Sentence:  Among the main tributaries of the French Rhône River (Arve, Guiers, Ain, Saône, Isère, Eyrieux, Drôme, Ardeche, Durance, Gard), Berahou (1993) considered the lower Ain as one of the most <WSD>lotic</WSD>. 
Meaning of the word marked with <WSD> tags:  Characterised by flowing water; swiftly flowing; concerned with flowing rivers, streams, etc.