Heading downstream, the river fares through : Levels were recorded from 1965 to 2008 at Mayres,[2] with a discharge of 1.18 cubic metres per second (42 cu ft/s), 10 kilometres (6 mi) from its confluence with la Dore.

High waters are in winter and spring especially, with average monthly scores of 1.53 to 1.71 cubic metres per second (54 to 60 cu ft/s), from December to May (peak in April).

Àt low water, the rate can drop to 0.033 cubic metres per second (1.2 cu ft/s), equivalent to 33 litres per second (8.7 USgal/s), after a five-year dry period.

Lush in trout, a fair part of the river is included in the Natura 2000 programme, a small colony of Freshwater pearl mussel still present.

Though it suffers little from industrial, domestic or agricultural pollution, the resinous reforestation of its banks has led to acidification of its waters and spawn clogging.