Final answer:
Flood profiles are developed by plotting the elevations at the cross sections along a river and connecting these points to understand the river's behavior during flooding.
Step-by-step explanation:
Flood profiles are developed by plotting the flood elevations at the cross sections and connecting the plotted points. The process involves marking different features associated with a river system, such as cut bank, point bar, levee, oxbow lake, thalweg, flood plain, and terrace. These profiles help in understanding the behavior of a river during flood events and also provide critical information for flood management and planning. Working with these geographical tools requires a clear understanding of topographic and geological features.