HydroBASINS lev08 watershed · #7080341790
Bassin de South Fork Snoqualmie 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 : King, Kittitas
Sub-basin area
489,6km²
Upstream area
1 200,5km²
Discharge
60,14m³/s
Mean elev.
516m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
2 dept-equivalent regions (GADM L2)
- King488.6 km²99.5% of basin
- 2.4 km²0.5% of basin
30 intersecting protected areas
Snoqualmie Bog
IUCN VNatural Area Preserve
47.03 km² overlap
Alpine Lakes
IUCN IbWilderness
36.50 km² overlap
Upper Raging River
IUCN Not AssignedForest
18.58 km² overlap
Middle Fork Snoqualmie
IUCN VNatural Resources Conservation Area
10.87 km² overlap
Natural Resources Conservation Area
7.15 km² overlap
Watersheds
7.07 km² overlap
Uplands
IUCN Not AssignedForest
1.93 km² overlap
Snoqualmie Preservation Initiative -
IUCN Not AssignedTrail
1.89 km² overlap
Kings Lake Bog
IUCN VNatural Area Preserve
1.15 km² overlap
21 more protected areassorted by overlap area
Three Forks
IUCN VNatural Area
1.04 km² overlap
Patterson Creek Preserv
IUCN Not AssignedPreserve
0.93 km² overlap
Three Forks
IUCN IIIPark
0.86 km² overlap
Data not available
IUCN Not AssignedConservation Easement
0.63 km² overlap
Watershed
0.55 km² overlap
Hazel Wolf
IUCN VWetlands Preserve
0.47 km² overlap
Hazel Wolf Wetland
IUCN VNatural Area
0.47 km² overlap
Patterson Creek Preserv
IUCN Not AssignedPreserve
0.45 km² overlap
TDR Program
IUCN Not AssignedConservation Easement
0.38 km² overlap
Beaver Lake
IUCN VPreserve
0.23 km² overlap
Carnation Marsh
IUCN IIINatural Area
0.22 km² overlap
Jolley 2002
IUCN VEnvironmental System
0.20 km² overlap
West Tiger Mountain
IUCN VNatural Resources Conservation Area
0.17 km² overlap
Snoqualmie Fall City Reach
IUCN Not AssignedConservation Easement
0.15 km² overlap
Tokul Bypass Site
IUCN Not AssignedConservation Easement
0.14 km² overlap
Fall
IUCN Not AssignedCity Natural Area
0.12 km² overlap
Canyon Creek
IUCN VPreserve
0.11 km² overlap
Snoqualmie TDR
IUCN Not AssignedConservation Easement
0.09 km² overlap
Snoqualime
IUCN Not AssignedForest
0.09 km² overlap
Steven & Rosina Kipper
IUCN VPreserve
0.07 km² overlap
Bog
IUCN VNatural Area
0.05 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 682 distinct species · 185 182 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 35 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 South Fork Snoqualmie River : 23 espèces reliées par 85 interactions GloBI sur 4 types (connectance 12.8%, filtre Serrano α=0.2). 14 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°
8,1°C
Annual rain
1 976mm
Moisture idx (CMI)
0,58
Runoff
1 447mm/an
PET
782mm
AET
656mm
Mean slope
12,7°
Water table
510cm
Forest
92%
Crops
1%
Urban
8%
Protected
8%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)