HydroBASINS lev08 watershed · #7080344510
Bassin de Middle 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
446,1km²
Upstream area
446,1km²
Discharge
23,49m³/s
Mean elev.
996m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
2 dept-equivalent regions (GADM L2)
- King445.8 km²99.7% of basin
- 1.5 km²0.3% of basin
13 intersecting protected areas
Alpine Lakes
IUCN IbWilderness
278.64 km² overlap
Mount Si
IUCN VNatural Resources Conservation Area
29.17 km² overlap
Middle Fork Snoqualmie
IUCN VNatural Resources Conservation Area
28.56 km² overlap
Wild and Scenic River
25.98 km² overlap
Pratt River, Washington
IUCN VWild and Scenic River
12.30 km² overlap
Wild and Scenic River
8.56 km² overlap
Middle Fork Snoqualmie
IUCN VNatural Area
2.68 km² overlap
Hardscrabble Creek
IUCN Not AssignedConservation Easement
0.90 km² overlap
Three Forks
IUCN IIIPark
0.28 km² overlap
4 more protected areassorted by overlap area
Hardscrabble Peak
IUCN VPrivate Conservation
0.23 km² overlap
Goldmyer Hot Springs
IUCN Not AssignedConservation Easement
0.08 km² overlap
Three Forks
IUCN VNatural Area
0.01 km² overlap
Cattle Point
IUCN VNatural Resources Conservation Area
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 222 distinct species · 15 437 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 45 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 Middle Fork Snoqualmie River : 30 espèces reliées par 109 interactions GloBI sur 5 types (connectance 10.5%, 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°
5,4°C
Annual rain
2 245mm
Moisture idx (CMI)
0,69
Runoff
1 553mm/an
PET
682mm
AET
596mm
Mean slope
24,5°
Water table
894cm
Forest
88%
Crops
0%
Urban
1%
Protected
46%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)