HydroBASINS lev08 watershed · #8080001070
Bassin de Number One 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 : Matanuska-Susitna, Valdez-Cordova
Sub-basin area
939,7km²
Upstream area
939,8km²
Discharge
63,95m³/s
Mean elev.
1 398m
Administrative coverage
2 dept-equivalent regions (GADM L2)
- 945.1 km²100.0% of basin
- 0.1 km²0.0% of basin
1 intersecting protected areas
Nellie Juan-College Fiord
IUCN IbWilderness Study Area
918.98 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
32 distinct species · 51 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 Number One River : 10 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 6 interactions GloBI sur 3 types (connectance 13.3%, filtre Serrano α=0.2).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydroclimate (BasinATLAS lev08)
Mean T°
-4,8°C
Annual rain
697mm
Moisture idx (CMI)
0,41
Runoff
1 897mm/an
PET
403mm
AET
352mm
Mean slope
14,0°
Water table
396cm
Forest
0%
Crops
0%
Urban
0%
Protected
83%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)