What is a streams gradient?

A stream's gradient, also known as its slope, refers to the change in elevation of the stream's bed over a certain distance, typically expressed in feet per mile or meters per kilometer. It indicates how steeply the stream descends from its source to its mouth. A higher gradient usually results in faster water flow and more erosive power, while a lower gradient tends to create slower-moving water and more sediment deposition. Understanding a stream's gradient is essential for evaluating its hydrology, ecology, and potential for flooding.