HydroBASINS lev08 watershed · #7080334130
Bassin de South Fork Flathead 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 : Flathead
Sub-basin area
110,1km²
Upstream area
2 416,9km²
Discharge
41,8m³/s
Mean elev.
1 578m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de South Fork Flathead River718 km²
- Bassin de Gorge Creek272 km²
1 dept-equivalent regions (GADM L2)
- 110.5 km²100.0% of basin
2 intersecting protected areas
Bob Marshall
IUCN IbWilderness
32.63 km² overlap
Flathead, Montana
IUCN VWild and Scenic River
10.91 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
127 distinct species · 328 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 43 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 South Fork Flathead River : 29 espèces reliées par 92 interactions GloBI sur 4 types (connectance 10.2%, filtre Serrano α=0.2). 14 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°
3,6°C
Annual rain
685mm
Moisture idx (CMI)
-0,16
Runoff
655mm/an
PET
819mm
AET
550mm
Mean slope
17,2°
Water table
531cm
Forest
92%
Crops
0%
Urban
0%
Protected
40%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)