The steeper the slope, what happens to the stream velocity?

The correct answer is that the stream velocity increases as the slope becomes steeper. This phenomenon can be explained by the dynamics of fluid flow in relation to gravity and gradient. When a stream has a steeper slope, gravity exerts a stronger force on the water moving down that slope, which accelerates the flow. As the gradient increases, the energy imparted to the water also increases, resulting in higher velocities.

Additionally, a steeper slope decreases the contact area between the water and the streambed, reducing friction and allowing the water to flow more swiftly. This relationship between slope and velocity is fundamental in hydrology and is particularly important when analyzing river behavior during storms or planning for flood prevention. Understanding this concept is essential for predicting changes in stream patterns and behaviors in various environmental contexts.