Match the words in the left column to the appropriate blanks in the sentences on the right. View Available Hint(s) ResetHelp 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.