HydroBASINS lev08 watershed · #2080556580
Bassin de l'Eyrieux
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, Drôme, Haute-Loire
Sub-basin area
1 521km²
Upstream area
67 306,1km²
Discharge
1 368,08m³/s
Mean elev.
551m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de l'Herbasse778 km²
- Bassin du Rhône108 km²
3 dept-equivalent regions (GADM L2)
- 994.6 km²65.2% of basin
- 516.2 km²33.9% of basin
- 13.5 km²0.9% of basin
127 communes (GADM L5)Available for FRA, RWA
- Étoile-sur-Rhône40.42 km²100% commune
- Chabeuil39.51 km²100% commune
- Valence36.88 km²100% commune
- Saint-Martial36.46 km²99% commune
- Toulaud34.44 km²100% commune
- Combovin31.55 km²89% commune
- Gilhac-et-Bruzac31.44 km²100% commune
- Vernoux-en-Vivarais30.59 km²97% commune
- Livron-sur-Drôme30.44 km²74% commune
- Borée28.16 km²99% commune
- Alixan25.70 km²91% commune
- Pranles25.38 km²87% commune
- Saint-Agrève25.22 km²52% commune
- Gluiras25.04 km²100% commune
- Saint-Péray24.67 km²100% commune
- Montélier24.67 km²100% commune
- Saint-Jean-Roure23.84 km²100% commune
- Montmeyran23.16 km²100% commune
- Saint-Fortunat-sur-Eyrieux22.97 km²100% commune
- Silhac22.87 km²100% commune
- Saint-Genest-Lachamp22.54 km²100% commune
- Saint-Pierreville20.55 km²100% commune
- Saint-Martin-de-Valamas20.43 km²100% commune
- Saint-Laurent-du-Pape19.95 km²99% commune
- Arcens19.04 km²100% commune
- Saint-Clément18.90 km²94% commune
- Dornas17.91 km²100% commune
- Beaumont-lès-Valence17.39 km²100% commune
- Montvendre17.29 km²100% commune
- Mézilhac17.22 km²64% commune
- Châteaudouble16.94 km²99% commune
- Saint-Étienne-de-Serre16.88 km²100% commune
- Saint-Julien-Labrousse16.56 km²99% commune
- Upie16.45 km²84% commune
- Montoison16.24 km²100% commune
- Saint-Andéol-de-Fourchades16.14 km²97% commune
- Mariac16.06 km²100% commune
- Issamoulenc15.98 km²100% commune
- Marcols-les-Eaux15.90 km²100% commune
- Saint-Julien-du-Gua15.88 km²93% commune
- Charpey15.61 km²98% commune
- Saint-Christol15.43 km²100% commune
- Chanéac15.39 km²100% commune
- Saint-Jean-Chambre15.03 km²100% commune
- La Baume-Cornillane14.99 km²100% commune
- Portes-lès-Valence14.56 km²100% commune
- Bourg-lès-Valence14.31 km²71% commune
- Saint-Georges-les-Bains14.24 km²100% commune
- La Rochette13.62 km²99% commune
- Barbières13.61 km²95% commune
- Saint-Vincent-la-Commanderie13.45 km²99% commune
- Le Cheylard13.34 km²100% commune
- Saint-Marcel-lès-Valence13.18 km²91% commune
- Saint-Michel-de-Chabrillanoux12.03 km²100% commune
- Ajoux11.96 km²97% commune
- Beauvène11.91 km²100% commune
- Les Vastres11.78 km²39% commune
- Saint-Vincent-de-Durfort11.78 km²93% commune
- Saint-Sauveur-de-Montagut11.21 km²100% commune
- Boffres11.08 km²35% commune
- Saint-Julien-Boutières10.98 km²100% commune
- Peyrus10.67 km²100% commune
- Le Chambon10.46 km²100% commune
- Malissard10.40 km²100% commune
- Intres10.34 km²100% commune
- Mars9.80 km²52% commune
- Montéléger9.68 km²100% commune
- Accons9.57 km²100% commune
- Chalencon9.57 km²100% commune
- Saint-Cierge-la-Serre9.28 km²60% commune
- Albon-d'Ardèche9.21 km²100% commune
- La Voulte-sur-Rhône9.01 km²91% commune
- Nonières8.94 km²93% commune
- Lachapelle-sous-Chanéac8.77 km²100% commune
- Ourches8.76 km²99% commune
- Beauchastel8.54 km²100% commune
- Saint-Julien-le-Roux8.38 km²100% commune
- Soyons8.27 km²100% commune
- Saint-Michel-d'Aurance8.08 km²100% commune
- Barcelonne8.03 km²100% commune
- Saint-Apollinaire-de-Rias7.74 km²93% commune
- Dunière-sur-Eyrieux7.62 km²100% commune
- Les Ollières-sur-Eyrieux7.59 km²100% commune
- Saint-Maurice-en-Chalencon7.41 km²100% commune
- Saint-Barthélemy-le-Meil7.36 km²100% commune
- Alboussière6.66 km²36% commune
- Cornas6.56 km²76% commune
- Châteauneuf-sur-Isère6.44 km²14% commune
- Guilherand-Granges6.26 km²100% commune
- Saint-Cierge-sous-le-Cheylard5.90 km²100% commune
- Charmes-sur-Rhône5.83 km²100% commune
- Châteauneuf-de-Vernoux5.71 km²100% commune
- Léoncel5.70 km²13% commune
- Vaunaveys-la-Rochette4.77 km²21% commune
- Bésayes4.57 km²48% commune
- Devesset4.27 km²14% commune
- Allex3.85 km²19% commune
- Jaunac3.79 km²100% commune
- Creysseilles3.45 km²34% commune
- Champis3.04 km²19% commune
- Beauvallon2.99 km²100% commune
- Lachamp-Raphaël2.72 km²18% commune
- Gigors-et-Lozeron2.45 km²7% commune
- Lyas1.60 km²19% commune
- Chaudeyrolles1.49 km²8% commune
- Ambonil1.06 km²100% commune
- Sainte-Eulalie0.89 km²4% commune
- Saint-Romain-de-Lerps0.79 km²6% commune
- Saint-Basile0.64 km²3% commune
- Pourchères0.41 km²5% commune
- Saint-Prix0.34 km²2% commune
- Bourg-de-Péage0.25 km²2% commune
- Rompon0.25 km²1% commune
- Rochefort-Samson0.24 km²1% commune
- Les Estables0.14 km²0% commune
- Saint-Barthélemy-Grozon0.14 km²1% commune
- Gourdon0.12 km²1% commune
- Genestelle0.12 km²1% commune
- Lamastre0.09 km²0% commune
- Le Chambon-sur-Lignon0.08 km²0% commune
- Flaviac0.07 km²1% commune
- Antraigues-sur-Volane0.02 km²0% commune
- Marches0.01 km²0% commune
- Coux0.00 km²0% commune
- Saint-Joseph-des-Bancs0.00 km²0% commune
- La Roche-de-Glun0.00 km²0% commune
- Le Béage0.00 km²0% commune
15 intersecting protected areas
Monts D\'Ardèche
IUCN VRegional Nature Park
742.38 km² overlap
Vallée de l'Eyrieux et ses affluents
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
201.19 km² overlap
Vercors
IUCN VRegional Nature Park
39.20 km² overlap
Gervanne et rebord occidental du Vercors
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
36.08 km² overlap
Affluents rive droite du Rhône
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
10.18 km² overlap
Secteur des Sucs
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
3.72 km² overlap
Massifs de Crussol, Soyons, Cornas-Chateaubourg
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
3.53 km² overlap
Milieux alluviaux du Rhône aval
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.18 km² overlap
Tourbières du plateau de Saint-Agrève
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.96 km² overlap
6 more protected areassorted by overlap area
Printegarde
IUCN Not ReportedSpecial Protection Area (Birds Directive)
0.93 km² overlap
Rompon-Ouvèze-Payre
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.88 km² overlap
Le Mezenc
IUCN IVForest Managed Biological Reserve
0.46 km² overlap
Mézenc
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.33 km² overlap
Land acquired by a regional conservatory of natural areas
0.23 km² overlap
Lac De Montoison
IUCN IVBiotope Protection Order
0.03 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
7 337 distinct species · 541 153 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 41 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'Eyrieux : 37 espèces + 4 bulles famille, 66 interactions GloBI documentées sur 7 types (connectance 8.0%, 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°
10,1°C
Annual rain
856mm
Moisture idx (CMI)
-0,03
Runoff
433mm/an
PET
889mm
AET
665mm
Mean slope
10,4°
Water table
404cm
Forest
64%
Crops
22%
Urban
6%
Protected
43%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)