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Seille
The Seille at Vic-sur-Seille
Origin	Azoudange, Moselle
Mouth	Moselle River
Basin countries	France
Length	135 km
Avg. discharge	10.5 m³/s
Basin area	1348 km²

The Seille (IPA: [sɛj]) is a river in the French région of Lorraine, right tributary of the Moselle River. It is also known as the Seille lorraine or the Grande Seille ("large Seille"), to distinguish it from another Seille, a small tributary of the Saône.

It originates near Azoudange, in the département of Moselle. Leaving the Lindre lake, it skirts the town of Dieuze, and traverses Vic-sur-Seille and Nomeny, before flowing into the Moselle at Metz. It is 135 km long, and has a basin area of 1348 km². Most of its length is in the département of Moselle, except for the part between Aulnois-sur-Seille and Cheminot, which is in Meurthe-et-Moselle. The Seille also serves as the border between Moselle and Meurthe-et-Moselle from Chambrey to Aulnois-sur-Seille.

The Old Seille at Marsal. This secondary branch was the principal bed before canalization efforts in the 18^th & 19^th centuries.

Originating in the Pond region, the Seille then crosses Saulnois, a region in the South of Moselle. This section of the river is part of the Parc naturel régional de Lorraine ("Regional Natural Park of Lorraine"). The river then flows into a large valley, the ground of which is composed mainly of marl and clay. Since the Middle Ages, there has been much work performed on the Seille, in part to straighten it (to render it navigable), to drain the nearby swamps, and to limit flooding of adjacent low-lying areas.

Its linear course and the treelessness of its banks makes it of little interest to the landscape, and today the erosion of its banks poses problems. Despite this, the valley is of biological interest: salt water resurgences have led to the presence of various plant species that are usually confined to coast lines, including glasswort, aster tripolium, and sea-spurreys.

As of 2004, work is being done on the river: the banks of the river are being reforested, and an oxygenation system is being installed.

The Seille has a number of tributaries, the most important of which are:

• the Spin and the Verbach, in Dieuze (right bank)
• the ruisseau de Videlange (lit. "brook of Videlange"), near Mulcey (right bank)
• the Nard, in Marsal (left bank)
• the Petite Seille (lit. "Small Seille"), in Salonnes (right bank)
• the Loutre Noire (lit. "Black Otter"), in Moncel-sur-Seille (left bank)

Downstream, the Seille is much less straight, following a contorted path along the border of the département of Moselle.

This section of the river has comparatively few tributaries:

• the Osson, at Ajoncourt
• the ruisseau Saint-Jean (lit. "St. John brook"), in Létricourt (right bank)
• the ruisseau Saint-Pierre (lit. "St. Peter brook")

Finally, in Metz, after passing the Porte des Allemands (a 13^th century castle, lit. "Gate of the Germans"), it flows into the right bank of the Moselle River.

The river is classified as "Category II" (categories are based on types of fish), and is the habitat for a very large variety of fish. It is also home to a variety of other animals, such as otters, herons, and caterpillars. The Seille suffers from eutrophication.

Numerous towns and villages incorporate the name of the river into theirs. Some examples include: Aboncourt-sur-Seille, Aulnois-sur-Seille, Bey-sur-Seille, Brin-sur-Seille, Coin-sur-Seille, Haraucourt-sur-Seille, Mailly-sur-Seille, Malaucourt-sur-Seille, Moncel-sur-Seille, Morville-sur-Seille, Port-sur-Seille, and Vic-sur-Seille. The suffix "sur-Seille" means "on the Seille" in French, and the practice is analogous to the English place names that incorporate river names, such as Newcastle-upon-Tyne.

• The French une seille is a common noun, and can be translated into English as "a bucket".

• Photos and History of the Seille

Tributaries of the Moselle River

From the left: Madon | Terrouin | Esch | Rupt de Mad | Orne | Fensch | Gander | Syre | Sauer | Kyll | Salm | Lieser | Alf | Endert | Brohlbach | Elz

From the right: Moselotte | Vologne | Meurthe | Seille | Saar | Olewiger Bach | Avelsbach | Ruwer | Feller Bach | Dhron | Ahringsbach | Kautenbach | Lützbach | Flaumbach | Altlayer Bach | Baybach | Ehrbach