HydroBASINS lev08 watershed · #8080307040
Bassin de Alagnak 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 1 administrative regions : Lake and Peninsula
Sub-basin area
155,9km²
Upstream area
1 338,5km²
Discharge
32,37m³/s
Mean elev.
274m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Nanuktuk Creek201 km²
- Bassin · #80803052700 km²
1 dept-equivalent regions (GADM L2)
- 156.8 km²100.0% of basin
2 intersecting protected areas
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
95 distinct species · 631 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 Alagnak River : 23 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 77 interactions GloBI sur 3 types (connectance 14.6%, 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°
0,3°C
Annual rain
662mm
Moisture idx (CMI)
0,30
Runoff
567mm/an
PET
464mm
AET
393mm
Mean slope
2,6°
Water table
163cm
Forest
0%
Crops
0%
Urban
0%
Protected
64%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)