HydroBASINS lev08 watershed · #7080582270
Bassin de South Grand 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 1 administrative regions : Henry
Sub-basin area
320,9km²
Upstream area
3 581,1km²
Discharge
34,37m³/s
Mean elev.
239m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Big Creek1372 km²
- Bassin de South Grand River1073 km²
1 dept-equivalent regions (GADM L2)
- Henry321.1 km²100.0% of basin
4 intersecting protected areas
Reservoir
40.66 km² overlap
Poague (Haysler A.)
IUCN VConservation Area
3.60 km² overlap
Reserve Program
0.48 km² overlap
National Wildlife Refuge
0.20 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
829 distinct species · 37 261 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 37 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 South Grand River : 28 espèces reliées par 75 interactions GloBI sur 4 types (connectance 11.3%, 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°
12,6°C
Annual rain
1 042mm
Moisture idx (CMI)
-0,13
Runoff
322mm/an
PET
1 198mm
AET
881mm
Mean slope
0,7°
Water table
53cm
Forest
10%
Crops
54%
Urban
3%
Protected
14%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)