1. The geographical area where all surface water converges to one location is called its . 2. A delta forms at the of a river, where the velocity of the water flow decreases and deposition is highest.
3. The volume of water flowing past a certain point in a given amount of time is a river's .
4. The of a river have a steep gradient, high channel roughness, and low water volume.
5. A stream with a low to moderate gradient, carrying most of its load in suspension, should be characterized by many curves and bends called .
6. A river with a well-developed has a flat low-lying channel and experiences flooding during periods of high discharge.