HydroBASINS lev08 watershed · #2080556690
Bassin de la Drôme
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 : Drôme, Hautes-Alpes, Isère
Sub-basin area
1 662,5km²
Upstream area
1 662,5km²
Discharge
22,29m³/s
Mean elev.
785m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
3 dept-equivalent regions (GADM L2)
- 1645.5 km²98.8% of basin
- 18.5 km²1.1% of basin
- 2.1 km²0.1% of basin
111 communes (GADM L5)Available for FRA, RWA
- Treschenu-Creyers78.86 km²96% commune
- Die57.60 km²100% commune
- Boulc57.06 km²100% commune
- Glandage52.58 km²99% commune
- Saint-Julien-en-Quint47.07 km²100% commune
- Saint-Nazaire-le-Désert45.96 km²99% commune
- Romeyer40.28 km²100% commune
- Valdrôme39.39 km²96% commune
- Grane38.98 km²85% commune
- Menglon36.52 km²100% commune
- Omblèze34.64 km²76% commune
- Gigors-et-Lozeron33.67 km²93% commune
- Montclar-sur-Gervanne30.20 km²100% commune
- Châtillon-en-Diois28.14 km²100% commune
- Aucelon27.15 km²100% commune
- Aurel26.78 km²100% commune
- Eygluy-Escoulin26.30 km²100% commune
- Beaurières25.37 km²98% commune
- Piégros-la-Clastre24.22 km²98% commune
- Crest23.25 km²100% commune
- Luc-en-Diois23.03 km²100% commune
- Véronne21.96 km²100% commune
- Chamaloc20.98 km²96% commune
- Val-Maravel20.93 km²99% commune
- Laval-d'Aix20.56 km²100% commune
- Pontaix19.61 km²100% commune
- Lesches-en-Diois19.54 km²100% commune
- Chalancon19.35 km²55% commune
- Plan-de-Baix19.18 km²100% commune
- Marignac-en-Diois18.52 km²100% commune
- Eurre18.50 km²100% commune
- Chabrillan18.05 km²100% commune
- Vaunaveys-la-Rochette17.68 km²79% commune
- Mirabel-et-Blacons17.66 km²100% commune
- Aouste-sur-Sye17.65 km²100% commune
- Beaumont-en-Diois17.32 km²99% commune
- Volvent16.79 km²100% commune
- Allex16.73 km²81% commune
- Chichilianne16.54 km²27% commune
- Aix-en-Diois16.43 km²100% commune
- Saillans16.01 km²100% commune
- Les Prés15.92 km²100% commune
- Jonchères15.70 km²97% commune
- Barsac15.52 km²100% commune
- Brette15.39 km²100% commune
- Espenel14.70 km²100% commune
- Suze14.51 km²100% commune
- Saint-Andéol13.59 km²100% commune
- Ponet-et-Saint-Auban13.49 km²100% commune
- Chastel-Arnaud13.42 km²100% commune
- Divajeu13.39 km²100% commune
- Pradelle13.25 km²100% commune
- Loriol-sur-Drôme13.09 km²46% commune
- Poyols13.06 km²100% commune
- Montmaur-en-Diois12.75 km²100% commune
- La Répara-Auriples12.59 km²84% commune
- La Chaudière12.53 km²99% commune
- Charens12.40 km²100% commune
- Recoubeau-Jansac12.38 km²100% commune
- Barnave12.24 km²100% commune
- Rochefourchat12.07 km²99% commune
- Miscon12.01 km²100% commune
- Rimon-et-Savel11.99 km²100% commune
- Le Chaffal11.89 km²99% commune
- Saint-Benoit-en-Diois11.48 km²100% commune
- Cobonne11.37 km²100% commune
- Vercheny11.32 km²100% commune
- Sainte-Croix10.83 km²100% commune
- La Bâtie-des-Fonds10.58 km²91% commune
- La Roche-sur-Grane10.11 km²82% commune
- Livron-sur-Drôme10.09 km²25% commune
- Montlaur-en-Diois9.49 km²100% commune
- Beaufort-sur-Gervanne9.23 km²100% commune
- Pennes-le-Sec8.63 km²100% commune
- Gumiane8.61 km²99% commune
- Saint-Sauveur-en-Diois7.16 km²100% commune
- Saint-Roman7.02 km²100% commune
- Autichamp6.30 km²100% commune
- Aubenasson6.03 km²98% commune
- Soyans5.67 km²22% commune
- Arnayon5.59 km²28% commune
- Vachères-en-Quint5.36 km²100% commune
- Bouvante4.07 km²5% commune
- Combovin4.03 km²11% commune
- Saint-Agnan-en-Vercors3.69 km²4% commune
- Vassieux-en-Vercors3.64 km²8% commune
- Léoncel3.55 km²8% commune
- Saou3.29 km²8% commune
- Upie3.17 km²16% commune
- Molières-Glandaz2.64 km²100% commune
- Gresse-en-Vercors1.79 km²2% commune
- Bellegarde-en-Diois1.25 km²5% commune
- Lus-la-Croix-Haute0.89 km²1% commune
- Montbrand0.76 km²3% commune
- La Beaume0.54 km²2% commune
- Bouvières0.49 km²2% commune
- Chaudebonne0.41 km²2% commune
- Saint-Dizier-en-Diois0.29 km²2% commune
- Cliousclat0.27 km²3% commune
- Les Tonils0.27 km²2% commune
- Saint-Julien-en-Beauchêne0.25 km²0% commune
- La Piarre0.23 km²1% commune
- L'Épine0.19 km²1% commune
- Châteaudouble0.17 km²1% commune
- Montmorin0.11 km²0% commune
- Saint-Maurice-en-Trièves0.08 km²1% commune
- Ourches0.07 km²1% commune
- Percy0.04 km²0% commune
- Bézaudun-sur-Bîne0.03 km²0% commune
- Lalley0.02 km²0% commune
- La Haute-Beaume0.02 km²0% commune
27 intersecting protected areas
Vercors
IUCN VRegional Nature Park
553.68 km² overlap
Gervanne et rebord occidental du Vercors
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
137.19 km² overlap
Hauts plateaux et contreforts du Vercors oriental
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
64.26 km² overlap
Hauts Plateaux Du Vercors
IUCN IVNational Nature Reserve
48.68 km² overlap
Hauts plateaux du Vercors
IUCN Not ReportedSpecial Protection Area (Birds Directive)
48.68 km² overlap
Rebord méridional du Vercors
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
31.84 km² overlap
Baronnies Provençales
IUCN VRegional Nature Park
21.58 km² overlap
Natural habitats protection Order
15.84 km² overlap
Massif de Saoû et crêtes de La Tour
IUCN Not ReportedSpecial Protection Area (Birds Directive)
15.21 km² overlap
18 more protected areassorted by overlap area
Pelouses, landes, falaises et forêts de la montagne d'Aucelon
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
14.76 km² overlap
Grotte à chauves-souris des Sadoux
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
13.14 km² overlap
Milieux alluviaux et aquatiques et gorges de la moyenne vallée de la Drôme et du Bez
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
11.60 km² overlap
Archiane
IUCN IVForest Managed Biological Reserve
7.38 km² overlap
Special Areas of Conservation (Habitats Directive)
4.39 km² overlap
Milieux aquatiques et alluviaux de la basse vallée de la Drôme
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
3.70 km² overlap
Les Ramières du Val de Drôme
IUCN Not ReportedSpecial Protection Area (Birds Directive)
3.64 km² overlap
Pelouses, forêts et grottes du massif de Saoû
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
3.24 km² overlap
Ramières Du Val De Drôme
IUCN IVNational Nature Reserve
3.06 km² overlap
Zones humides et rivière de la haute vallée de la Drôme
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.64 km² overlap
Milieux alluviaux du Rhône aval
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.88 km² overlap
Ensemble Des Freydières
IUCN IVBiotope Protection Order
0.58 km² overlap
Baronnies - gorges de l'Eygues
IUCN Not ReportedSpecial Protection Area (Birds Directive)
0.37 km² overlap
Grotte Des Sadoux
IUCN IVRegional Nature Reserve
0.31 km² overlap
Printegarde
IUCN Not ReportedSpecial Protection Area (Birds Directive)
0.26 km² overlap
les ayasses
IUCN IVLand acquired by a regional conservatory of natural areas
0.20 km² overlap
Land acquired by a regional conservatory of natural areas
0.04 km² overlap
chenaie de boiffis
IUCN IVLand acquired by a regional conservatory of natural areas
0.01 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
7 789 distinct species · 738 896 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 42 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 Drôme : 39 espèces + 3 bulles famille, 74 interactions GloBI documentées sur 6 types (connectance 8.6%, filtre Serrano α=0.2). Les 3 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°
8,9°C
Annual rain
957mm
Moisture idx (CMI)
0,10
Runoff
420mm/an
PET
846mm
AET
663mm
Mean slope
16,0°
Water table
554cm
Forest
77%
Crops
13%
Urban
1%
Protected
34%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)