Answer
A longitudinal profile is a graphical representation of a river or stream's elevation along its course from its source (headwaters) to its mouth, usually plotted as a line graph. It shows how the elevation changes along the river's path, including any changes in slope or gradient. The profile provides valuable information about the river's behavior, including where it flows more rapidly or slowly, where it may encounter waterfalls or rapids, and how it may interact with the surrounding landscape.
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