HydroBASINS lev08 watershed · #2080545660
Bassin de la Loire
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 : Ardèche, Haute-Loire, Puy-de-Dôme
Sub-basin area
1 971,9km²
Upstream area
1 971,9km²
Discharge
22,86m³/s
Mean elev.
969m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
3 dept-equivalent regions (GADM L2)
- 1644.6 km²83.2% of basin
- 313.4 km²15.9% of basin
- 18.3 km²0.9% of basin
130 communes (GADM L5)Available for FRA, RWA
- Cros-de-Géorand42.90 km²100% commune
- Saint-Front41.41 km²80% commune
- Saint-Paulien40.64 km²100% commune
- Vorey39.92 km²100% commune
- Le Monastier-sur-Gazeille39.10 km²100% commune
- Bains37.87 km²99% commune
- Mazan-l'Abbaye36.04 km²77% commune
- Le Brignon35.18 km²100% commune
- Retournac34.49 km²76% commune
- Polignac33.52 km²100% commune
- Le Béage33.28 km²100% commune
- Bellevue-la-Montagne33.16 km²100% commune
- Céaux-d'Allègre33.05 km²100% commune
- Les Estables33.01 km²97% commune
- Yssingeaux32.97 km²40% commune
- Cayres29.16 km²98% commune
- Saint-Julien-Chapteuil28.86 km²100% commune
- Saint-Germain-Laprade28.64 km²100% commune
- Rosières27.86 km²100% commune
- Issanlas27.61 km²96% commune
- Saint-Christophe-sur-Dolaison27.52 km²100% commune
- Monlet27.05 km²77% commune
- Chomelix26.04 km²97% commune
- Saint-Jean-de-Nay25.42 km²87% commune
- Loudes25.04 km²100% commune
- Coucouron24.68 km²100% commune
- Laussonne24.55 km²100% commune
- Solignac-sur-Loire24.28 km²100% commune
- Saint-Pierre-Eynac23.96 km²100% commune
- Allègre23.52 km²100% commune
- Lantriac22.99 km²100% commune
- Coubon22.98 km²100% commune
- Beaulieu22.69 km²100% commune
- Présailles22.63 km²100% commune
- Saint-Cirgues-en-Montagne22.48 km²99% commune
- Sainte-Eulalie21.85 km²96% commune
- Sagnes-et-Goudoulet21.55 km²87% commune
- Salettes20.99 km²100% commune
- Saint-Vincent20.86 km²100% commune
- Lachapelle-Graillouse20.57 km²100% commune
- Vergezac20.32 km²96% commune
- Saint-Martin-de-Fugères20.27 km²100% commune
- Vernassal19.69 km²100% commune
- Roche-en-Régnier19.29 km²71% commune
- Issarlès19.00 km²100% commune
- Félines18.89 km²92% commune
- Saint-Pierre-du-Champ18.47 km²61% commune
- Landos17.91 km²47% commune
- Saint-Julien-du-Pinet17.59 km²100% commune
- Le Puy-en-Velay17.48 km²100% commune
- Beaux17.07 km²100% commune
- Chaspinhac16.78 km²100% commune
- Saint-Geneys-près-Saint-Paulien16.50 km²100% commune
- Saint-Maurice-de-Lignon16.00 km²54% commune
- Freycenet-la-Cuche15.92 km²100% commune
- Saint-Arcons-de-Barges15.88 km²100% commune
- Jullianges15.62 km²84% commune
- Sanssac-l'Église15.23 km²100% commune
- Beauzac15.01 km²41% commune
- Saint-Jean-d'Aubrigoux14.46 km²79% commune
- Queyrières14.07 km²98% commune
- Beaune-sur-Arzon14.03 km²95% commune
- Le Lac-d'Issarlès14.02 km²100% commune
- Malrevers13.49 km²100% commune
- Saint-Hostien13.38 km²100% commune
- Chamalières-sur-Loire13.31 km²100% commune
- Chadron13.27 km²100% commune
- Arlempdes13.18 km²100% commune
- Saint-Paul-de-Tartas12.76 km²46% commune
- Lafarre12.58 km²100% commune
- Usclades-et-Rieutord12.29 km²100% commune
- Le Pertuis12.21 km²100% commune
- Saint-Étienne-Lardeyrol12.11 km²100% commune
- Craponne-sur-Arzon12.10 km²36% commune
- Alleyrac11.97 km²100% commune
- Séneujols11.78 km²99% commune
- Lissac11.71 km²100% commune
- Arsac-en-Velay11.50 km²100% commune
- Vazeilles-Limandre11.38 km²98% commune
- Ceyssac10.98 km²100% commune
- Montusclat10.55 km²100% commune
- Lavoûte-sur-Loire10.54 km²100% commune
- Chaspuzac10.22 km²100% commune
- Cussac-sur-Loire9.76 km²100% commune
- Medeyrolles9.68 km²57% commune
- Moudeyres9.07 km²100% commune
- Mézères8.71 km²100% commune
- Sauvessanges8.66 km²26% commune
- Blanzac8.40 km²100% commune
- Freycenet-la-Tour8.26 km²100% commune
- Saint-Vidal8.03 km²100% commune
- Bessamorel7.54 km²100% commune
- Champclause7.18 km²33% commune
- Vielprat6.83 km²100% commune
- Barges6.73 km²100% commune
- La Chapelle-Bertin6.35 km²56% commune
- Blavozy6.33 km²100% commune
- Espaly-Saint-Marcel5.79 km²100% commune
- Lavillatte5.54 km²29% commune
- Borne5.40 km²100% commune
- Varennes-Saint-Honorat5.09 km²43% commune
- Le Bouchet-Saint-Nicolas4.92 km²26% commune
- Vals-près-le-Puy4.90 km²100% commune
- Burzet4.80 km²13% commune
- Goudet4.39 km²100% commune
- Brives-Charensac4.33 km²100% commune
- Saint-Victor-sur-Arlanc3.64 km²30% commune
- Costaros3.50 km²100% commune
- Lanarce2.74 km²12% commune
- Le Vernet2.74 km²75% commune
- Fix-Saint-Geneys2.48 km²32% commune
- Chadrac2.36 km²100% commune
- Le Monteil2.12 km²100% commune
- Saint-Jean-Lachalm1.63 km²5% commune
- Sembadel1.41 km²8% commune
- Le Roux1.37 km²8% commune
- Lespéron1.25 km²5% commune
- Aiguilhe0.88 km²100% commune
- Astet0.72 km²2% commune
- Pradelles0.65 km²4% commune
- Saint-Martial0.31 km²1% commune
- Borée0.22 km²1% commune
- Solignac-sous-Roche0.19 km²2% commune
- Montpezat-sous-Bauzon0.14 km²0% commune
- Siaugues-Sainte-Marie0.03 km²0% commune
- Saint-Privat-d'Allier0.03 km²0% commune
- Araules0.02 km²0% commune
- Fay-sur-Lignon0.01 km²0% commune
- Josat0.00 km²0% commune
- Vissac-Auteyrac0.00 km²0% commune
30 intersecting protected areas
Gorges de la Loire
IUCN Not ReportedSpecial Protection Area (Birds Directive)
376.74 km² overlap
Monts D\'Ardèche
IUCN VRegional Nature Park
350.67 km² overlap
Livradois-Forez
IUCN VRegional Nature Park
174.63 km² overlap
Gorges de la Loire et affluents partie sud
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
70.69 km² overlap
Mézenc
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
12.97 km² overlap
Loire et ses affluents
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
12.96 km² overlap
Gorges de l'Arzon
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
8.77 km² overlap
Secteur des Sucs
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
4.71 km² overlap
Carrière de Solignac (dite de Coucouron)
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
2.20 km² overlap
21 more protected areassorted by overlap area
Le Mezenc
IUCN IVForest Managed Biological Reserve
1.93 km² overlap
Sucs du Velay / Meygal
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.80 km² overlap
Cévennes ardèchoises
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.49 km² overlap
Sucs de Breysse
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.18 km² overlap
Grotte de la Denise
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.58 km² overlap
Special Areas of Conservation (Habitats Directive)
0.47 km² overlap
Marais de Limagne
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.26 km² overlap
Mont Bar
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.21 km² overlap
suc de bauzon
IUCN IVLand acquired by a regional conservatory of natural areas
0.16 km² overlap
tourbiere de la couleyre
IUCN IVLand acquired by a regional conservatory of natural areas
0.15 km² overlap
Land acquired by a regional conservatory of natural areas
0.13 km² overlap
tourbiere de sagne-redonde
IUCN IVLand acquired by a regional conservatory of natural areas
0.11 km² overlap
marais d\'ours
IUCN IVLand acquired by a regional conservatory of natural areas
0.09 km² overlap
Land acquired by a regional conservatory of natural areas
0.07 km² overlap
grotte et mont de la denise
IUCN IVLand acquired by a regional conservatory of natural areas
0.07 km² overlap
volcan du mont-bar
IUCN IVLand acquired by a regional conservatory of natural areas
0.06 km² overlap
Gorges de l'Allier et affluents
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.06 km² overlap
Land acquired by a regional conservatory of natural areas
0.06 km² overlap
toubiere de goudoffre
IUCN IVLand acquired by a regional conservatory of natural areas
0.03 km² overlap
Land acquired by a regional conservatory of natural areas
0.03 km² overlap
prairies humides de monlet
IUCN IVLand acquired by a regional conservatory of natural areas
0.03 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
6 652 distinct species · 674 255 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 31 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 Loire : 27 espèces + 4 bulles famille, 44 interactions GloBI documentées sur 7 types (connectance 9.5%, filtre Serrano α=0.2). Les 4 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°
7,9°C
Annual rain
771mm
Moisture idx (CMI)
-0,03
Runoff
394mm/an
PET
798mm
AET
614mm
Mean slope
7,3°
Water table
432cm
Forest
58%
Crops
20%
Urban
2%
Protected
12%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)