HydroBASINS lev08 watershed · #2080016690
Bassin de l'Orb
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 4 administrative regions : Aude, Aveyron, Hérault, Tarn
Sub-basin area
1 805,6km²
Upstream area
1 805,6km²
Discharge
0,06m³/s
Mean elev.
346m
Administrative coverage
4 dept-equivalent regions (GADM L2)
- 1733.3 km²95.8% of basin
- 70.0 km²3.9% of basin
- 0.7 km²0.0% of basin
- 0.0 km²0.0% of basin
125 communes (GADM L5)Available for FRA, RWA
- Béziers95.35 km²99% commune
- Avène62.21 km²100% commune
- Riols54.27 km²95% commune
- Rosis52.23 km²99% commune
- Joncels46.44 km²100% commune
- Lunas43.67 km²99% commune
- Saint-Pons-de-Thomières40.42 km²100% commune
- Roquebrun39.81 km²100% commune
- Cazouls-lès-Béziers38.33 km²100% commune
- Cessenon-sur-Orb36.87 km²100% commune
- Murviel-lès-Béziers33.07 km²100% commune
- La Tour-sur-Orb31.37 km²100% commune
- Cabrerolles28.57 km²100% commune
- Vias28.40 km²86% commune
- Saint-Nazaire-de-Ladarez28.34 km²100% commune
- Puisserguier28.21 km²100% commune
- Vieussan28.17 km²100% commune
- Courniou27.99 km²93% commune
- Bédarieux27.57 km²100% commune
- Sérignan27.18 km²100% commune
- Ceilhes-et-Rocozels26.95 km²98% commune
- Faugères26.54 km²100% commune
- Ferrières-Poussarou25.94 km²100% commune
- Pardailhan24.58 km²59% commune
- Saint-Gervais-sur-Mare24.26 km²100% commune
- Saint-Chinian23.13 km²100% commune
- Roqueredonde22.58 km²99% commune
- Castanet-le-Haut22.34 km²81% commune
- Saint-Étienne-d'Albagnan22.01 km²100% commune
- Mons21.88 km²100% commune
- Babeau-Bouldoux20.84 km²100% commune
- Les Aires20.32 km²100% commune
- Prades-sur-Vernazobre19.74 km²100% commune
- Le Clapier19.65 km²100% commune
- Portiragnes19.59 km²100% commune
- Saint-Julien19.26 km²99% commune
- Olargues18.77 km²100% commune
- Dio-et-Valquières18.76 km²97% commune
- Causses-et-Veyran17.92 km²100% commune
- Magalas17.79 km²86% commune
- Mélagues17.35 km²39% commune
- Villeneuve-lès-Béziers17.27 km²100% commune
- Cornus16.76 km²18% commune
- Saint-Vincent-d'Olargues16.29 km²100% commune
- Prémian16.25 km²100% commune
- Laurens16.15 km²97% commune
- Montblanc15.03 km²55% commune
- Taussac-la-Billière14.92 km²100% commune
- Corneilhan14.14 km²100% commune
- Fraisse-sur-Agout13.94 km²24% commune
- Thézan-lès-Béziers13.51 km²100% commune
- Camplong13.25 km²100% commune
- Sauvian12.85 km²98% commune
- Cébazan12.80 km²100% commune
- Servian12.51 km²30% commune
- Maraussan12.04 km²100% commune
- Cazedarnes11.94 km²100% commune
- Saint-Geniès-de-Varensal11.89 km²100% commune
- Le Bousquet-d'Orb11.62 km²100% commune
- Pierrerue11.55 km²100% commune
- Autignac11.42 km²100% commune
- Berlou10.61 km²100% commune
- Caussiniojouls10.53 km²100% commune
- Maureilhan10.50 km²97% commune
- Combes10.47 km²100% commune
- Fondamente10.22 km²20% commune
- Cambon-et-Salvergues10.12 km²20% commune
- Montady9.96 km²99% commune
- Colombiers9.81 km²100% commune
- Graissessac9.57 km²100% commune
- Quarante9.19 km²31% commune
- Saint-Geniès-de-Fontedit8.99 km²100% commune
- Hérépian8.76 km²100% commune
- Villemagne-l'Argentière8.37 km²100% commune
- Colombières-sur-Orb8.36 km²100% commune
- Lieuran-lès-Béziers8.34 km²100% commune
- Carlencas-et-Levas8.21 km²78% commune
- Creissan8.20 km²100% commune
- Cers7.92 km²100% commune
- Vendres7.30 km²20% commune
- Puimisson6.83 km²100% commune
- Boujan-sur-Libron6.71 km²100% commune
- Bassan6.64 km²100% commune
- Puissalicon6.08 km²46% commune
- Lamalou-les-Bains6.06 km²100% commune
- Tauriac-de-Camarès5.60 km²23% commune
- Pailhès5.42 km²100% commune
- Le Poujol-sur-Orb4.94 km²100% commune
- Capestang4.57 km²11% commune
- Villespassans3.89 km²28% commune
- Saint-Martin-de-l'Arçon3.83 km²100% commune
- Le Pradal3.57 km²100% commune
- Saint-Étienne-Estréchoux3.49 km²100% commune
- Lignan-sur-Orb3.30 km²100% commune
- Romiguières3.22 km²96% commune
- Assignan3.04 km²37% commune
- Pézènes-les-Mines2.88 km²10% commune
- Valras-Plage2.84 km²100% commune
- Fouzilhon2.73 km²50% commune
- Le Soulié2.59 km²6% commune
- Bessan2.32 km²8% commune
- Verreries-de-Moussans2.16 km²12% commune
- Cruzy1.68 km²6% commune
- Espondeilhan1.56 km²31% commune
- Lespignan1.23 km²5% commune
- Rieussec1.22 km²5% commune
- Nissan-lez-Enserune0.93 km²3% commune
- Roquessels0.92 km²10% commune
- Agde0.79 km²2% commune
- Labastide-Rouairoux0.64 km²3% commune
- Lauroux0.50 km²2% commune
- Arnac-sur-Dourdou0.37 km²2% commune
- Les Plans0.30 km²2% commune
- Gabian0.20 km²1% commune
- Lodève0.19 km²1% commune
- Les Rives0.16 km²1% commune
- Montagnol0.10 km²0% commune
- Octon0.10 km²0% commune
- Poilhes0.08 km²1% commune
- Anglès0.06 km²0% commune
- Lavalette0.05 km²1% commune
- Saint-Jean-de-Minervois0.05 km²0% commune
- Brenas0.03 km²0% commune
- Fleury0.02 km²0% commune
- Saint-Thibéry0.01 km²0% commune
30 intersecting protected areas
Haut-Languedoc
IUCN VRegional Nature Park
1010.83 km² overlap
Grands Causses
IUCN VRegional Nature Park
71.50 km² overlap
Minervois
IUCN Not ReportedSpecial Protection Area (Birds Directive)
60.48 km² overlap
Est et sud de Béziers
IUCN Not ReportedSpecial Protection Area (Birds Directive)
45.15 km² overlap
Montagne de l'Espinouse et du Caroux
IUCN Not ReportedSpecial Protection Area (Birds Directive)
28.56 km² overlap
Le Caroux et l'Espinouse
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
20.49 km² overlap
Plateau et corniches du Guilhaumard
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
18.37 km² overlap
Le Caroux-Espinouse
IUCN IVNational Hunting and Wildlife Reserve
14.85 km² overlap
Crêtes du Mont Marcou et des Monts de Mare
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
14.54 km² overlap
21 more protected areassorted by overlap area
La Grande Maire
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
4.23 km² overlap
Biotope Protection Order
3.23 km² overlap
Côtes sableuses de l'infralittoral Languedocien
IUCN Not ReportedSite of Community Importance (Habitats Directive)
3.06 km² overlap
Basse plaine de l'Aude
IUCN Not ReportedSpecial Protection Area (Birds Directive)
2.26 km² overlap
Les orpellieres
IUCN IVLand acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)
1.80 km² overlap
La grande maire
IUCN IVLand acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)
1.66 km² overlap
Basse plaine de l'Aude
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.66 km² overlap
Roque-Haute
IUCN IVNational Nature Reserve
1.61 km² overlap
Plateau de Roquehaute
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.55 km² overlap
Espinouse
IUCN IVForest Managed Biological Reserve
1.49 km² overlap
Les Orpellières
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.43 km² overlap
Basse plaine de l\'aude
IUCN IVLand acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)
1.06 km² overlap
Le Salagou
IUCN Not ReportedSpecial Protection Area (Birds Directive)
0.91 km² overlap
Grotte de la Rivière Morte
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.89 km² overlap
Causse du Larzac
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.81 km² overlap
Causse du Larzac
IUCN Not ReportedSpecial Protection Area (Birds Directive)
0.81 km² overlap
Cours inférieur de l'Aude
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.61 km² overlap
Côte languedocienne
IUCN Not ReportedSpecial Protection Area (Birds Directive)
0.61 km² overlap
Grotte du Trésor
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.44 km² overlap
Grotte de la source du Jaur
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.30 km² overlap
Grotte de Julio
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.17 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
8 672 distinct species · 562 392 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 28 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'Orb : 20 espèces + 8 bulles famille, 60 interactions GloBI documentées sur 1 type (connectance 15.9%, 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°
12,9°C
Annual rain
722mm
Moisture idx (CMI)
-0,26
Runoff
585mm/an
PET
977mm
AET
603mm
Mean slope
9,4°
Water table
352cm
Forest
60%
Crops
20%
Urban
5%
Protected
60%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)