HydroBASINS lev08 watershed · #2080550460
Bassin de la Vernaison
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 2 administrative regions : Drôme, Isère
Sub-basin area
790,9km²
Upstream area
790,9km²
Discharge
10,56m³/s
Mean elev.
1 090m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
2 dept-equivalent regions (GADM L2)
- 456.8 km²57.6% of basin
- 335.9 km²42.4% of basin
46 communes (GADM L5)Available for FRA, RWA
- Bouvante81.07 km²95% commune
- Saint-Agnan-en-Vercors81.07 km²96% commune
- Villard-de-Lans65.54 km²97% commune
- La Chapelle-en-Vercors46.14 km²100% commune
- Vassieux-en-Vercors43.89 km²92% commune
- Autrans39.50 km²89% commune
- Corrençon-en-Vercors36.79 km²95% commune
- Gresse-en-Vercors35.35 km²45% commune
- Léoncel33.48 km²77% commune
- Méaudre32.38 km²97% commune
- Saint-Jean-en-Royans28.25 km²99% commune
- Saint-Laurent-en-Royans27.58 km²100% commune
- Rencurel27.20 km²77% commune
- Saint-Martin-en-Vercors26.88 km²100% commune
- Presles21.26 km²84% commune
- Saint-Julien-en-Vercors18.38 km²100% commune
- Lans-en-Vercors16.85 km²43% commune
- Saint-Andéol16.69 km²56% commune
- Oriol-en-Royans15.39 km²97% commune
- Châtelus12.52 km²100% commune
- Échevis11.24 km²100% commune
- Choranche11.07 km²100% commune
- Omblèze10.84 km²24% commune
- Rochechinard9.89 km²96% commune
- Sainte-Eulalie-en-Royans5.79 km²100% commune
- Saint-André-en-Royans5.40 km²52% commune
- Saint-Thomas-en-Royans5.19 km²100% commune
- Auberives-en-Royans4.90 km²95% commune
- La Motte-Fanjas4.75 km²100% commune
- Saint-Martin-le-Colonel3.09 km²100% commune
- Pont-en-Royans3.00 km²100% commune
- Saint-Pierre-de-Chérennes2.96 km²24% commune
- Saint-Nazaire-en-Royans2.68 km²78% commune
- Saint-Just-de-Claix2.62 km²22% commune
- Chamaloc0.82 km²4% commune
- Engins0.69 km²3% commune
- Chichilianne0.50 km²1% commune
- Izeron0.49 km²3% commune
- Hostun0.18 km²1% commune
- Le Chaffal0.16 km²1% commune
- Le Gua0.15 km²1% commune
- Barbières0.03 km²0% commune
- Saint-Paul-de-Varces0.02 km²0% commune
- Rochefort-Samson0.02 km²0% commune
- Saint-Gervais0.01 km²0% commune
- La Baume-d'Hostun0.00 km²0% commune
15 intersecting protected areas
Vercors
IUCN VRegional Nature Park
792.32 km² overlap
Hauts plateaux et contreforts du Vercors oriental
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
92.28 km² overlap
Hauts plateaux du Vercors
IUCN Not ReportedSpecial Protection Area (Birds Directive)
91.49 km² overlap
Hauts Plateaux Du Vercors
IUCN IVNational Nature Reserve
91.49 km² overlap
La Bourne
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
27.59 km² overlap
Vercors
IUCN IaForest Integral Biological Reserve
21.13 km² overlap
Monts du matin, combe Laval et val Sainte-Marie
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
16.11 km² overlap
Rebord méridional du Vercors
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
15.45 km² overlap
Gervanne et rebord occidental du Vercors
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
8.42 km² overlap
6 more protected areassorted by overlap area
Val Sainte Marie
IUCN IaForest Integral Biological Reserve
1.30 km² overlap
Plaine D\'Herbouilly
IUCN IVBiotope Protection Order
0.91 km² overlap
Special Areas of Conservation (Habitats Directive)
0.57 km² overlap
Engins
IUCN IaForest Integral Biological Reserve
0.20 km² overlap
Grotte De Bournillon
IUCN IVBiotope Protection Order
0.14 km² overlap
Les Ecouges
IUCN IaForest Integral Biological Reserve
0.01 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
6 970 distinct species · 574 071 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 35 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 Vernaison : 31 espèces + 4 bulles famille, 54 interactions GloBI documentées sur 6 types (connectance 9.1%, 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°
7,1°C
Annual rain
1 083mm
Moisture idx (CMI)
0,27
Runoff
470mm/an
PET
772mm
AET
662mm
Mean slope
14,4°
Water table
544cm
Forest
91%
Crops
4%
Urban
0%
Protected
100%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)