Rivière· 16 segments
Le Viaur
Crosses 3 administrative regions : Aveyron, Tarn, Tarn-et-Garonne
Total length
171km
Max discharge
19,2m³/s
Max Strahler
4
Segments matched
16
River geography3 admin regions · 25 communes
3 administrative regions crossed (GADM L2)
- AveyronOccitanie · France66.2 kmin this dpt
- TarnOccitanie · France18.5 kmin this dpt
- Tarn-et-GaronneOccitanie · France0.2 kmin this dpt
25 communes (L5)For countries with L5
- Pont-de-Salars8.48 km
- Sainte-Juliette-sur-Viaur7.54 km
- Flavin7.51 km
- Camjac6.03 km
- Pampelonne5.82 km
- Saint-Just-sur-Viaur5.75 km
- Centrès4.63 km
- Comps-la-Grand-Ville4.59 km
- Mirandol-Bourgnounac4.39 km
- Crespin4.38 km
- La Salvetat-Peyralès3.56 km
- Tanus2.86 km
- Ségur2.71 km
- Montirat2.49 km
- Tauriac-de-Naucelle2.41 km
- Camboulazet2.40 km
- Saint-Martin-Laguépie2.40 km
- Cassagnes-Bégonhès2.33 km
- Calmont1.55 km
- Saint-André-de-Najac1.50 km
- Trémouilles0.79 km
- Jouqueviel0.49 km
- Laguépie0.21 km
- Saint-Christophe0.00 km
- Lescure-Jaoul0.00 km
3 intersecting protected areas
Grands Causses
IUCN VRegional Nature Park
Vallées du Tarn, de l'Aveyron, du Viaur, de l'Agout et du Gijou
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
Biotope Protection Order
1 page = 1 named river (aggregation of 16 HydroRIVERS v10 segments). Spatial join cached after first hit.
Species present
3 253 distinct species · 77 529 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 40 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 Le Viaur : 36 espèces + 4 bulles famille, 69 interactions GloBI documentées sur 5 types (connectance 8.8%, 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).
Hydrology (HydroRIVERS v10)
Total length
171km
Max discharge
19,2m³/s
Max Strahler
4
Segments matched
16
HydroRIVERS v1.0 (Lehner et al. 2019) aggregated by name + main_riv → 1 entity = 1 named river.