The Egyptian interim government of President Adly Mansou has warned Ethiopia

The Egyptian interim government of President Adly Mansou has warned Ethiopia over 

plans to build a giant dam on the river Nile, saying it will reduce water flows vital for its 84 million people.

Addressing the press at the media center in Kampala on Friday, the country’s director of Nile Basin countries affairs, Mohamed El-Hamza, said the building of $4.7bn dam near its border with Sudan violates the 1929 pact which entitled Egypt to 55.5bn cubic metres a year of the Nile's flow and the consequences would be dire for the country.

“Ethiopia should not go ahead with its plans of building this dam. The 1929 pact clearly entitled us to 55.5bn cubic metres a year of the Nile's flow of around 84bn cubic metres. Our population will suffer as a result of this dam because they almost use all the water available to the Nile,” he said.

Ethiopia and five other upstream Nile states, such as Kenya and Uganda, say Egypt's claims are outdated and have signed a deal effectively stripping Cairo of its veto based on colonial-era treaties over dam projects on the river.

President Yoweri Museveni recently advised Egypt to handle the dispute over use of the waters of River Nile with caution.

"It is advisable that those chauvinistic statements coming out of Egypt are restrained and through the Nile Valley Organization rational (not emotional and informed statements) discussions take place," Museveni said while addressing the nation and parliament last month.

He added: "No African wants to hurt Egypt; however, Egypt cannot continue to hurt black Africa and the countries of the tropics of Africa."

He said the work Ethiopia is undertaking by building dams is crucial to regional economy, and should instead be encouraged by Egypt. "The biggest threat to the Nile is continued under-development in the tropics i.e. lack of electricity and lack of industrialization."

Museveni advised that industrialization is what is needed in the region so that people stop using wood fuel and shift from agriculture to industry and services.

Ethiopia's parliament last month ratified a controversial treaty ensuring its access to Nile water resources, amid bitter arguments with Egypt trigged by an Ethiopian dam project.

The deal replaces a colonial-era agreement that granted Egypt and Sudan the majority of water rights and allows upstream countries to implement irrigation and hydropower projects without first seeking Egypt's approval.