ancient Egypt was built around the Nile River. The river served as an artery of transportation wherever possible. However, at a number of places, rapids or cataracts prevented river traffic. In those places boats had to be taken from the river and moved around the cataracts and the relaunched on the other side. They could also be unloaded and then different boats reloaded beyond the cataract. The ancient Egyptians did not have the technology to develop locks.
a cataract is steep rapids formed by cliffs in a river.
it is a large waterfall
A cataract is a waterfall.
Since the first cataract is at Aswan, the area north of it is Egypt.
A cataract is like a waterfall.
It's a large waterfall.
Aswan
there are 6 cataracts in ancient Egypt
A large waterfall that pervents boats from passing
Near the second cataract
Nubia has a higher elevation and less desert area than Egypt.
a cataract is steep rapids formed by cliffs in a river.
Near the second cataract
a cataract is steep rapids formed by cliffs in a river.