HydroBASINS lev08 watershed · #8080262310
Bassin de Snare-Marian flowline
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
961,2km²
Upstream area
86 059,9km²
Discharge
186,17m³/s
Mean elev.
150m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
1 dept-equivalent regions (GADM L2)
- Fort Smith967.0 km²100.0% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
76 distinct species · 110 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 27 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 Snare-Marian flowline : 24 espèces reliées par 26 interactions GloBI sur 4 types (connectance 7.4%, filtre Serrano α=0.2). 3 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°
-4,4°C
Annual rain
293mm
Moisture idx (CMI)
-0,40
Runoff
56mm/an
PET
485mm
AET
262mm
Mean slope
0,0°
Water table
0cm
Forest
0%
Crops
0%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)