HydroBASINS lev08 watershed · #7080416240
Bassin de Madison 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 : Fremont, Gallatin, Madison
Sub-basin area
558,7km²
Upstream area
2 831,4km²
Discharge
28,5m³/s
Mean elev.
2 394m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Grayling Creek657 km²
- Bassin de Madison River11 km²
3 dept-equivalent regions (GADM L2)
- Madison279.8 km²50.0% of basin
- Gallatin279.2 km²49.9% of basin
- FremontIdaho · United States0.9 km²0.2% of basin
4 intersecting protected areas
Lee Metcalf
IUCN IbWilderness
104.76 km² overlap
Olliffe Ranch
IUCN VConservation Easement
6.32 km² overlap
Streamside Zone Withdrawal
0.52 km² overlap
Targhee Creek
IUCN IaResearch Natural Area
0.27 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
801 distinct species · 19 098 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 39 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 Madison River : 30 espèces reliées par 81 interactions GloBI sur 6 types (connectance 10.4%, 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°
-0,1°C
Annual rain
676mm
Moisture idx (CMI)
-0,09
Runoff
314mm/an
PET
757mm
AET
516mm
Mean slope
14,9°
Water table
533cm
Forest
91%
Crops
1%
Urban
0%
Protected
19%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)