riv·er·ine 
(rĭvə-rīn′, -rēn′)
(rĭvə-rīn′, -rēn′)adj.
1. Relating to or resembling a river.
2.
a. Located on or inhabiting the banks of a river; riparian: a riverine settlement.
b. Relating to a system of inland wetlands and deep-water habitats associated with nontidal flowing water, characterized by the absence of trees, shrubs, or emergent vegetation.
3. Operating on or equipped to operate on rivers: riverine units of the Marine Corps.