HydroBASINS lev08 watershed · #8080002840
Bassin de Big 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 : Kenai Peninsula, Kodiak Island
Sub-basin area
284,2km²
Upstream area
284,2km²
Discharge
13,7m³/s
Mean elev.
426m
Administrative coverage
2 dept-equivalent regions (GADM L2)
- 163.7 km²57.3% of basin
- 121.9 km²42.7% of basin
2 intersecting protected areas
Katmai Bay
IUCN IINational Park
285.65 km² overlap
Katmai
IUCN IbWilderness Area
285.65 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
21 distinct species · 47 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 10 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 Big River : 9 espèces reliées par 9 interactions GloBI sur 1 type (connectance 20.0%, filtre Serrano α=0.2). 1 bulle taxonomique (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°
1,2°C
Annual rain
1 022mm
Moisture idx (CMI)
0,55
Runoff
1 432mm/an
PET
459mm
AET
431mm
Mean slope
14,5°
Water table
581cm
Forest
4%
Crops
0%
Urban
0%
Protected
100%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)