From Wiktionary, the free dictionary
From fluvial + -ity.
fluviality (uncountable)
- The quality of being fluvial.
2017, Nathaniel Mackey, Late Arcade[1], New York, NY: New Directions Publishing, →ISBN, →OCLC, page 22:Ambient accompaniment, water maintained pedalpoint armature, fluviality, surge and subsidence, light oratorical wax and recess.