HydroBASINS lev08 watershed · #2080547260
Bassin de la Gresse
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 1 administrative regions : Isère
Sub-basin area
245,9km²
Upstream area
3 560,8km²
Discharge
58,47m³/s
Mean elev.
930m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de la Romanche1237 km²
- Bassin du Drac141 km²
1 dept-equivalent regions (GADM L2)
- 246.4 km²100.0% of basin
28 communes (GADM L5)Available for FRA, RWA
- Gresse-en-Vercors32.56 km²41% commune
- Le Gua28.67 km²99% commune
- Claix23.39 km²100% commune
- Saint-Paul-de-Varces19.28 km²100% commune
- Varces-Allières-et-Risset18.24 km²87% commune
- Château-Bernard17.82 km²100% commune
- Vif14.68 km²53% commune
- Saint-Guillaume13.56 km²100% commune
- Saint-Andéol13.35 km²44% commune
- Saint-Paul-lès-Monestier12.24 km²87% commune
- Miribel-Lanchâtre9.56 km²100% commune
- Saint-Martin-de-la-Cluze8.34 km²51% commune
- Monestier-de-Clermont4.98 km²88% commune
- Seyssins4.80 km²61% commune
- Champagnier4.79 km²72% commune
- Le Pont-de-Claix4.38 km²78% commune
- Sinard3.35 km²30% commune
- Grenoble2.79 km²15% commune
- Villard-de-Lans2.12 km²3% commune
- Corrençon-en-Vercors2.11 km²5% commune
- Lans-en-Vercors2.11 km²5% commune
- Échirolles1.70 km²21% commune
- Seyssinet-Pariset0.69 km²6% commune
- Avignonet0.56 km²6% commune
- Saint-Nizier-du-Moucherotte0.28 km²3% commune
- Jarrie0.06 km²0% commune
- Treffort0.05 km²0% commune
- Saint-Michel-les-Portes0.01 km²0% commune
7 intersecting protected areas
Vercors
IUCN VRegional Nature Park
174.85 km² overlap
Hauts plateaux et contreforts du Vercors oriental
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
14.75 km² overlap
Hauts Plateaux Du Vercors
IUCN IVNational Nature Reserve
2.60 km² overlap
Hauts plateaux du Vercors
IUCN Not ReportedSpecial Protection Area (Birds Directive)
2.60 km² overlap
Isles Du Drac
IUCN IVRegional Nature Reserve
2.13 km² overlap
Colline De Comboire
IUCN IVBiotope Protection Order
1.44 km² overlap
Vercors
IUCN IaForest Integral Biological Reserve
0.46 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
7 058 distinct species · 697 676 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 23 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 Gresse : 16 espèces reliées par 79 interactions GloBI sur 4 types (connectance 26.3%, filtre Serrano α=0.2). 9 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydroclimate (BasinATLAS lev08)
Mean T°
7,9°C
Annual rain
1 036mm
Moisture idx (CMI)
0,19
Runoff
499mm/an
PET
813mm
AET
666mm
Mean slope
18,1°
Water table
575cm
Forest
65%
Crops
6%
Urban
16%
Protected
72%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)