HydroBASINS lev08 watershed · #8080231140
Bassin de Big 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 2 administrative regions : Bethel, Yukon-Koyukuk
Sub-basin area
1 934,5km²
Upstream area
2 648,3km²
Discharge
39,79m³/s
Mean elev.
528m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Big River378 km²
- Bassin de Lyman Fork Big River336 km²
2 dept-equivalent regions (GADM L2)
- 1414.0 km²72.7% of basin
- 532.2 km²27.3% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
266 distinct species · 532 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 20 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 Big River : 12 espèces reliées par 32 interactions GloBI sur 3 types (connectance 16.8%, filtre Serrano α=0.2). 8 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°
-3,8°C
Annual rain
458mm
Moisture idx (CMI)
-0,02
Runoff
502mm/an
PET
470mm
AET
360mm
Mean slope
8,5°
Water table
175cm
Forest
6%
Crops
0%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)