Geography of Andorra

Andorra is a small, landlocked country in southwestern Europe, located in the eastern Pyrenees mountain range and bordered by Spain and France. With an area of 468 km², it is the sixth smallest country in Europe and also the largest of the European microstates.

Andorra consists predominantly of rugged mountains, the highest being the Coma Pedrosa at Template:Convert, and the average elevation of Andorra is Template:Convert.<ref>Atlas of Andorra (1991), Andorran Government. Template:Oclc. Template:In lang</ref> These are dissected by three narrow valleys in a Y shape that combine into one as the main stream, the Gran Valira river, leaves the country for Spain (at Andorra's lowest point of Template:Convert).

Andorra's climate is similar to that of its neighbours' temperate climates, but its higher elevation means there is, on average, more snow in winter, lower humidity, and it is slightly cooler in summer. There are, on average, 300 days per year of sunshine.

Phytogeographically, Andorra belongs to the Atlantic European province of the Circumboreal Region within the Boreal Kingdom. According to the WWF, the territory of Andorra belongs to the ecoregion of Pyrenees conifer and mixed forests.

Landslides and avalanches are the main natural hazards. There are frequent earthquakes below Richter magnitude 2. There is no historical record of any damaging earthquakes in Andorra, but the Andorran government has studied the possibility of a future one.<ref name="sost1">Conseqüències per a Andorra d'un possible terratrèmol Template:Webarchive, Programa dactivitats tardor 08, el Centre Andorra Sostenible, Govern d'Andorra, p.16. Template:In lang</ref>

In Andorra forest cover is around 34% of the total land area, equivalent to 16,000 hectares (ha) of forest in 2020, which was unchanged from 1990. In 2020, naturally regenerating forest covered 16,000 hectares (ha) and planted forest covered 0 hectares (ha). Of the naturally regenerating forest 0% was reported to be primary forest (consisting of native tree species with no clearly visible indications of human activity) and around 0% of the forest area was found within protected areas.<ref>Template:Cite book</ref><ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>

MountainsEdit

File:Andorra la Vella view2.jpg

View of Andorra la Vella with mountains

All of Andorra is mountainous, and in total, there are 65 mountain peaks.<ref name="dss">Andorra – The Principality in Figures (2007), p.16, Andorra Turisme / Department of Studies and Statistics</ref>

The highest mountain is Coma Pedrosa, which rises to Template:Convert in the northwest of Andorra near the French and Spanish borders.

Along the border with France, from west to east, the highest mountains are Pic de Médécourbe (Template:Convert), which is the western tripoint international boundary of Andorra, France, and Spain, Pic de Cataperdis (Template:Convert) and Pic de Tristaina (Template:Convert), Pic de Font Blanca (Template:Convert) in the northwest; Pic de Siguer (Template:Convert), Pic de la Serrera (Template:Convert) and Pic d'Anrodat (Template:Convert) in the north; and Pic de Noé (Template:Convert), Pic de la Cabaneta (Template:Convert) and Roc Mélé (Template:Convert) in the east.

Along the border with Spain, from west to east, the highest mountains are Pic de Médécourbe (Template:Convert), Pic de Coma Pedrosa (Template:Convert), Port de Cabús (Template:Convert) and Pic dels Llacs (Template:Convert) in the west; Pic Negre (Template:Convert), Torre dels Soldats (Template:Convert), and Pic de la Portelleta (Template:Convert) in the south.

In the east, near where the borders of the two countries meet, lies Pic d’Envalira (Template:Convert) and Pic dels Pessons (Template:Convert). A lake, Estany de l'Estanyó, and a mountain, Pic de l’Estanyó (Template:Convert) lie just east of El Serrat and are accessible only by hiking trail.

Lakes and riversEdit

Andorra is drained almost entirely by a single basin whose main river, the Gran Valira, exits the country in the south near the Spain–Andorra road border crossing.

The Valira del Nord is the northwest tributary, flowing from near El Serrat through the settlements of Les Salines, Arans, La Cortinada, Sornàs, Ordino, and La Massana — where it meets the Tristaina River — and eventually through Les Escaldes where it meets the Valira d'Orient forming the Gran Valira.

The Valira d'Orient is the northeast tributary, flowing from near Grau Roig through Soldeu, Canillo, Encamp, and Les Escaldes where it meets the Madriu River and then the Valira del Nord, becoming the Gran Valira.

There are also several much smaller drainage basins that span Andorra's borders with France and Spain. The most notable of these is the Pic de Maià basin whose main river, the Sant Josep, flows easterly out of the country into France and is a tributary of the Ariège, which is in the Garonne basin (Atlantic).

Andorra has 172 lakes, of which the largest is Estanys de Juclar (Template:Convert)<ref name="gg1"/> near Pic de Noé in the north east.

ClimateEdit

The climate in Andorra varies greatly with elevation. The valleys have an oceanic climate that is similar to the temperate climate of Andorra's neighbours, but because of the higher elevation, winters tend to be more severe, the humidity lower, and summers slightly cooler. Regions above the Alpine tree line at about Template:Convert have an alpine climate and alpine tundra. Snow completely covers the northern valleys for several months. There are, on average, 300 days per year of sunshine. Average daily peak insolation varies from 1150 W/m² in June to 280 W/m² in December.<ref name="wu1">Andorra – Escaldes,Weather Underground</ref><ref name="catmet">Atles climàtic de Catalunya. Periode 1961–1990. Servei Meteorològic de Catalunya, Generalitat de Catalunya. Template:In lang</ref>

The average annual temperature varies from Template:Convert in Sant Julià de Lòria in the south, to Template:Convert in La Massana in the centre, and to Template:Convert in Arcalis in the north.<ref name="catmet"/> The average daily high and low temperatures in Escaldes-Engordany are, respectively, Template:Convert and Template:Convert in July, and Template:Convert and Template:Convert in January.<ref name="wu1"/>

Average annual precipitation is Template:Convert for the whole country,<ref name="dss"/> but it varies across the country, increasing with elevation and from south to north. The driest parish is Sant Julià de Lòria (Template:Convert per year) in the south, and the wettest is Canillo (Template:Convert per year) in the north. Annual precipitation can exceed Template:Convert the highest mountainous areas. The driest months tend to be January and February, and the wettest, May, June, and November. During the summer months, there are very few rainy days, but the rainfall can be very heavy because it is associated with thunderstorms.<ref name="catmet"/>

Template:Weather box

Natural hazardsEdit

AvalanchesEdit

There is a risk of avalanches from mid winter to early summer. Avalanche control methods such as snow clearing by controlled blast charges, snow nets, snow fences, deflectors, rigid barriers, and snow compaction are used in Andorra to prevent dangerous avalanches.<ref name="meffre1">JF Meffre (2001), La Predicció local del perill d'allaus a Andorra Template:Dead link, La Gestió dels Riscos Naturals, Jornades del CRECIT, pp.100–106, 13/14 September 2001. Template:In lang</ref><ref>G Furdada, JM Vilaplana, E Tomàs, D Mas (1998). The avalanche of La tartera de la Pica, Andorra. Procs. conference on 25 years of snow avalanche research, 203(I):104–107, Ed: E Hestnes, Norwegian Geotechnical Institute, Oslo.</ref>

1996 Arinsal avalancheEdit

The 1996 Arinsal avalanche was an exceptionally powerful powder-snow avalanche that followed several days of very heavy snowfalls and high winds.<ref name="bd1">Bon Dia newspaper, February 1996</ref> At 19:00 on 8 February 1996, the avalanche fell on the village of Arinsal destroying or severely damaging many cars and buildings and hotels including the crest hotel the rocky mountain bar and above apartments the asterics bar and little damage to three blocks of flats that were under construction by a Russian company and still are under construction; evacuation of the residents and tourists in the village had been completed 1½ hours before the avalanche, and consequently there were no deaths, but the material and economic damages were large.<ref name="bd1"/><ref name="meffre2">Avalanche d'Arinsal en Andorre du 8 février 1996 Template:Webarchive, JF Meffre (Consellet tècnic en allaus, Servei de predicció d'allaus d'Andorra). Template:In lang</ref> Afterwards, the government ordered the construction of a snow dam across the Arinsal valley to stop future avalanches. The Arinsal snow dam, which is Template:Convert high and Template:Convert wide, cost 52 million francs and used Template:Convert of soil and Template:Convert of rock.<ref name="meffre1"/>

1970 Pas de la Casa avalancheEdit

The 1970 Pas de la Casa avalanche was a powder-snow avalanche that happened after a severe snowstorm left Template:Convert of new snow atop the existing snow pack on the mountain slopes above Pas de la Casa. The avalanche began at an elevation of Template:Convert on the upper slopes of the Pic d'Envalira (Template:Convert), accelerated down the 35° slope and spilled over six bends of the old CG-2 road that winds its way down the mountain to the village of Pas de la Casa, which is at Template:Convert. It then hit the village, damaging several buildings including a dispensary and killing a nurse.<ref name="meffre2"/> In 1970, Pas de la Casa had far fewer buildings than it does now, so the damage was relatively limited. In later years as development of the ski resort continued, plans for avalanche control measures were studied, but it was not until 1985 that strong protective features including Template:Convert of windbreaks and Template:Convert of snow fences were installed.<ref name="meffre2"/> The new CG-2 goes through the Envalira Tunnel, thus avoiding Pas de la Casa and the risk of avalanches.

LandslidesEdit

Landslides are a frequent occurrence in Andorra; they have tended to follow periods of heavy rainfall.<ref name="capons1">R Capons-Llorens (2005), El relleu postglacial al Principat d'Andorra – Les dinàmiques de vessants i fluviotorrencials Template:Dead link. Jornades del CRECIT – Horitzó, 8(2):25–33. Template:In lang</ref>

A landslide during the evening rush hour on 25 January 2008 deposited Template:Convert of loosely bound soil and rocks from the mountain slope above onto the main road CG-3 (Avinguda del Través de la Massana) between La Massana and Ordino, blocking it for three days, as well as completely covering an open-air car park and several parked cars. The only damage was to property, and nobody was injured, but the residents of a block of flats adjacent to the landslide were evacuated as the building was deemed unsafe and it remains vacant. The cause of the landslide was determined to be settlement of the earth due to inadequate ground reinforcement in the construction and excavation of the car park 30 years previously.<ref name="da1">L'esllavissada prové del desgast natural i l'excavació al pàrquing Template:Dead link, Diari d'Andorra, No.5735, pp.1,3–4, 27 January 2008</ref><ref name="3cat24a">Una esllavissada talla la carretera de la Massana a Ordino i obliga a desallotjar els veïns, 3cat24, 26 January 2008, Template:In lang</ref>

On 7 July 2009, a rock landslide fell Template:Convert onto the CG-3 main road between La Massana and Andorra La Vella, blocking the road near the entrance to the Pont Pla Tunnel for three hours. Protective nets on the mountain side caught most of the rockfall, but Template:Convert went over the nets and fell onto the road and pavement.<ref name="bd3">M Miño (2009), Una esllavissada obliga a tallar tres hores la carretera de la Massana, Bon Dia newspaper, 7 July 2009. Template:In lang</ref>

EarthquakesEdit

The Pyrenees and Catalonia have frequent and sometimes destructive earthquakes — the largest in recorded history being the Catalan earthquake of 1428 with an estimated magnitude of IX on the MSK scale, equivalent to 6.0–6.5 on the Richter magnitude scale.<ref name="igc1">Maximum felt intensities in Catalonia during the XX century Template:Webarchive, Table I: Approximative correspondence between the magnitude (Richter) and the intensity (MSK) felt in the epicentral area.</ref><ref name="igc2">Sismicitat a Catalunya Template:Webarchive, Institut Cartogràfic de Catalunya, 1999. Template:In lang</ref> However, earthquakes whose epicentres are inside Andorra tend to be smaller than magnitude 2.<ref name="igc2"/><ref name="igc3">Terratrèmols locals de Juliol de 2001 Template:Webarchive, Institut Geològic de Catalunya. Template:In lang</ref> An earthquake of magnitude 4.2 on 5 October 1999 in nearby Bagnères-de-Luchon (France) was widely felt in Andorra, causing public alarm.<ref name="vwc1">El terratremol espanta tot Andorra, pero no causa danys, VilaWeb.cat, Maresma i Associats, SL. 1999-10-05. Template:In lang</ref> The Andorran Government has studied the possibility of a damaging earthquake in Andorra.<ref name="sost1"/>

Extreme pointsEdit

File:Andorra2021OSM.png

Enlargeable, detailed map of Andorra

Latitude and longitude<ref name="geogandorra">{{#invoke: citation/CS1|citation

|CitationClass=web }}</ref>

North : Basers de Font Blanca (Template:Coord)
South : Conangle – Riu Runer (Template:Coord)
West : Coll de l'Aquell (Template:Coord)
East : Riu de la Palomera – Riu Arièja (Template:Coord)

Elevation<ref name="geogandorra"/>

Maximum : Pic del Comapedrosa, Template:Convert (Template:Coord)
Minimum : Conflent del riu Runer, Template:Convert (Template:Coord)

Centre

Geographical centre : near Encamp, Template:Coord

ReferencesEdit

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