HydroBASINS lev08 watershed · #7080392440
Bassin de North Fork Big Hole 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 3 administrative regions : Beaverhead, Lemhi, Ravalli
Sub-basin area
883,9km²
Upstream area
884,1km²
Discharge
1,75m³/s
Mean elev.
2 104m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
3 dept-equivalent regions (GADM L2)
- 881.0 km²99.4% of basin
- 4.6 km²0.5% of basin
- LemhiIdaho · United States0.3 km²0.0% of basin
2 intersecting protected areas
Big Hole River
IUCN VEasement
52.04 km² overlap
Anaconda Pintler
IUCN IbWilderness
43.88 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
880 distinct species · 8 531 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 38 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 North Fork Big Hole River : 23 espèces reliées par 126 interactions GloBI sur 5 types (connectance 16.2%, filtre Serrano α=0.2). 17 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°
1,3°C
Annual rain
400mm
Moisture idx (CMI)
-0,52
Runoff
114mm/an
PET
840mm
AET
350mm
Mean slope
8,5°
Water table
820cm
Forest
78%
Crops
4%
Urban
0%
Protected
5%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)