HydroBASINS lev08 watershed · #8080002300
Bassin de Lewis 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 : Matanuska-Susitna
Sub-basin area
522,9km²
Upstream area
522,9km²
Discharge
11,01m³/s
Mean elev.
303m
Administrative coverage
1 dept-equivalent regions (GADM L2)
- 526.0 km²100.0% of basin
2 intersecting protected areas
Susitna Flats State
IUCN VGame Refuge
123.81 km² overlap
Talachulitna
IUCN VRecreation River
0.91 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
83 distinct species · 269 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 36 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 Lewis River : 29 espèces reliées par 68 interactions GloBI sur 3 types (connectance 10.8%, filtre Serrano α=0.2). 7 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°
0,1°C
Annual rain
577mm
Moisture idx (CMI)
0,10
Runoff
665mm/an
PET
516mm
AET
380mm
Mean slope
5,0°
Water table
110cm
Forest
55%
Crops
0%
Urban
0%
Protected
24%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)