The Rhine divides at Lobith on the Dutch-German border. Two branches continue the route westwards. The southern section is made up of a river which changes its name from Waal to Merwede, Noord and New Meuse. Most of the water in the Rhine follows this route. That means that this section determines the length of the Rhine.
Many of the river branches in this section are connected to the Meuse, which is why it is also called the Rhine-Meuse delta.