Ethiopia's dam is completely made of concrete, which decreases its safety factors and raises the potential for its collapse, a water resources expert has said.

The Nile River is an international river and is registered at the World Bank, therefore Ethiopia has no right to build dams on the river with Egypt's and Sudan's consent, a water resources professor at Cairo University said.

Ethiopia wants to assert its right to build dams along the Blue Nile without referring to Egypt and Sudan, professor Nader Nour al-Din told the Kuwait News Agency.

Unlike Egypt's earth-rock dam, Ethiopia's concrete dam will annihilate the Sudanese city of Khartoum in case of its collapse. 

A collapse will bury all cities north of Khartoum under nine metres of water, Nour al-Din said.

The collapse of the Ethipian dam may cause Egypt's dam to collapse as well if water levels the lake behind the dam are high.

If our dam collapses, all Egyptian governorates north of it until the Giza governorate will be submerged.

This dam must not be built, Nour al-Din said.

Nour al-Din warned against the outcome of Ethiopia's dam in case it collapses, adding that Ethiopia will not be affected but that the results will be catastrophic for Egypt and Sudan.