HydroBASINS lev08 watershed · #7080331350
Bassin de Swan 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 : Flathead, Lake, Missoula
Sub-basin area
1 943,3km²
Upstream area
1 943,3km²
Discharge
34,14m³/s
Mean elev.
1 501m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
3 dept-equivalent regions (GADM L2)
- Lake1003.5 km²51.5% of basin
- 794.3 km²40.8% of basin
- 151.1 km²7.8% of basin
19 intersecting protected areas
Mission Mountains
IUCN IbWilderness
300.56 km² overlap
Swan River
IUCN Not AssignedConservation Easement
19.73 km² overlap
West Swan Valley
IUCN Not AssignedConservation Easement
18.11 km² overlap
Jewel Basin
IUCN VRecreation Area
11.86 km² overlap
Swan River
IUCN IVNational Wildlife Refuge
7.82 km² overlap
Bob Marshall
IUCN IbWilderness
6.87 km² overlap
Mission Mountains Tribal
IUCN IbWilderness
4.71 km² overlap
Swan River
IUCN IaResearch Natural Area
2.73 km² overlap
Swan Valley Macrosite
IUCN VEasement
2.21 km² overlap
10 more protected areassorted by overlap area
Swan River Oxbow Fee
IUCN VPrivate Conservation Land
1.59 km² overlap
Conservation Easement
1.30 km² overlap
Waterfowl Production Area
1.26 km² overlap
Rumble Creek
IUCN VEasement
1.05 km² overlap
Swan Watershed
IUCN VWatershed
0.81 km² overlap
Flathead County
IUCN VIWaterfowl Production Area
0.44 km² overlap
Lindbergh Lake Pines Fee
IUCN VLake
0.16 km² overlap
Reserve Program
0.11 km² overlap
Simmons Meadow
IUCN Not AssignedConservation Easement
0.10 km² overlap
East Shore
IUCN IaResearch Natural Area
0.10 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 307 distinct species · 76 547 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 37 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 Swan River : 28 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 85 interactions GloBI sur 4 types (connectance 12.1%, filtre Serrano α=0.2). 10 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°
3,9°C
Annual rain
676mm
Moisture idx (CMI)
-0,18
Runoff
550mm/an
PET
837mm
AET
536mm
Mean slope
13,4°
Water table
497cm
Forest
91%
Crops
0%
Urban
0%
Protected
17%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)