Bidasoa

Coordinates: 43°22′22″N 1°47′31″W / 43.37278°N 1.79194°W / 43.37278; -1.79194
Source: Wikipedia, the free encyclopedia.
Bidasoa
The Bidasoa in Spain
Location
Countries
Physical characteristics
Source 
 • locationWestern Pyrenees
Mouth 
 • location
Bay of Biscay
 • coordinates
43°22′22″N 1°47′31″W / 43.37278°N 1.79194°W / 43.37278; -1.79194
Length66 km (41 mi)[1]
Basin size705 km2 (272 sq mi)[1]
Discharge 
 • average24.7 m3/s (870 cu ft/s)

The Bidasoa (Spanish: [biðaˈsoa]; French: Bidassoa,[2] pronounced [bidasɔa]) is a river in the Basque Country of northern Spain and southern France that runs largely south to north. Named as such downstream of the village of Oronoz-Mugairi (municipality of Baztan) in the province of Navarre, the river actually results from the merger of several streams near the village Erratzu, with the stream Baztan that rises at the north-eastern side of the mount Autza (1,306 m) being considered the source of the Bidasoa. It joins the Cantabrian Sea (Bay of Biscay) between the towns of Hendaye and Hondarribia.

airport, Txingudi, the SNCF facilities in Hendaye, Irun
in the distance and the Santiago Bridge spanning the borderline

The river is best known for establishing the borderline at its lower tract.

Way of St. James
). At this stage of the river, urban landscape prevails (built-up area).

Before pouring its waters into the ocean, it forms a bay called Txingudi located between these towns and

San Sebastian Airport serving domestic flights[3]
and currently mired in controversy over its lengthening and upgrading scheme.

Pronunciation and etymology

The river comprises an area of linguistic contact, so it is pronounced differently depending on the language, namely [biˈdas̺oa] in Basque, [biðaˈsoa] in Spanish, and [bidasoa] in French. Linguistic and historic research point to the name stemming from Latin phrase "Via ad Oiassonem" (later corrupting into Basque "Bidasoa") on account of the road that linked at Roman times Basque town Pompaelo with Oiasso, which may have run along the river.

Course of the river and tributaries

The Bidasoa at Elizondo

The Bidasoa flows through much of its 66 km (41 mi) length over

Basque provinces of Gipuzkoa and Labourd. In line with the distribution of the river's length, the bulk of its watershed's area lies on Navarre
(684 km2 or 264 sq mi). The basin holds 105 permanent streams and rivers that number 497 km (309 mi), the region being drenched in rains regularly. The Navarrese side of the basin (rural landscape) is inhabited by 22,000 inhabitants. 70% of its population have the sewage treated before spilling to the river.

But for the first 15-odd kilometres, the river clings to the north to south disposition of other neighbouring rivers of Gipuzkoa joining the

Biriatu by the AP-8 (motorway). Next comes the quarter Behobia
and the major towns on the shores of the estuary.

The main tributaries of the Bidasoa are the minor rivers Zeberia (length 10.80 km (6.71 mi)), Ezkurra (20.90 km (12.99 mi)), Latsa (11.10 km (6.90 mi)) and Endara (9.90 km (6.15 mi)). Additionally, further small rivers and streams feed the Bidasoa all along.

Fishing and environmental challenges

Aerial view of the Bidasoa's mouth and Txingudi
Cohaya on the Bidassoa (in Spain) by Edward Hawke Locker in 1824, published in the work Views in Spain
Fontarrabie, in 1843 by Eugène de Malbos

The Navarrese tract of the river is a preferred destination for fishing enthusiasts, the river being home to several native fish species, namely

Chondrostoma miegii
, has been introduced in the last 30–40 years on the lower tract of the Bidasoa, thereafter extending gradually upstream.

As a result, overfishing has become a major problem for the river's fauna, with special pressure put on salmon migrating upstream to spawn. They do not make it to their goal and die before spawning, either falling prey to fishers' bait or an inability to overcome hydroelectric power stations (128 over all the course) and the 114 related dams, since 63% of them prevent migratory fish from achieving their purpose. Schemes by the Regional Government of Navarre are underway with a view to handling the issue.

See also

Footnotes

  1. ^ a b "Ríos: Río Bidasoa". Inst. Geográfico Vasco Andres Urdaneta Euskal Geografi Elkargoa. Retrieved 20 October 2013.
  2. Sandre. "Fiche cours d'eau - La Bidassoa (S6--0250)"
    .
  3. ^ a b c d e "Comarca del Bajo Bidasoa (Bidasoa Beherea)". Inst. Geográfico Vasco Andres Urdaneta Euskal Geografi Elkargoa. Retrieved 20 October 2013.
  4. ^ "RED DE SEGUIMIENTO DEL ESTADO ECOLÓGICO DE LOS RÍOS DE LA COMUNIDAD AUTÓNOMA DEL PAÍS VASCO: Tomo 15, Unidad Hidrológica del Bidasoa" (PDF). Ingurumena. EJ-GV. 2005. Retrieved 20 October 2013.

References

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