Nahaliel is described as an angel of rivers in Yoga Vidya’s contemporary German spiritual account. The page interprets the name through the divine force experienced in flowing water.
River symbolism
Yoga Vidya connects Nahaliel with the force of rivers collectively. It describes sitting beside a river, hearing its water and seeking an experience of its spiritual presence. Nahaliel is the name it gives to that divine force and the accompanying experience.
Source
Yoga Vidya, “Nahaliel,” contemporary German spiritual interpretation.