Rapids

What are the rock-filled rapids that are found in nubia along the nile river called?

Questions about nile another one is (Under what type of economic system does the U.S. operate?)

Public Comments

1. The cataracts, there are six of them, but only some of the six cataracts feature rock-filled rapids. http://en.wikipedia.org/wiki/Cataract_Nile And the US economic system is capitalist.
2. Just north of Khartoum the Blue Nile and the White Nile meet their final major tributary, the Atbara which form the Nile River; it then plunges into a canyon and runs through a series of six rapids called the "cataracts". The second rapid in Nubia was called, "The Great Cataract", but is now covered by Lake Nasser. With the construction of the Aswan High dam the Nile has gradually changed its course. As to your second question: I'm not quite sure what you are asking, but I'll make a stab at it and say the World Economic Forum (WEF)