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yes it does. the hydraulic radius increases downstream which decreases friction. also the river sides and bed are smoother due to faster erosion which allows the river to flow faster. There are unlikely to be large obstuructions (such as boulders) in the river so the water has a clear path.

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Does gravity cause rivers the flow?

No, gravity does not directly cause rivers to flow. Rivers flow due to the force of gravity pulling the water downstream. The elevation gradient along the river channel allows the water to move from higher to lower elevations, creating the flow of the river.


Why does water flow in rivers and streams?

Water flows in rivers and streams due to the force of gravity pulling it downhill. The water follows the path of least resistance, moving from higher elevations to lower elevations, creating the flow that we see in rivers and streams.


What can refer to the tHickness of a fluid and how fast it flow?

The viscosity of a fluid is a measure of its thickness or resistance to flow. It determines how fast a fluid can flow, with higher viscosity fluids flowing more slowly than lower viscosity fluids.


What is subaqueous flow?

Subaqueous flow is the movement of water beneath the Earth's surface, typically in the form of groundwater. This flow is important for maintaining water levels in rivers, lakes, and oceans, as well as providing a source of water for plant roots and groundwater recharge.


What is significance of hydraulic radius?

The hydraulic radius is used to characterize flow in open channels like rivers and pipes by measuring the ratio of the cross-sectional area of flow to the wetted perimeter. It helps in quantifying the efficiency of flow conveyance, determining the resistance to flow, and calculating flow velocity. A larger hydraulic radius indicates more efficient flow, while a smaller hydraulic radius indicates higher resistance to flow.