HydroBASINS lev08 watershed · #8080005670
Bassin de Nonvalnuk 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 : Nome
Sub-basin area
798,6km²
Upstream area
798,6km²
Discharge
3,46m³/s
Mean elev.
176m
Administrative coverage
1 dept-equivalent regions (GADM L2)
- 802.2 km²99.8% of basin
3 intersecting protected areas
Marine Protected Area
444.25 km² overlap
Yukon Delta
IUCN IVNational Wildlife Refuge
444.25 km² overlap
Andreafsky
IUCN IbWilderness Area
291.80 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
37 distinct species · 117 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 13 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 Nonvalnuk River : 11 espèces reliées par 12 interactions GloBI sur 3 types (connectance 15.4%, filtre Serrano α=0.2). 2 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°
-3,5°C
Annual rain
415mm
Moisture idx (CMI)
0,07
Runoff
356mm/an
PET
385mm
AET
300mm
Mean slope
3,3°
Water table
57cm
Forest
0%
Crops
0%
Urban
0%
Protected
79%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)