HydroBASINS lev08 watershed · #7080059400
Bassin · #7080059400
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
104,3km²
Upstream area
104,3km²
Discharge
6,51m³/s
Mean elev.
314m
Administrative coverage
1 dept-equivalent regions (GADM L2)
- 104.7 km²99.9% of basin
1 intersecting protected areas
Tonalite Creek
IUCN IaResearch Natural Area
38.19 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
32 distinct species · 338 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 11 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 · #7080059400 : 10 espèces reliées par 10 interactions GloBI sur 1 type (connectance 15.2%, 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°
4,4°C
Annual rain
1 722mm
Moisture idx (CMI)
0,72
Runoff
2 146mm/an
PET
488mm
AET
480mm
Mean slope
17,5°
Water table
566cm
Forest
74%
Crops
0%
Urban
0%
Protected
94%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)