A levee or embankment are two names of flood defences used to keep flood water in the river channel.
delta
Levee
The River Severn is the main river that flows into the Bristol Channel.
Three rivers that flow into the English Channel are the Thames River, Seine River, and the Rhine River. The Thames is in England, while the Seine and Rhine are in the European Continent.
The Seine River empties into the English Channel.
The River Seine is the main one. the one used most in crosswords is the River Somme
An embankment could mean a raised bank along a river as part of flood defences.
A mature river erodes its channel wider rather than deeper. The gradient of a mature river is less steep than young rivers, and the water flows more smoothly. Examples of mature rivers are the Thames, Mississippi, and Ohio rivers.
Levee
Levee
There are multiple rivers that flow in France. One such is the Rhine River and another is the Channel River.
Other rivers and streams add up into it and flow with the Mississippi River