What is an embankment (manmade levee)
High banks built on/near river banks
An advantage of embankments (man made levees)
They can have walkways or roads on top of them increasing the amenity facilities in the area-multi purpose.
A disadvantage of embankments (manmade levees)
Embankments increase channel capacity, so if they fail a large volume of water is released suddenly causing even more damage.