HydroBASINS lev08 watershed · #2080589650
Bassin de l'Ariège
A watershed (drainage basin) is not a body of water — it is the land area where rainfall converges towards a single river that eventually reaches the sea (or an endorheic basin). Boundaries follow ridgelines.
Crosses 3 administrative regions : Ariège, Aude, Pyrénées-Orientales
Sub-basin area
520,4km²
Upstream area
520,4km²
Discharge
5,47m³/s
Mean elev.
1 672m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
3 dept-equivalent regions (GADM L2)
- 475.2 km²91.2% of basin
- 28.5 km²5.5% of basin
- 0.4 km²0.1% of basin
46 communes (GADM L5)Available for FRA, RWA
- Mérens-les-Vals79.99 km²100% commune
- Orlu70.93 km²99% commune
- Ascou34.82 km²98% commune
- Ax-les-Thermes29.86 km²100% commune
- Savignac-les-Ormeaux28.27 km²99% commune
- L'Hospitalet-près-l'Andorre26.57 km²100% commune
- Luzenac26.57 km²99% commune
- Sorgeat19.21 km²95% commune
- Orgeix18.70 km²100% commune
- Perles-et-Castelet17.45 km²100% commune
- Caussou15.80 km²100% commune
- Porta14.91 km²22% commune
- Lassur12.11 km²100% commune
- Porté-Puymorens10.68 km²21% commune
- Verdun9.27 km²81% commune
- Axiat9.04 km²100% commune
- Albiès7.71 km²96% commune
- Vernaux6.47 km²100% commune
- Appy6.04 km²100% commune
- Lordat5.65 km²73% commune
- Bestiac5.52 km²95% commune
- Caychax5.36 km²100% commune
- Vèbre5.33 km²100% commune
- Senconac5.03 km²100% commune
- Ignaux4.97 km²100% commune
- Vaychis4.56 km²100% commune
- Tignac3.63 km²100% commune
- Pech3.25 km²71% commune
- Garanou2.91 km²100% commune
- Prades2.70 km²9% commune
- Unac2.57 km²100% commune
- Angoustrine-Villeneuve-des-Escal1.57 km²2% commune
- Cazenave-Serres-et-Allens1.48 km²9% commune
- Formiguères1.13 km²2% commune
- Urs0.91 km²100% commune
- Aston0.76 km²0% commune
- Les Cabannes0.54 km²70% commune
- Mijanès0.48 km²1% commune
- Montferrier0.44 km²1% commune
- Montségur0.25 km²1% commune
- La Fajolle0.21 km²1% commune
- Fontrabiouse0.17 km²1% commune
- Mérial0.14 km²1% commune
- Montaillou0.03 km²0% commune
- Artigues0.02 km²0% commune
- Ornolac-Ussat-les-Bains0.00 km²0% commune
18 intersecting protected areas
Special Areas of Conservation (Habitats Directive)
43.42 km² overlap
Quérigut, Orlu
IUCN Not ReportedSpecial Protection Area (Birds Directive)
43.42 km² overlap
Orlu
IUCN IVNational Hunting and Wildlife Reserve
42.67 km² overlap
Capcir-Carlit-Campcardos
IUCN Not ReportedSpecial Protection Area (Birds Directive)
24.69 km² overlap
Capcir, Carlit et Campcardos
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
24.69 km² overlap
Pyrénées Catalanes
IUCN VRegional Nature Park
24.43 km² overlap
Special Protection Area (Birds Directive)
3.05 km² overlap
Special Areas of Conservation (Habitats Directive)
3.05 km² overlap
Gorges de la Frau et Bélesta
IUCN Not ReportedSpecial Protection Area (Birds Directive)
2.05 km² overlap
9 more protected areassorted by overlap area
Vallée de l'Aston
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.92 km² overlap
Pays de Sault
IUCN Not ReportedSpecial Protection Area (Birds Directive)
0.33 km² overlap
Garonne, Ariège, Hers, Salat, Pique et Neste
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.24 km² overlap
Massif De Saint-Barthélémy
IUCN IVRegional Nature Reserve
0.24 km² overlap
Bassin du Rebenty
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.16 km² overlap
la fajolle
IUCN IVLand acquired by a regional conservatory of natural areas
0.15 km² overlap
Falaises dites \'du Quié\'
IUCN IVBiotope Protection Order
0.09 km² overlap
Biotope Protection Order
0.05 km² overlap
Laurenti
IUCN IVForest Managed Biological Reserve
0.04 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
5 878 distinct species · 139 311 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 36 species (selected proportionally per kingdom among those with at least one documented interaction here) to keep the graph readable. Hover for details, click to explore the full ecosystem of a species.
ℹ️ The territory contains many more species than displayed and all their documented interactions: the graph is intentionally the structural skeleton (top-N species by composite local score, edges filtered by Serrano 2009 disparity filter α=0.2).
Indicateurs du tissu écologique
Tissu écologique de Bassin de l'Ariège : 33 espèces + 3 bulles famille, 55 interactions GloBI documentées sur 4 types (connectance 8.7%, filtre Serrano α=0.2). Les 3 bulles regroupent des espèces visuellement absorbées par famille (≥3 espèces visibles).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydroclimate (BasinATLAS lev08)
Mean T°
6,0°C
Annual rain
1 143mm
Moisture idx (CMI)
0,38
Runoff
351mm/an
PET
684mm
AET
633mm
Mean slope
22,8°
Water table
837cm
Forest
78%
Crops
6%
Urban
0%
Protected
13%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)