HydroBASINS lev08 watershed · #7080620890
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 : Delaware, McDonald, Newton, Ottawa
Sub-basin area
270,7km²
Upstream area
22 996km²
Discharge
202,54m³/s
Mean elev.
284m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Neosho River907 km²
- Bassin de Spring River845 km²
4 dept-equivalent regions (GADM L2)
- OttawaOklahoma · United States201.6 km²74.5% of basin
- Newton50.0 km²18.5% of basin
- 17.1 km²6.3% of basin
- DelawareOklahoma · United States2.1 km²0.8% of basin
2 intersecting protected areas
Ozark Plateau
IUCN IVNational Wildlife Refuge
0.33 km² overlap
Buffalo Hills
IUCN VNatural Area
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
517 distinct species · 3 326 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 46 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 : 35 espèces reliées par 88 interactions GloBI sur 4 types (connectance 8.1%, filtre Serrano α=0.2). 12 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°
14,2°C
Annual rain
1 100mm
Moisture idx (CMI)
-0,13
Runoff
282mm/an
PET
1 258mm
AET
930mm
Mean slope
2,1°
Water table
171cm
Forest
43%
Crops
37%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)