The embankments on a river bank that help to contain and direct the water are called different things, depending on where you live.
They can be called levées, dikes, stopbanks, floodbanks or sometimes just embankments.
delta
The "Main Channel".
Levee
A levee is a buildup of sediment deposited along the channel of a river that keeps the river inside its banks. It acts as a natural barrier that prevents the river from overflowing and causing flooding in surrounding areas.
Levees. They are natural or man-made raised embankments along a river or other body of water that help prevent flooding by containing the flow within the main channel.
A levee or embankment are two names of flood defences used to keep flood water in the river channel.
The River Channel is just before the the river meets the mouth or sea.
banks
Long ridges of sediments alongside the channel of a river are called levees. They are created by the deposits which are made when a river overflows its banks.
When sediment is deposited outside the banks of a river, it forms landforms known as levees. Levees are elevated embankments that help to prevent flooding by containing the river within its channel. They are created through the accumulation of sediments carried by the river during times of high flow.
The large body of water that flows in between England and France is called the English channel. It is not a river.
Kosi River changed course due to heavy rainfall and flooding, causing erosion and deposition of sediment. This led to the river channel shifting its path, a process known as avulsion. Human activities, such as deforestation and construction of embankments, have also played a role in altering the river's course.