HydroBASINS lev08 watershed · #7080371200
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, Idaho, Ravalli
Sub-basin area
2 253,1km²
Upstream area
4 751,3km²
Discharge
27,14m³/s
Mean elev.
1 785m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
3 dept-equivalent regions (GADM L2)
- 2247.8 km²99.5% of basin
- 5.7 km²0.3% of basin
- IdahoIdaho · United States5.3 km²0.2% of basin
6 intersecting protected areas
Selway-Bitterroot
IUCN IbWilderness
651.54 km² overlap
Sapphire
IUCN IbWilderness Study Area
92.70 km² overlap
Research Natural Area
7.23 km² overlap
Lower Lost Horse Canyon
IUCN IaResearch Natural Area
6.32 km² overlap
Upper Lost Horse Canyon
IUCN IaResearch Natural Area
6.20 km² overlap
Sapphire Divide
IUCN IaResearch Natural Area
2.03 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 361 distinct species · 83 068 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 Bitterroot River : 23 espèces reliées par 76 interactions GloBI sur 4 types (connectance 11.4%, 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°
3,1°C
Annual rain
466mm
Moisture idx (CMI)
-0,45
Runoff
234mm/an
PET
879mm
AET
400mm
Mean slope
16,9°
Water table
976cm
Forest
76%
Crops
7%
Urban
0%
Protected
29%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)