HydroBASINS lev08 watershed · #7080342850
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 3 administrative regions : Lewis and Clark, Missoula, Powell
Sub-basin area
449km²
Upstream area
1 095,4km²
Discharge
13,85m³/s
Mean elev.
1 902m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Danaher Creek336 km²
- Bassin de Youngs Creek311 km²
3 dept-equivalent regions (GADM L2)
- Powell410.6 km²91.2% of basin
- 39.6 km²8.8% of basin
- 0.1 km²0.0% of basin
2 intersecting protected areas
Bob Marshall
IUCN IbWilderness
449.36 km² overlap
Flathead, Montana
IUCN VWild and Scenic River
19.30 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
327 distinct species · 497 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 33 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 : 28 espèces reliées par 59 interactions GloBI sur 3 types (connectance 10.5%, filtre Serrano α=0.2). 6 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°
2,2°C
Annual rain
648mm
Moisture idx (CMI)
-0,16
Runoff
453mm/an
PET
782mm
AET
528mm
Mean slope
19,2°
Water table
708cm
Forest
94%
Crops
0%
Urban
0%
Protected
100%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)