Final answer:
A hydraulic study uses the hydrology, cross-section information, and stream characteristics to determine the flood depth.
Step-by-step explanation:
A hydraulic study uses the hydrology, cross-section information, and stream characteristics to determine the flood depth (c).
Flow rate, which determines the velocity of water, is related to both the average velocity (speed) and the cross-sectional area of the river, pipe, or conduit. The larger the area, the greater the flow rate, and subsequently, the greater the depth of the flood.
For example, if a river has a larger cross-sectional area and high velocity, it will carry more water and cause a deeper flood than a smaller river with lower velocity.