HydroBASINS lev08 watershed · #7080337140
Bassin de Stehekin 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 4 administrative regions : Chelan, Okanogan, Skagit, Snohomish
Sub-basin area
2 411,3km²
Upstream area
2 411,3km²
Discharge
50,29m³/s
Mean elev.
1 349m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
4 dept-equivalent regions (GADM L2)
- 2403.6 km²99.4% of basin
- 7.5 km²0.3% of basin
- 5.4 km²0.2% of basin
- 2.0 km²0.1% of basin
5 intersecting protected areas
Glacier Peak
IUCN IbWilderness
589.12 km² overlap
Stephen Mather
IUCN IbWilderness Area
521.70 km² overlap
North Cascades
IUCN IINational Park
296.96 km² overlap
Lake Chelan-Sawtooth
IUCN IbWilderness
231.09 km² overlap
Wildlife Area Complex
2.65 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 391 distinct species · 69 394 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 33 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 Stehekin River : 23 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 82 interactions GloBI sur 4 types (connectance 14.6%, filtre Serrano α=0.2). 11 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
891mm
Moisture idx (CMI)
0,10
Runoff
665mm/an
PET
753mm
AET
454mm
Mean slope
23,7°
Water table
844cm
Forest
74%
Crops
3%
Urban
0%
Protected
57%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)