HydroBASINS lev08 watershed · #2080565320
Bassin de l'Ardèche
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, Gard, Lozère
Sub-basin area
2 393,5km²
Upstream area
2 393,7km²
Discharge
40,71m³/s
Mean elev.
583m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
3 dept-equivalent regions (GADM L2)
- 1949.5 km²81.3% of basin
- 326.5 km²13.6% of basin
- 122.6 km²5.1% of basin
184 communes (GADM L5)Available for FRA, RWA
- Lagorce69.17 km²100% commune
- Prévenchères61.56 km²100% commune
- Altier54.77 km²99% commune
- Chasseradès42.39 km²68% commune
- Cubières42.11 km²85% commune
- Sablières38.28 km²100% commune
- Malarce-sur-la-Thines37.29 km²100% commune
- Montselgues37.06 km²100% commune
- Saint-Remèze33.88 km²77% commune
- Burzet33.22 km²87% commune
- Borne31.83 km²99% commune
- Pourcharesses31.73 km²99% commune
- La Souche31.69 km²100% commune
- Mayres29.11 km²100% commune
- Vallon-Pont-d'Arc29.00 km²100% commune
- Montpezat-sous-Bauzon27.33 km²100% commune
- Lablachère27.19 km²100% commune
- Pied-de-Borne27.04 km²100% commune
- Valgorge27.01 km²100% commune
- Bidon26.68 km²92% commune
- Berrias-et-Casteljau26.20 km²98% commune
- Saint-Laurent-les-Bains25.89 km²98% commune
- Grospierres25.68 km²95% commune
- Villeneuve-de-Berg25.23 km²100% commune
- Saint-Pierre-Saint-Jean24.50 km²100% commune
- Barnas24.47 km²100% commune
- Jaujac24.45 km²100% commune
- Saint-Maurice-d'Ibie23.61 km²100% commune
- Labastide-de-Virac22.95 km²100% commune
- Genestelle22.36 km²99% commune
- Beaulieu21.96 km²83% commune
- Thueyts21.62 km²100% commune
- Banne21.58 km²65% commune
- Rochecolombe21.50 km²100% commune
- Sanilhac21.18 km²100% commune
- Aiguèze20.38 km²100% commune
- Mirabel20.19 km²100% commune
- Vals-les-Bains19.68 km²100% commune
- Beaumont19.28 km²100% commune
- Vesseaux19.12 km²100% commune
- Saint-Marcel-d'Ardèche18.91 km²52% commune
- Balazuc18.73 km²100% commune
- Les Vans18.61 km²59% commune
- Astet18.39 km²53% commune
- Gravières18.17 km²99% commune
- Labeaume17.96 km²100% commune
- Laboule17.61 km²100% commune
- Saint-Alban-Auriolles17.30 km²100% commune
- Labastide-sur-Bésorgues17.20 km²100% commune
- Salavas17.12 km²100% commune
- Saint-André-Lachamp17.11 km²100% commune
- Gras17.07 km²30% commune
- Saint-Andéol-de-Vals16.89 km²100% commune
- Vagnas16.82 km²70% commune
- Rocles16.54 km²100% commune
- Rosières16.54 km²100% commune
- Saint-Paulet-de-Caisson16.40 km²100% commune
- Darbres16.29 km²100% commune
- Lussas16.25 km²100% commune
- Dompnac16.01 km²100% commune
- Saint-Laurent-sous-Coiron15.53 km²99% commune
- Le Roux15.04 km²92% commune
- Lavilledieu14.89 km²100% commune
- Saint-Étienne-de-Boulogne14.82 km²100% commune
- Malons-et-Elze14.56 km²46% commune
- Aubenas14.33 km²100% commune
- Les Assions14.18 km²100% commune
- Laviolle13.89 km²100% commune
- Saint-Frézal-d'Albuges13.69 km²80% commune
- Payzac13.48 km²100% commune
- Antraigues-sur-Volane13.45 km²100% commune
- Saint-Andéol-de-Berg13.35 km²87% commune
- Joyeuse13.16 km²100% commune
- Saint-Julien-de-Peyrolas12.88 km²100% commune
- Meyras12.70 km²100% commune
- Chassiers12.62 km²100% commune
- Péreyres12.41 km²100% commune
- Saint-Joseph-des-Bancs12.37 km²100% commune
- Vogüé12.32 km²100% commune
- Gourdon12.24 km²94% commune
- Joannas12.21 km²100% commune
- Chambonas12.15 km²100% commune
- Ruoms12.05 km²100% commune
- Lachamp-Raphaël12.00 km²82% commune
- La Bastide-Puylaurent11.98 km²50% commune
- Saint-Gineis-en-Coiron11.97 km²88% commune
- Chandolas11.73 km²100% commune
- Vinezac11.02 km²100% commune
- Cubiérettes11.01 km²98% commune
- Mazan-l'Abbaye10.65 km²23% commune
- Laval-Saint-Roman10.57 km²100% commune
- Saint-Mélany10.48 km²100% commune
- Belvezet10.45 km²84% commune
- Chauzon10.42 km²100% commune
- Lachapelle-sous-Aubenas10.35 km²100% commune
- Prades10.17 km²100% commune
- Lanas9.93 km²100% commune
- Saint-Pierre-de-Colombier9.89 km²100% commune
- Saint-Julien-du-Serre9.79 km²100% commune
- Saint-Jean-le-Centenier9.72 km²63% commune
- Saint-Étienne-de-Fontbellon9.72 km²100% commune
- Saint-Germain9.66 km²100% commune
- Mézilhac9.50 km²36% commune
- Sainte-Marguerite-Lafigère9.49 km²100% commune
- Loubaresse9.22 km²100% commune
- Prunet9.13 km²100% commune
- Laval-d'Aurelle8.88 km²100% commune
- Saint-Just8.86 km²89% commune
- Laurac-en-Vivarais8.80 km²100% commune
- Lentillères8.78 km²100% commune
- Sampzon8.51 km²100% commune
- Ailhon8.38 km²100% commune
- Asperjoc8.31 km²100% commune
- Juvinas8.21 km²100% commune
- Pradons8.03 km²100% commune
- Le Garn7.98 km²73% commune
- Valvignères7.70 km²25% commune
- Salazac7.58 km²75% commune
- Fabras7.43 km²100% commune
- Mercuer7.41 km²100% commune
- Villefort7.39 km²92% commune
- Largentière7.33 km²100% commune
- Saint-Michel-de-Boulogne7.26 km²100% commune
- Carsan7.16 km²62% commune
- Montbel7.13 km²30% commune
- Issirac6.75 km²33% commune
- Ribes6.60 km²100% commune
- Aizac6.54 km²100% commune
- Montréal6.50 km²100% commune
- Chirols6.42 km²100% commune
- Saint-Privat6.24 km²100% commune
- Saint-Christol-de-Rodières6.09 km²78% commune
- Saint-Sernin5.86 km²100% commune
- Saint-Martin-d'Ardèche5.81 km²100% commune
- Ucel5.65 km²100% commune
- Les Salelles5.60 km²100% commune
- Faugères5.51 km²100% commune
- Pont-Saint-Esprit5.38 km²29% commune
- Berzème5.30 km²29% commune
- Barjac5.29 km²12% commune
- Planzolles5.25 km²100% commune
- Saint-Maurice-d'Ardèche5.13 km²100% commune
- Saint-Genest-de-Beauzon4.79 km²100% commune
- Chazeaux4.62 km²100% commune
- Pont-de-Labeaume4.54 km²100% commune
- Tauriers4.30 km²100% commune
- Fons3.69 km²100% commune
- Vernon3.69 km²100% commune
- Uzer3.57 km²100% commune
- Saint-Cirgues-de-Prades3.53 km²100% commune
- Sagnes-et-Goudoulet3.19 km²13% commune
- Labégude3.15 km²100% commune
- Freyssenet3.05 km²31% commune
- Rocher2.90 km²100% commune
- Mas-d'Orcières2.49 km²7% commune
- Lalevade-d'Ardèche2.48 km²100% commune
- Saint-Didier-sous-Aubenas2.45 km²100% commune
- Le Pont-de-Montvert1.56 km²2% commune
- Saint-Étienne-de-Lugdarès1.53 km²3% commune
- Orgnac-l'Aven1.43 km²7% commune
- Saint-Julien-du-Gua1.16 km²7% commune
- Le Bleymard0.82 km²5% commune
- Saint-Michel-d'Euzet0.79 km²7% commune
- Saint-Paul-le-Jeune0.76 km²5% commune
- Bourg-Saint-Andéol0.73 km²2% commune
- Laveyrune0.60 km²5% commune
- Saint-Andéol-de-Fourchades0.44 km²3% commune
- Concoules0.38 km²2% commune
- Saint-Laurent-de-Carnols0.34 km²4% commune
- Ajoux0.27 km²2% commune
- Chaudeyrac0.27 km²1% commune
- Saint-Priest0.19 km²1% commune
- Saint-Cirgues-en-Montagne0.16 km²1% commune
- Alba-la-Romaine0.13 km²0% commune
- Saint-Julien-du-Tournel0.05 km²0% commune
- Bessas0.04 km²0% commune
- Saint-André-Capcèze0.03 km²0% commune
- Ponteils-et-Brésis0.02 km²0% commune
- Allenc0.02 km²0% commune
- Saint-Martial0.01 km²0% commune
- Marcols-les-Eaux0.01 km²0% commune
- Usclades-et-Rieutord0.01 km²0% commune
- Saint-Alexandre0.00 km²0% commune
- Saint-André-de-Cruzières0.00 km²0% commune
30 intersecting protected areas
Monts D\'Ardèche
IUCN VRegional Nature Park
1081.06 km² overlap
National Park - Buffer zone/Area of adhesion
150.97 km² overlap
Vallées de la Beaume et de la Drobie
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
79.70 km² overlap
Les Cévennes
IUCN Not ReportedSpecial Protection Area (Birds Directive)
63.87 km² overlap
Cévennes
IUCN IINational Park - Core Area
63.84 km² overlap
Basse Ardèche urgonienne
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
62.85 km² overlap
Bois de Païolive et Basse Vallée du Chassezac
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
62.09 km² overlap
Basse Ardèche
IUCN Not ReportedSpecial Protection Area (Birds Directive)
57.90 km² overlap
Moyenne vallée de l'Ardèche, pelouses du plateau des Gras
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
54.12 km² overlap
21 more protected areassorted by overlap area
Plateau de Montselgues
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
39.98 km² overlap
Mont Lozère
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
39.51 km² overlap
Massif De La Dent De Rez
IUCN IVBiotope Protection Order
29.59 km² overlap
Forêt de Valbonne
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
24.31 km² overlap
Gorges De L\'Ardèche
IUCN IVNational Nature Reserve
19.47 km² overlap
Rivière Ardèche
IUCN IVBiotope Protection Order
14.36 km² overlap
Marais des Agusas, montagnes de la Serre et d'Uzègues
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
13.07 km² overlap
Cévennes ardèchoises
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
11.83 km² overlap
Grand Tanargue (Du)
IUCN IaForest Integral Biological Reserve
8.07 km² overlap
Landes et forêts du bois des Bartres
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
5.67 km² overlap
Sources De L\'Ardèche
IUCN IaForest Integral Biological Reserve
4.41 km² overlap
Bois Sauvage
IUCN IaForest Integral Biological Reserve
4.07 km² overlap
Grand Tanargue (Du)
IUCN IVForest Managed Biological Reserve
2.57 km² overlap
Vallée de l'Eyrieux et ses affluents
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.45 km² overlap
Basse Vallée De L\'Ibie
IUCN IVBiotope Protection Order
1.30 km² overlap
Bois Sauvage
IUCN IVForest Managed Biological Reserve
1.01 km² overlap
Milieux alluviaux du Rhône aval
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.71 km² overlap
Secteur des Sucs
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.56 km² overlap
Land acquired by a regional conservatory of natural areas
0.42 km² overlap
Land acquired by a regional conservatory of natural areas
0.36 km² overlap
gras de serre montredon
IUCN IVLand acquired by a regional conservatory of natural areas
0.19 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
11 622 distinct species · 1 025 491 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 26 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'Ardèche : 19 espèces + 7 bulles famille, 55 interactions GloBI documentées sur 5 types (connectance 16.9%, 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°
10,3°C
Annual rain
802mm
Moisture idx (CMI)
-0,10
Runoff
518mm/an
PET
896mm
AET
642mm
Mean slope
12,0°
Water table
484cm
Forest
72%
Crops
22%
Urban
1%
Protected
59%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)