Attert (river)

Attert
The Attert in Useldange
Location
CountryBelgium, Luxembourg
Physical characteristics
Source 
  locationThiaumont, Attert
  elevation406 m (1,332 ft)
Mouth 
  location
Colmar-Berg
  coordinates
49°48′54″N 6°05′46″E / 49.814933°N 6.09612°E / 49.814933; 6.09612 (Attert mouth)
Length38 km (24 mi)
Basin size290 km2 (110 sq mi)
Basin features
ProgressionAlzetteSauerMoselleRhineNorth Sea

The Attert (French pronunciation: [atɛʁt], German pronunciation: [ˈatɐt]; Luxembourgish: Atert) is a river in western Europe that flows through Belgium and Luxembourg. Approximately 38 kilometres long, it originates near Nobressart in Belgium, crosses the Luxembourg border, and ultimately joins the river Alzette at Colmar-Berg. The Attert basin covers around 290 km2 and features diverse landscapes influenced by regional geology, resulting in seasonal variations in water flow and sediment transport. Since 2001, Belgium and Luxembourg have jointly managed the river through ecological initiatives aimed at preserving water quality, protecting habitats, and supporting aquatic wildlife.