This river is known for the variation in flow depending on the time of the year and the meteorological conditions.

Its name is derived from the Latin word flamicellu which means small river.

[citation needed] The source of the river is in Cabdella and it flows south passing the town of La Pobleta de Bellvei and the village of La Plana de Mont-ros.

A few kilometres later it passes La Pobla de Segur and joins the river of Noguera Pallaresa just above the Sant Antoni reservoir.

Also the 95% of the common trout that live in this river have an average movement of fifty meters.