences of inaction are significant.”

— Dr. Hesham El-Askary, Professor of Computational and Data Science, Chapman University (Mirage News)

What’s next

The study underscores the need for enhanced international risk-monitoring frameworks, transparent data sharing, and proactive mitigation strategies to protect downstream populations and infrastructure.

The takeaway

This comprehensive assessment of the Grand Ethiopian Renaissance Dam's structural stability, groundwater dynamics, and geohazard risk highlights the critical importance of rigorous monitoring and safety evaluation for large-scale infrastructure projects, especially those with the potential to impact millions of lives downstream.