The Aa (; ) is a river in northern

France France, officially the French Republic, is a country located primarily in Western Europe. Overseas France, Its overseas regions and territories include French Guiana in South America, Saint Pierre and Miquelon in the Atlantic Ocean#North Atlan ...

that is 93 km (58 miles) long. Originating near the village of Bourthes and emptying into the

North Sea The North Sea lies between Great Britain, Denmark, Norway, Germany, the Netherlands, Belgium, and France. A sea on the European continental shelf, it connects to the Atlantic Ocean through the English Channel in the south and the Norwegian Se ...

near

Gravelines Gravelines ( , ; ) is a Communes of France, commune in the Nord (French department), Nord departments of France, department in Northern France. It lies at the mouth of the river Aa (France), Aa southwest of Dunkirk, France, Dunkirk. It was form ...

, the Aa is located near the north-eastern limit of the

English Channel The English Channel, also known as the Channel, is an arm of the Atlantic Ocean that separates Southern England from northern France. It links to the southern part of the North Sea by the Strait of Dover at its northeastern end. It is the busi ...

. The Aa has been canalized for most of its length and forms much of the border between the regions of

Pas-de-Calais The Pas-de-Calais (, ' strait of Calais'; ; ) is a department in northern France named after the French designation of the Strait of Dover, which it borders. It has the most communes of all the departments of France, with 890, and is the ...

and

Nord Nord, a word meaning "north" in several European languages, may refer to: Acronyms * National Organization for Rare Disorders, an American nonprofit organization * New Orleans Recreation Department, New Orleans, Louisiana, US Film and televisi ...

Hydronymy

The word "Aa" in

Old Dutch In linguistics, Old Dutch ( Modern Dutch: ') or Old Low Franconian (Modern Dutch: ') is the set of dialects that evolved from Frankish spoken in the Low Countries during the Early Middle Ages, from around the 6th Page 55: "''Uit de zesde eeu ...

means "water" (it still retains the name in modern Dutch and local

West Flemish West Flemish (''West-Vlams'' or ''West-Vloams'' or ''Vlaemsch'' (in French Flanders), , ) is a collection of Low Franconian varieties spoken in western Belgium and the neighbouring areas of France and the Netherlands. West Flemish is spoken by ...

), and can be traced via

Proto-Germanic Proto-Germanic (abbreviated PGmc; also called Common Germanic) is the linguistic reconstruction, reconstructed proto-language of the Germanic languages, Germanic branch of the Indo-European languages. Proto-Germanic eventually developed from ...

back to its original

Indo-European The Indo-European languages are a language family native to the northern Indian subcontinent, most of Europe, and the Iranian plateau with additional native branches found in regions such as Sri Lanka, the Maldives, parts of Central Asia (e. ...

form. The river is very well-known to

crossword A crossword (or crossword puzzle) is a word game consisting of a grid of black and white squares, into which solvers enter words or phrases ("entries") crossing each other horizontally ("across") and vertically ("down") according to a set of cl ...

enthusiasts ("the first river in France"). The river is known in

Modern Latin Neo-LatinSidwell, Keith ''Classical Latin-Medieval Latin-Neo Latin'' in ; others, throughout. (also known as New Latin and Modern Latin) is the style of written Latin used in original literary, scholarly, and scientific works, first in Italy d ...

as ''Agnio'', but has been recorded in many forms in

Medieval Latin Medieval Latin was the form of Literary Latin used in Roman Catholic Church, Roman Catholic Western Europe during the Middle Ages. It was also the administrative language in the former Western Roman Empire, Roman Provinces of Mauretania, Numidi ...

, starting with ''Agnona'' in 648 AD. In local Picard dialects, the Aa is traditionally called the ''Abbe''.

Geography

The river's geography is divided into two parts. The first segment ranges from the river's source is in the Artois HillsDubois, Claude, ed. (1960). "Aa" a ''Grand Larousse Encyclopédique'' (in French). I: A-Bauer (First ed.). Paris, France: Librairie Larousse. p. 3. to

Saint-Omer Saint-Omer (; ; Picard: ''Saint-Onmé'') is a commune and sub-prefecture of the Pas-de-Calais department in France. It is west-northwest of Lille on the railway to Calais, and is located in the Artois province. The town is named after Sa ...

to form a small

chalk stream Chalk streams are rivers that rise from springs in landscapes with chalk bedrock. Since chalk is permeable, water easily percolates through the ground to the water table and chalk streams therefore receive little surface runoff. As a result, th ...

, similar to the

Somme __NOTOC__ Somme or The Somme may refer to: Places *Somme (department), a department of France * Somme, Queensland, Australia * Canal de la Somme, a canal in France *Somme (river), a river in France Arts, entertainment, and media * ''Somme'' (book), ...

. This section of the river drains the Artois plateau and is long. The river's second part spans from Saint-Omer to its

mouth A mouth also referred to as the oral is the body orifice through which many animals ingest food and animal communication#Auditory, vocalize. The body cavity immediately behind the mouth opening, known as the oral cavity (or in Latin), is also t ...

, a distance of approximately . As a navigable waterway, this section connects the Canal de Calais to

Calais Calais ( , , traditionally , ) is a French port city in the Pas-de-Calais department, of which it is a subprefecture. Calais is the largest city in Pas-de-Calais. The population of the city proper is 67,544; that of the urban area is 144,6 ...

and the Canal de Bourbourg leading to Dunkirk. The section of the river from Saint-Omer to the junction with the main Dunkirk-Scheldt waterway and the Canal de Neuffossé are not currently navigable.

History

Its name originates from the Old High German word ''aha'', which means water. The word also shares roots with the Latin word ''aqua''. Saint-Omer formerly lay at the head of its

estuary An estuary is a partially enclosed coastal body of brackish water with one or more rivers or streams flowing into it, and with a free connection to the open sea. Estuaries form a transition zone between river environments and maritime enviro ...

while seaward, Calais lay on its western margin and

Bergues Bergues (; ; ) is a Communes of France, commune in the Nord (French department), Nord Departments of France, department in northern France. It is situated to the south of Dunkirk and from the Belgium, Belgian border. Locally it is referred to ...

, now inland from

Dunkirk Dunkirk ( ; ; ; Picard language, Picard: ''Dunkèke''; ; or ) is a major port city in the Departments of France, department of Nord (French department), Nord in northern France. It lies from the Belgium, Belgian border. It has the third-larg ...

, on its eastern one. By the time of the

Viking Vikings were seafaring people originally from Scandinavia (present-day Denmark, Norway, and Sweden), who from the late 8th to the late 11th centuries raided, pirated, traded, and settled throughout parts of Europe.Roesdahl, pp. 9� ...

settlements on this coast, Dunkirk was developing on the

dune A dune is a landform composed of wind- or water-driven sand. It typically takes the form of a mound, ridge, or hill. An area with dunes is called a dune system or a dune complex. A large dune complex is called a dune field, while broad, flat ...

s, offshore across the

estuarine An estuary is a partially enclosed coastal body of brackish water with one or more rivers or streams flowing into it, and with a free connection to the open sea. Estuaries form a transition zone between river environments and maritime environm ...

marsh from Bergues.

was the port at the seaward end of the river after the area of the estuary was reclaimed. The dates of these events are imprecise but the modern pattern was firmly established by 1588, the time of the

Spanish Armada The Spanish Armada (often known as Invincible Armada, or the Enterprise of England, ) was a Spanish fleet that sailed from Lisbon in late May 1588, commanded by Alonso de Guzmán, Duke of Medina Sidonia, an aristocrat without previous naval ...

when an approximation to the modern course of the lowland river formed the boundary between the

Spanish Netherlands The Spanish Netherlands (; ; ; ) (historically in Spanish: , the name "Flanders" was used as a '' pars pro toto'') was the Habsburg Netherlands ruled by the Spanish branch of the Habsburgs from 1556 to 1714. They were a collection of States of t ...

and

. The river suffers significant problems from industrial discharge and siltation, which made the length of the Aa from Saint-Omer to the junction with the Dunkirk-Escaut waterway unnavigable since the 1970s.

References

External links

*
Aa river guide
- Navigation on the canal, including

as an entry port into the French waterways network. {{Authority control Rivers of France Rivers of the Pas-de-Calais Rivers of Nord (French department) Rivers of Hauts-de-France 0Aa