A levee on flood
A)increases the water surface elevation of the river at flood
B)decreases the surface slope of the stream above the leveed portion
C)increases the velocity and scouring action through leveed section
D)all of the above

Question

Quizplus · Accepted Answer

Levees are designed to protect land from flooding by containing the flow within a confined area, which can lead to an increase in the water surface elevation of the river during flood conditions. This confinement can also decrease the surface slope of the stream above the leveed portion due to the backwater effect. Additionally, by narrowing the river's channel, levees can increase the velocity of the water flow through the leveed section, which can lead to increased scouring action.

A Levee on Flood