Nile dam dispute poses a thorny challenge for Ethiopia and Egypt

DUBAI: When Egyptian, Ethiopian and Sudanese officials meet to resolve their differences on the Grand Ethiopian Renaissance Dam (GERD) that Addis Ababa is building on the Blue Nile, they instantly run into many thorny issues.

These disputes run deeper than technical matters and the sharing of water, experts and analysts say. Because they are also legal, historical and trust-related, a tripartite agreement has proved elusive. An eventual deal could take longer because major differences persist, mainly between Ethiopia and Egypt.