HydroBASINS lev08 watershed · #7080059410
Bassin · #7080059410
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 : Sitka
Sub-basin area
957km²
Upstream area
957km²
Discharge
30,02m³/s
Mean elev.
290m
Administrative coverage
1 dept-equivalent regions (GADM L2)
- 912.7 km²94.9% of basin
2 intersecting protected areas
West Chichagof-Yakobi
IUCN IbWilderness
55.55 km² overlap
Tonalite Creek
IUCN IaResearch Natural Area
2.11 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
273 distinct species · 1 248 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 47 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 · #7080059410 : 32 espèces dont 3 patrimoniales (LR IUCN CR/EN/VU) reliées par 86 interactions GloBI sur 4 types (connectance 7.6%, filtre Serrano α=0.2). 16 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°
4,5°C
Annual rain
1 780mm
Moisture idx (CMI)
0,73
Runoff
2 363mm/an
PET
485mm
AET
478mm
Mean slope
18,2°
Water table
648cm
Forest
51%
Crops
0%
Urban
0%
Protected
41%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)