HydroBASINS lev08 watershed · #7080336740
Bassin de Skykomish 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, King, Kittitas, Snohomish
Sub-basin area
2 178,5km²
Upstream area
2 178,6km²
Discharge
138,85m³/s
Mean elev.
848m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
4 dept-equivalent regions (GADM L2)
- 1473.3 km²67.4% of basin
- King708.2 km²32.4% of basin
- 3.2 km²0.1% of basin
- 0.2 km²0.0% of basin
18 intersecting protected areas
Wild Sky
IUCN IbWilderness
433.35 km² overlap
Alpine Lakes
IUCN IbWilderness
294.51 km² overlap
Henry M. Jackson
IUCN IbWilderness
191.35 km² overlap
Morning Star
IUCN VNatural Resources Conservation Area
105.15 km² overlap
Snoqualmie Bog
IUCN VNatural Area Preserve
9.74 km² overlap
Everett Water Works
IUCN VWater Works
8.20 km² overlap
Watershed
2.16 km² overlap
Wild Sky - Wallace Falls
IUCN VPrivate Conservation
1.92 km² overlap
Skykomish Habitat Bank
IUCN Not AssignedConservation Easement
0.76 km² overlap
9 more protected areassorted by overlap area
Watershed
0.75 km² overlap
Skykomish Timber Goldbar
IUCN VPrivate Conservation
0.71 km² overlap
Glacier Peak
IUCN IbWilderness
0.64 km² overlap
Lower Wallace River
IUCN Not AssignedConservation Easement
0.48 km² overlap
Skagit-Snoqualmie
IUCN VWildlife Area Complex
0.24 km² overlap
Knoll Skykomish River
IUCN Not AssignedPreserve
0.18 km² overlap
Forestry Riparian Easement Program 290
IUCN Not AssignedEasement
0.15 km² overlap
City Of Tacoma Watershed
IUCN VWatershed
0.03 km² overlap
Snohomish
IUCN VCounty Conservation Land
0.01 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
3 214 distinct species · 79 954 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 44 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 Skykomish River : 28 espèces reliées par 101 interactions GloBI sur 6 types (connectance 10.7%, 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°
6,0°C
Annual rain
1 978mm
Moisture idx (CMI)
0,62
Runoff
1 645mm/an
PET
721mm
AET
602mm
Mean slope
20,3°
Water table
790cm
Forest
92%
Crops
0%
Urban
1%
Protected
23%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)