a cross sectional view of a stream from its source, or head waters, to its mouth the point downstream where the river empties into another body of water.
nickpoint
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I would say the waterfall and the rapids are the most prominent features of a narrow V - Shaped valley where the stream profile drops rapidly.
The cross profile of a stream refers to the shape and characteristics of its channel at a specific point, which can influence how water flows and interacts with the surrounding environment. Changes in the cross profile, such as erosion or sediment deposition, can alter water velocity, depth, and flow patterns. These modifications can affect aquatic habitats, sediment transport, and the stream's ability to respond to flooding or drought conditions. Ultimately, a changing cross profile can lead to shifts in the stream's ecology and hydrology over time.
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Some prominent features of a narrow V-shaped valley with a stream profile that drops rapidly include steep, rocky walls, minimal vegetation due to the harsh environment, a high-gradient stream flowing through the valley, and the potential for waterfalls and cascades as the stream descends quickly.
Hi
Incised meanders: Entrenched meanders that indicate a stream has downcut into its bed, often resulting in a deep, narrow channel. Knickpoints: Sudden changes in slope along a stream profile that indicate a shift in base level and rejuvenation of the stream system.
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A section of stream from one bank to the other is commonly referred to as a "cross-section" of the stream. This term is used in hydrology and geology to describe the lateral profile of the stream, illustrating its depth, width, and shape at a specific point. It helps in understanding flow dynamics and sediment transport within the stream.