HydroBASINS lev08 watershed · #8080153910
Bassin de Tilchuse 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 : Fort Smith
Sub-basin area
731,2km²
Upstream area
43 725,6km²
Discharge
177,35m³/s
Mean elev.
175m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin · #8080153050420 km²
- Bassin · #8080152970274 km²
1 dept-equivalent regions (GADM L2)
- Fort Smith736.2 km²100.0% of basin
2 intersecting protected areas
Caribou Point
IUCN Not ApplicableConservation zone in regional land use plan
62.69 km² overlap
Sentinel Islands
IUCN Not ApplicableConservation zone in regional land use plan
56.65 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
120 distinct species · 205 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 25 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 Tilchuse River : 16 espèces reliées par 37 interactions GloBI sur 3 types (connectance 12.3%, 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°
-7,0°C
Annual rain
234mm
Moisture idx (CMI)
-0,39
Runoff
183mm/an
PET
382mm
AET
218mm
Mean slope
1,3°
Water table
32cm
Forest
1%
Crops
0%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)