HydroBASINS lev08 watershed · #7080441770
Bassin de Black 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 3 administrative regions : Jefferson, Lake Ontario, Lewis
Sub-basin area
1 307,9km²
Upstream area
5 507,3km²
Discharge
171,22m³/s
Mean elev.
222m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Black River1083 km²
- Bassin de Beaver River852 km²
3 dept-equivalent regions (GADM L2)
- JeffersonNew York · United States814.0 km²62.1% of basin
- LewisNew York · United States393.1 km²30.0% of basin
- Lake OntarioNew York · United States103.4 km²7.9% of basin
17 intersecting protected areas
Perch River
IUCN VWildlife Management Area
32.60 km² overlap
Grant Powell Memorial
IUCN IbState Forest
21.14 km² overlap
Tug Hill
IUCN VWildlife Management Area
13.81 km² overlap
Lookout
IUCN IbState Forest
8.28 km² overlap
Dexter Marsh
IUCN VWildlife Management Area
5.02 km² overlap
Lewis County Lands
IUCN VLocal Conservation Area
3.63 km² overlap
Sears Pond
IUCN IbState Forest
3.15 km² overlap
Reserve Program
2.59 km² overlap
Jefferson County Lands
IUCN VLocal Conservation Area
1.68 km² overlap
8 more protected areassorted by overlap area
Brownville
IUCN VWildlife Management Area
0.96 km² overlap
Us-Ny-118-24
IUCN Not AssignedConservation Easement
0.90 km² overlap
Jefferson County Alvar
IUCN VPrivate Conservation Land
0.80 km² overlap
Limerick Cedars
IUCN VPreserve
0.46 km² overlap
Reserve Program
0.43 km² overlap
Montague Town Lands
IUCN VLocal Conservation Area
0.30 km² overlap
Gull Island
IUCN VWildlife Management Area
0.02 km² overlap
Pinckney
IUCN IbState Forest
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 615 distinct species · 200 755 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 Black River : 21 espèces reliées par 73 interactions GloBI sur 3 types (connectance 13.8%, 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°
6,6°C
Annual rain
1 051mm
Moisture idx (CMI)
0,17
Runoff
757mm/an
PET
857mm
AET
677mm
Mean slope
1,3°
Water table
93cm
Forest
65%
Crops
25%
Urban
2%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)