Of or relating to or happening in a river. Fluvial landforms are those landforms produced by the action of running water in the terrestrial environment, and fluvial geomorphic processes are those natural processes that produce, maintain and change fluvial landforms.
The word fluvial is used in geography and earth science to refer to all topics related to flowing water. Fluvial usually refers to rivers, streams and sometimes through flow, overland flow and percolation. Fluvial may also refer to glaciers and oceans, though these are usually known as glacial, oceanic and coastal.