What part of a transboundary water basin is shared? The water, the river, or other natural resources of the river?

The water basin includes other resources besides the river and which are connected to it. Some of these are divisible by nature, such as the channel for example, where each State exercises limited sovereignty over the portion of the channel passing through its territory. The water flowing in the basin itself is a non-divisible natural resource. States exercise joint ownership over this resource which leads to shared sovereignty. The same applies to the living resources that inhabit the waters and which have independent mobility.