HydroBASINS lev08 watershed · #7080301840
Bassin de Saint Mary 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 across 2 countries : Division No. 3, Flathead, Glacier
Sub-basin area
1 337,4km²
Upstream area
1 337,4km²
Discharge
6,6m³/s
Mean elev.
1 702m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
3 dept-equivalent regions (GADM L2)
- 1107.5 km²82.6% of basin
- 232.6 km²17.3% of basin
- 1.5 km²0.1% of basin
17 intersecting protected areas
Waterton Glacier International Peace
IUCN Not ApplicableUNESCO-MAB Biosphere Reserve
718.87 km² overlap
Glacier
IUCN IINational Park
674.37 km² overlap
Waterton Glacier International Peace Park
IUCN Not ApplicableWorld Heritage Site (natural or mixed)
674.37 km² overlap
Glacier Proposed or Recom
IUCN IbRecommended Wilderness
612.99 km² overlap
Waterton Lakes National Park
IUCN Not ApplicableUNESCO-MAB Biosphere Reserve
17.04 km² overlap
Glacier County
IUCN VWaterfowl Production Area
13.27 km² overlap
Provincial Park
2.13 km² overlap
DUC Fee Simple Lands
IUCN IVOwnership by Environmental Non-Governmental Organization
2.00 km² overlap
Natural Area
0.73 km² overlap
8 more protected areassorted by overlap area
SALTS 058
IUCN Not ApplicableConservation easement
0.60 km² overlap
DUC Fee Simple Lands
IUCN IVOwnership by Environmental Non-Governmental Organization
0.50 km² overlap
SALTS 042
IUCN Not ApplicableConservation easement
0.45 km² overlap
Privately Protected Area
0.30 km² overlap
DUC Fee Simple Lands
IUCN IVOwnership by Environmental Non-Governmental Organization
0.25 km² overlap
DUC Fee Simple Lands
IUCN IVOwnership by Environmental Non-Governmental Organization
0.14 km² overlap
DUC Fee Simple Lands
IUCN IVOwnership by Environmental Non-Governmental Organization
0.03 km² overlap
DUC Fee Simple Lands
IUCN IVOwnership by Environmental Non-Governmental Organization
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 537 distinct species · 110 375 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 Saint Mary River : 21 espèces reliées par 70 interactions GloBI sur 4 types (connectance 12.5%, filtre Serrano α=0.2). 13 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°
2,4°C
Annual rain
584mm
Moisture idx (CMI)
-0,21
Runoff
326mm/an
PET
756mm
AET
479mm
Mean slope
13,3°
Water table
549cm
Forest
68%
Crops
18%
Urban
0%
Protected
50%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)