HydroBASINS lev08 watershed · #7080494110
Bassin de Allegheny 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 : Cattaraugus, Chautauqua, Mc Kean, Warren
Sub-basin area
2 061km²
Upstream area
5 080,1km²
Discharge
98,18m³/s
Mean elev.
570m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Ischua Creek553 km²
- Bassin de Dodge Creek252 km²
4 dept-equivalent regions (GADM L2)
- CattaraugusNew York · United States1394.3 km²67.5% of basin
- 549.9 km²26.6% of basin
- Warren119.1 km²5.8% of basin
- ChautauquaNew York · United States1.0 km²0.0% of basin
9 intersecting protected areas
McCarty Hill
IUCN IbState Forest
13.19 km² overlap
Nine Mile Creek
IUCN IbState Forest
12.79 km² overlap
Rock City
IUCN IbState Forest
11.92 km² overlap
Cattaraugus County Lands
IUCN VLocal Conservation Area
4.80 km² overlap
Golden Hill
IUCN IbState Forest
4.50 km² overlap
New York
IUCN VState Lands
4.03 km² overlap
Raecher Hill
IUCN IbState Forest
3.40 km² overlap
Reserve Program
1.43 km² overlap
Birch Run Ponds
IUCN VWildlife Management Area
0.16 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
3 652 distinct species · 147 916 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 Allegheny River : 28 espèces reliées par 70 interactions GloBI sur 4 types (connectance 10.0%, filtre Serrano α=0.2). 10 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°
6,5°C
Annual rain
1 131mm
Moisture idx (CMI)
0,18
Runoff
588mm/an
PET
922mm
AET
772mm
Mean slope
8,3°
Water table
434cm
Forest
96%
Crops
3%
Urban
1%
Protected
3%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)