HydroBASINS lev08 watershed · #7080146860
Bassin de Grass River
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 : Division No. 22
Sub-basin area
452km²
Upstream area
11 105,2km²
Discharge
39,92m³/s
Mean elev.
229m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Grass River235 km²
- Bassin de Grass River20 km²
1 dept-equivalent regions (GADM L2)
- 454.1 km²100.0% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
304 distinct species · 4 091 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 37 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 Grass River : 25 espèces reliées par 72 interactions GloBI sur 4 types (connectance 10.8%, filtre Serrano α=0.2). 12 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°
-2,3°C
Annual rain
483mm
Moisture idx (CMI)
-0,20
Runoff
129mm/an
PET
603mm
AET
411mm
Mean slope
1,2°
Water table
20cm
Forest
72%
Crops
0%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)