HydroBASINS lev08 watershed · #7080379800
Bassin de Allagash Stream
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 : Penobscot, Piscataquis, Somerset
Sub-basin area
993,4km²
Upstream area
993,4km²
Discharge
18,68m³/s
Mean elev.
330m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
3 dept-equivalent regions (GADM L2)
- 974.9 km²97.9% of basin
- 15.3 km²1.5% of basin
- 5.7 km²0.6% of basin
5 intersecting protected areas
Katahdin
IUCN Not AssignedForest
86.18 km² overlap
Baxter
IUCN VState Park
42.07 km² overlap
Wilderness
23.28 km² overlap
Watershed
19.39 km² overlap
Chamberlain Lake
IUCN VEcological Reserve
4.77 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
544 distinct species · 12 043 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 Allagash Stream : 27 espèces reliées par 68 interactions GloBI sur 3 types (connectance 10.2%, 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°
3,4°C
Annual rain
991mm
Moisture idx (CMI)
0,21
Runoff
649mm/an
PET
779mm
AET
647mm
Mean slope
2,6°
Water table
114cm
Forest
80%
Crops
0%
Urban
0%
Protected
8%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)