HydroBASINS lev08 watershed · #7080364420
Bassin de Bitterroot 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 : Granite, Missoula, Ravalli
Sub-basin area
409,7km²
Upstream area
6 366,1km²
Discharge
38,54m³/s
Mean elev.
1 450m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
3 dept-equivalent regions (GADM L2)
- 217.2 km²52.9% of basin
- 193.2 km²47.0% of basin
- 0.4 km²0.1% of basin
4 intersecting protected areas
Selway-Bitterroot
IUCN IbWilderness
54.56 km² overlap
Lee Metcalf
IUCN IVNational Wildlife Refuge
1.48 km² overlap
Carlton Ridge
IUCN IaResearch Natural Area
0.35 km² overlap
Welcome Creek
IUCN IbWilderness
0.07 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
3 656 distinct species · 161 286 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 Bitterroot River : 22 espèces reliées par 78 interactions GloBI sur 3 types (connectance 14.8%, filtre Serrano α=0.2). 11 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°
4,6°C
Annual rain
425mm
Moisture idx (CMI)
-0,52
Runoff
244mm/an
PET
916mm
AET
363mm
Mean slope
12,4°
Water table
786cm
Forest
47%
Crops
10%
Urban
0%
Protected
14%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)