HydroBASINS lev08 watershed · #7080320920
Bassin de Marias 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 : Glacier, Pondera, Toole
Sub-basin area
211km²
Upstream area
6 715,8km²
Discharge
29,51m³/s
Mean elev.
1 076m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Cut Bank Creek121 km²
- Bassin de Two Medicine River15 km²
3 dept-equivalent regions (GADM L2)
- 98.8 km²46.7% of basin
- 92.7 km²43.8% of basin
- 20.0 km²9.5% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
256 distinct species · 1 278 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 28 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 Marias River : 15 espèces reliées par 106 interactions GloBI sur 4 types (connectance 26.1%, 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°
5,7°C
Annual rain
296mm
Moisture idx (CMI)
-0,67
Runoff
52mm/an
PET
912mm
AET
265mm
Mean slope
2,9°
Water table
559cm
Forest
18%
Crops
38%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)