there are too many bushes the weather becomes too harsh
The Nile isn't. That's why civilization took off there.
The high interior plain drops rapidly, creating waterfalls and rapids. This makes boat travel on the rivers difficult. In addition, sandbars partially block the mouths of the Limpopo and Zambezi Rivers, preventing large ships from sailing into the interior.
Difficult terrain to build on. Heavy rains and flooding. Dense trees can make it difficult for humans to get around.
The Rhine, The Danube, and the Elbe rivers
Rocky Mountains
Water.
A mountain range can make travel or transporting goods difficult due to the challenging terrain, narrow paths, and inclement weather conditions.
God Makes the Rivers to Flow was created in 1982.
The ISBN of God Makes the Rivers to Flow is 9781586380380.
It means something that makes travel difficult. Like mountains or a fast river. Or you have no legs, or you are four years old, or you have four small children. Or no money.
Hawaii has no rivers.
God Makes the Rivers to Flow has 96 pages.