HydroBASINS lev08 watershed · #7080327160
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 : Chouteau, Hill, Liberty
Sub-basin area
455km²
Upstream area
16 604,4km²
Discharge
36,6m³/s
Mean elev.
913m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Cottonwood Creek1147 km²
- Bassin de Marias River31 km²
3 dept-equivalent regions (GADM L2)
- Liberty174.6 km²38.3% of basin
- 155.9 km²34.2% of basin
- 125.8 km²27.6% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
113 distinct species · 403 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 31 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 : 25 espèces reliées par 68 interactions GloBI sur 3 types (connectance 12.9%, filtre Serrano α=0.2). 8 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°
6,4°C
Annual rain
312mm
Moisture idx (CMI)
-0,69
Runoff
82mm/an
PET
1 000mm
AET
274mm
Mean slope
1,5°
Water table
418cm
Forest
3%
Crops
47%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)