HydroBASINS lev08 watershed · #2080552800
Bassin de la Truyère
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 : Cantal, Haute-Loire, Lozère
Sub-basin area
472,3km²
Upstream area
916,3km²
Discharge
11,67m³/s
Mean elev.
1 040m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de la Truyère236 km²
- Bassin de la Rimeize207 km²
3 dept-equivalent regions (GADM L2)
- 293.2 km²61.9% of basin
- 178.5 km²37.7% of basin
- 1.7 km²0.4% of basin
34 communes (GADM L5)Available for FRA, RWA
- Saint-Alban-sur-Limagnole51.68 km²100% commune
- Le Malzieu-Forain45.98 km²94% commune
- Clavières31.74 km²70% commune
- Ruynes-en-Margeride29.53 km²99% commune
- Loubaresse28.97 km²100% commune
- Lorcières21.81 km²100% commune
- Saint-Léger-du-Malzieu19.27 km²100% commune
- Saint-Privat-du-Fau19.21 km²87% commune
- Chaliers18.77 km²100% commune
- Lajo18.26 km²100% commune
- Les Monts-Verts17.95 km²62% commune
- Sainte-Eulalie16.56 km²77% commune
- Albaret-Sainte-Marie15.54 km²99% commune
- Faverolles14.83 km²43% commune
- Saint-Pierre-le-Vieux14.30 km²92% commune
- Saint-Just13.19 km²78% commune
- Blavignac12.90 km²91% commune
- Prunières12.48 km²97% commune
- Fontans10.74 km²31% commune
- Chaulhac9.68 km²100% commune
- Julianges9.43 km²100% commune
- Le Malzieu-Ville7.84 km²100% commune
- Saint-Marc7.48 km²84% commune
- Saint-Denis-en-Margeride6.56 km²17% commune
- Anglards-de-Saint-Flour6.25 km²53% commune
- Rimeize3.88 km²12% commune
- Védrines-Saint-Loup2.17 km²8% commune
- Saint-Georges2.04 km²6% commune
- Chanaleilles1.71 km²3% commune
- Vabres1.64 km²9% commune
- Saint-Paul-le-Froid0.44 km²1% commune
- Saint-Chély-d'Apcher0.42 km²1% commune
- Alleuze0.05 km²0% commune
- Paulhac-en-Margeride0.02 km²0% commune
7 intersecting protected areas
Montagne de la Margeride
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
45.15 km² overlap
Gorges de la Truyère
IUCN Not ReportedSpecial Protection Area (Birds Directive)
19.17 km² overlap
Sommets du nord Margeride
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
6.02 km² overlap
Sommets et versants orientaux de la Margeride
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.49 km² overlap
Lac de grandval
IUCN IVLand acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)
0.06 km² overlap
Section à moules perlières de la Truyère
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.05 km² overlap
Biotope Protection Order
0.04 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 563 distinct species · 100 025 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 32 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 la Truyère : 24 espèces + 8 bulles famille, 67 interactions GloBI documentées sur 7 types (connectance 13.5%, filtre Serrano α=0.2). Les 8 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°
7,8°C
Annual rain
791mm
Moisture idx (CMI)
-0,02
Runoff
410mm/an
PET
809mm
AET
634mm
Mean slope
6,9°
Water table
423cm
Forest
68%
Crops
2%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)