HydroBASINS lev08 watershed · #7080510870
Bassin de St. Joseph 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 : Allen, De Kalb, Defiance, Williams
Sub-basin area
526,8km²
Upstream area
2 070,3km²
Discharge
21,62m³/s
Mean elev.
258m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Fish Creek301 km²
- Bassin de St. Joseph River209 km²
4 dept-equivalent regions (GADM L2)
- De Kalb350.3 km²66.4% of basin
- 90.6 km²17.2% of basin
- 55.7 km²10.6% of basin
- Williams30.9 km²5.9% of basin
8 intersecting protected areas
Reserve Program
0.40 km² overlap
Watershed Protection
0.21 km² overlap
McNabb - Walter
IUCN VNature Preserve
0.19 km² overlap
Reserve Program
0.17 km² overlap
Watershed Protection
0.09 km² overlap
Reserve Program
0.06 km² overlap
Foxfire Woods
IUCN VNature Preserve
0.06 km² overlap
Fish Creek
IUCN VWildlife Area
0.04 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
926 distinct species · 35 302 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 St. Joseph River : 27 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 74 interactions GloBI sur 3 types (connectance 11.7%, filtre Serrano α=0.2). 9 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°
9,2°C
Annual rain
888mm
Moisture idx (CMI)
-0,13
Runoff
312mm/an
PET
1 018mm
AET
745mm
Mean slope
0,6°
Water table
26cm
Forest
0%
Crops
70%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)