HydroBASINS lev08 watershed · #7080038700
Bassin de West Branch Union 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 2 administrative regions : Hancock, Penobscot
Sub-basin area
1 332,9km²
Upstream area
1 332,9km²
Discharge
31,72m³/s
Mean elev.
108m
Administrative coverage
2 dept-equivalent regions (GADM L2)
- Hancock1274.0 km²95.4% of basin
- 61.7 km²4.6% of basin
7 intersecting protected areas
Branch
IUCN IIILake
4.83 km² overlap
Amherst
IUCN Not AssignedConservation Easement
0.79 km² overlap
Stanwood
IUCN VWildlife Sanctuary
0.64 km² overlap
Hardwood Hill Island
IUCN VPCL
0.61 km² overlap
Mariahvill Falls
IUCN VPrivate Conservation
0.50 km² overlap
Pool
0.19 km² overlap
Indian Point
IUCN VPrivate Conservation
0.06 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 695 distinct species · 90 723 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 39 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 West Branch Union River : 29 espèces reliées par 86 interactions GloBI sur 4 types (connectance 11.0%, 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°
6,0°C
Annual rain
1 155mm
Moisture idx (CMI)
0,26
Runoff
833mm/an
PET
850mm
AET
686mm
Mean slope
3,0°
Water table
225cm
Forest
87%
Crops
2%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)