HydroBASINS lev08 watershed · #7080409280
Bassin de Saint Croix 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 4 administrative regions : Chisago, Polk, Saint Croix, Washington
Sub-basin area
597,3km²
Upstream area
16 485,8km²
Discharge
131,31m³/s
Mean elev.
288m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Trade River482 km²
- Bassin de Trade River50 km²
4 dept-equivalent regions (GADM L2)
- Polk296.6 km²49.5% of basin
- 201.5 km²33.7% of basin
- Washington77.1 km²12.9% of basin
- 23.5 km²3.9% of basin
21 intersecting protected areas
Lower Saint Croix
IUCN VNational Scenic Riverway
17.65 km² overlap
Scenic
IUCN Not AssignedEasement
4.52 km² overlap
Saint Croix
IUCN VNational Scenic Riverway
3.61 km² overlap
St Croix Islands
IUCN VWildlife Area
2.52 km² overlap
Saint Croix
IUCN VNational Scenic Riverway
2.45 km² overlap
Scenic
IUCN Not AssignedEasement
1.98 km² overlap
Natural Area - Dedication
IUCN Not AssignedConservation Easement
1.68 km² overlap
Scenic
IUCN Not AssignedEasement
1.54 km² overlap
Natural Area - Dedication
IUCN Not AssignedConservation Easement
1.44 km² overlap
12 more protected areassorted by overlap area
Natural Area
0.56 km² overlap
Lower St. Croix
IUCN VNational Scenic Riverway
0.48 km² overlap
National Wildlife Refuge
0.35 km² overlap
Natural Area
0.35 km² overlap
Big Stone County
IUCN VWaterfowl Production Area
0.32 km² overlap
St. Croix
IUCN VNational Scenic Riverway
0.22 km² overlap
Rutstrum
IUCN VState Wildlife Management Area
0.10 km² overlap
Pope County
IUCN VWaterfowl Production Area
0.03 km² overlap
Statewide Habitat Areas
IUCN VHabitat Area
0.02 km² overlap
Easement
0.01 km² overlap
Reserve Program
0.00 km² overlap
Saint Croix
IUCN VINational Scenic Riverway
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
3 237 distinct species · 192 713 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 36 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 Croix River : 24 espèces reliées par 70 interactions GloBI sur 4 types (connectance 10.5%, 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°
6,1°C
Annual rain
779mm
Moisture idx (CMI)
-0,14
Runoff
247mm/an
PET
902mm
AET
659mm
Mean slope
2,0°
Water table
109cm
Forest
46%
Crops
36%
Urban
0%
Protected
10%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)