HydroBASINS lev08 watershed · #7080441730
Bassin de Black 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 : La Crosse, Trempealeau, Winona
Sub-basin area
75,6km²
Upstream area
5 918,8km²
Discharge
53,88m³/s
Mean elev.
212m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Black River826 km²
- Bassin de Beaver Creek406 km²
3 dept-equivalent regions (GADM L2)
- 60.8 km²80.3% of basin
- 14.9 km²19.7% of basin
- 0.0 km²0.0% of basin
6 intersecting protected areas
Wildlife And Fish Refuge
13.21 km² overlap
Wetland of International Importance (Ramsar Site)
13.16 km² overlap
Van Loon
IUCN VWildlife Area
9.09 km² overlap
Refuge
3.25 km² overlap
New Amsterdam Grasslands
IUCN VLocal Conservation Area
1.27 km² overlap
Holland Sand Prairie
IUCN VState Natural Area
0.25 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
703 distinct species · 13 343 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 43 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 Black River : 29 espèces reliées par 123 interactions GloBI sur 4 types (connectance 12.4%, filtre Serrano α=0.2). 16 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°
7,5°C
Annual rain
804mm
Moisture idx (CMI)
-0,15
Runoff
245mm/an
PET
946mm
AET
681mm
Mean slope
1,2°
Water table
71cm
Forest
44%
Crops
59%
Urban
6%
Protected
30%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)