HydroBASINS lev08 watershed · #2080541830
Bassin de l'Allier
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 2 administrative regions : Haute-Loire, Puy-de-Dôme
Sub-basin area
394,2km²
Upstream area
3 058,8km²
Discharge
32,11m³/s
Mean elev.
609m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de la Senouire416 km²
- Bassin du Ceroux252 km²
2 dept-equivalent regions (GADM L2)
- 293.6 km²74.3% of basin
- 101.6 km²25.7% of basin
46 communes (GADM L5)Available for FRA, RWA
- Agnat20.23 km²100% commune
- Azérat17.99 km²100% commune
- Auzon17.20 km²100% commune
- Champagnac-le-Vieux17.20 km²83% commune
- Chassignolles17.00 km²92% commune
- Bournoncle-Saint-Pierre16.27 km²100% commune
- Saint-Just-près-Brioude15.13 km²32% commune
- Saint-Martin-d'Ollières15.03 km²100% commune
- Saint-Jean-Saint-Gervais14.73 km²100% commune
- Chaniat14.42 km²100% commune
- Saint-Hilaire14.34 km²100% commune
- Brioude13.52 km²100% commune
- Vernet-la-Varenne13.32 km²37% commune
- Saint-Beauzire13.05 km²53% commune
- Lamothe12.10 km²100% commune
- Beaumont11.86 km²99% commune
- Vergongheon11.75 km²95% commune
- Cohade10.39 km²100% commune
- Auzat-la-Combelle10.02 km²77% commune
- Saint-Géron9.90 km²93% commune
- Champagnat-le-Jeune9.04 km²100% commune
- Fontannes9.01 km²91% commune
- Paulhac8.50 km²100% commune
- Saint-Laurent-Chabreuges8.28 km²100% commune
- Javaugues6.99 km²98% commune
- Jumeaux6.95 km²100% commune
- Peslières6.72 km²100% commune
- Vézézoux6.70 km²100% commune
- Brassac-les-Mines5.92 km²79% commune
- Sainte-Catherine5.69 km²100% commune
- Valz-sous-Châteauneuf5.00 km²100% commune
- Saint-Didier-sur-Doulon4.97 km²15% commune
- Sainte-Florine3.85 km²47% commune
- Lavaudieu3.85 km²22% commune
- Saint-Germain-l'Herm3.24 km²9% commune
- La Chapelle-sur-Usson3.19 km²46% commune
- Vieille-Brioude2.97 km²11% commune
- Frugières-le-Pin2.72 km²24% commune
- Esteil2.38 km²55% commune
- Lempdes-sur-Allagnon1.07 km²10% commune
- Saint-Vert0.93 km²4% commune
- Frugerès-les-Mines0.82 km²94% commune
- Lorlanges0.52 km²4% commune
- Fayet-Ronaye0.31 km²2% commune
- Lamontgie0.05 km²1% commune
- Lubilhac0.04 km²0% commune
14 intersecting protected areas
Livradois-Forez
IUCN VRegional Nature Park
139.06 km² overlap
Val d'Allier Limagne Brivadoise
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
7.20 km² overlap
Special Areas of Conservation (Habitats Directive)
2.40 km² overlap
Val d'Allier - Alagnon
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.49 km² overlap
Côteaux de Montlaison / la Garenne / Prés salés de Beaumont
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.83 km² overlap
Land acquired by a regional conservatory of natural areas
0.16 km² overlap
Saint-Beauzire
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.11 km² overlap
Land acquired by a regional conservatory of natural areas
0.08 km² overlap
Land acquired by a regional conservatory of natural areas
0.04 km² overlap
5 more protected areassorted by overlap area
Land acquired by a regional conservatory of natural areas
0.03 km² overlap
val d\'allier a cohade
IUCN IVLand acquired by a regional conservatory of natural areas
0.02 km² overlap
Land acquired by a regional conservatory of natural areas
0.01 km² overlap
val d\'allier a vergongheon
IUCN IVLand acquired by a regional conservatory of natural areas
0.01 km² overlap
Lacs d'Espalem et de Lorlanges
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
3 624 distinct species · 116 052 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 35 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'Allier : 28 espèces + 7 bulles famille, 85 interactions GloBI documentées sur 7 types (connectance 14.3%, filtre Serrano α=0.2). Les 7 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°
9,8°C
Annual rain
666mm
Moisture idx (CMI)
-0,24
Runoff
291mm/an
PET
886mm
AET
564mm
Mean slope
6,3°
Water table
317cm
Forest
54%
Crops
37%
Urban
5%
Protected
29%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)