HydroBASINS lev08 watershed · #7080487990
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 6 administrative regions : Ashtabula, Geauga, Lake, Lake Erie, Portage +1
Sub-basin area
2 117,9km²
Upstream area
2 117,9km²
Discharge
25,58m³/s
Mean elev.
278m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
6 dept-equivalent regions (GADM L2)
- 876.5 km²41.3% of basin
- 383.5 km²18.1% of basin
- 354.3 km²16.7% of basin
- 252.0 km²11.9% of basin
- Lake243.8 km²11.5% of basin
- 10.7 km²0.5% of basin
30 intersecting protected areas
Grand River
IUCN VWildlife Area
30.69 km² overlap
Mosquito Creek
IUCN VWildlife Area
20.08 km² overlap
Morgan Swamp Fee
IUCN VPrivate Conservation Land
6.48 km² overlap
Reserve Program
6.38 km² overlap
Dorset
IUCN VWildlife Area
3.55 km² overlap
Whitford Woods Hunt
IUCN VClub
3.12 km² overlap
New Lyme
IUCN VWildlife Area
2.94 km² overlap
Diamond Shamrock Gun
IUCN VClub
2.19 km² overlap
Reserve Program
2.08 km² overlap
21 more protected areassorted by overlap area
Camp Stigwandish
IUCN VNature Preserve
1.56 km² overlap
Kraft Tract Acquisition
IUCN Not AssignedConservation Area
1.55 km² overlap
Reserve Program
1.32 km² overlap
Unknown
IUCN VNature Preserve
1.23 km² overlap
West Farmington
IUCN VWildlife Area
1.09 km² overlap
Mentor Marsh Dedicated
IUCN VNature Preserve
0.87 km² overlap
Orwell
IUCN VWildlife Area
0.83 km² overlap
Urbandale Gun
IUCN VClub
0.82 km² overlap
Wrlc 452
IUCN Not AssignedConservation Easement
0.59 km² overlap
Oakton
IUCN VLocal Conservation Area
0.58 km² overlap
Blue Rock
IUCN VNature Preserve
0.56 km² overlap
Cedar Hills
IUCN VEasement
0.51 km² overlap
Walter C. Best
IUCN VWildlife Preserve
0.44 km² overlap
Rome Dedicated
IUCN VNature Preserve
0.43 km² overlap
Camp Stigwandish
IUCN VEasement
0.42 km² overlap
A
IUCN VNature Preserve
0.41 km² overlap
Mesopatamia
IUCN VWildlife Area
0.41 km² overlap
Pallister Dedicated
IUCN VNature Preserve
0.39 km² overlap
Bass Lake
IUCN VPreserve
0.37 km² overlap
Conant
IUCN VWildlife Area
0.30 km² overlap
Morgan Swamp
IUCN VEasement
0.27 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
4 952 distinct species · 816 340 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 33 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 : 23 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 71 interactions GloBI sur 3 types (connectance 12.7%, 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°
9,0°C
Annual rain
1 010mm
Moisture idx (CMI)
0,05
Runoff
381mm/an
PET
955mm
AET
756mm
Mean slope
1,1°
Water table
63cm
Forest
67%
Crops
21%
Urban
4%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)