HydroBASINS lev08 watershed · #7080541110
Bassin de 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 4 administrative regions : Daviess, De Kalb, Gentry, Harrison
Sub-basin area
625km²
Upstream area
3 596,5km²
Discharge
26,53m³/s
Mean elev.
284m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de East Fork Grand River1115 km²
- Bassin de Grand River3 km²
4 dept-equivalent regions (GADM L2)
- 351.0 km²56.1% of basin
- Harrison182.4 km²29.2% of basin
- Daviess82.5 km²13.2% of basin
- De Kalb9.8 km²1.6% of basin
7 intersecting protected areas
Elam Bend
IUCN VConservation Area
6.06 km² overlap
Reserve Program
0.94 km² overlap
Denton (Andy)
IUCN VAccess
0.50 km² overlap
Conservation Easement
0.12 km² overlap
National Wildlife Refuge
0.09 km² overlap
Savage
IUCN VAccess
0.05 km² overlap
Grand Trace
IUCN VConservation Area
0.01 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
263 distinct species · 3 302 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 41 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 Grand River : 31 espèces reliées par 98 interactions GloBI sur 4 types (connectance 11.4%, filtre Serrano α=0.2). 11 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°
10,7°C
Annual rain
901mm
Moisture idx (CMI)
-0,18
Runoff
232mm/an
PET
1 100mm
AET
763mm
Mean slope
1,7°
Water table
131cm
Forest
10%
Crops
70%
Urban
0%
Protected
1%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)