Final answer:
The carrying capacity of a stream is influenced by the climate. In headwater streams, faster-moving water and short distance from the source result in minimal sediment accumulation. As the river or stream flows away from the source, the width of the channel gradually widens, the current slows, and sedimentation increases.
Step-by-step explanation:
Streams carrying capacity is influenced by the climate. In headwater streams, where the water is clear, faster-moving water and short distance from the source result in minimal sediment accumulation. This is because the swift current inhibits the growth of phytoplankton and the water is cooler due to shading from tree cover.
As the river or stream flows away from the source, the width of the channel gradually widens, the current slows, and sedimentation increases. The slow-moving water allows for phytoplankton suspension and the water becomes murkier.