HydroBASINS lev08 watershed · #7080311920
Bassin de Skagit 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 across 2 countries : Fraser Valley, Okanagan-Similkameen, Okanogan, Whatcom
Sub-basin area
2 024,7km²
Upstream area
2 025km²
Discharge
60,32m³/s
Mean elev.
1 361m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
4 dept-equivalent regions (GADM L2)
- 1034.1 km²50.9% of basin
- 985.5 km²48.5% of basin
- 10.6 km²0.5% of basin
- 1.0 km²0.0% of basin
11 intersecting protected areas
Stephen Mather
IUCN IbWilderness Area
560.43 km² overlap
E.C. MANNING PARK
IUCN IIA - Park
384.05 km² overlap
North Cascades
IUCN IINational Park
380.82 km² overlap
Pasayten
IUCN IbWilderness
359.78 km² overlap
SKAGIT VALLEY PARK
IUCN IIA - Park
279.77 km² overlap
Wildlife Habitat Areas
IUCN Not ApplicableWildlife Habitat Areas
29.89 km² overlap
Old Growth Management Areas (Mapped Legal)
IUCN Not ApplicableOld Growth Management Areas (Mapped Legal)
15.79 km² overlap
Ecological Reserve
1.01 km² overlap
Ecological Reserve
0.79 km² overlap
2 more protected areassorted by overlap area
Ecological Reserve
0.75 km² overlap
ROSS LAKE ECOLOGICAL RESERVE
IUCN IaEcological Reserve
0.64 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 224 distinct species · 36 693 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 37 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 Skagit River : 25 espèces reliées par 90 interactions GloBI sur 4 types (connectance 13.5%, filtre Serrano α=0.2). 12 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°
3,1°C
Annual rain
1 011mm
Moisture idx (CMI)
0,30
Runoff
936mm/an
PET
689mm
AET
497mm
Mean slope
25,6°
Water table
967cm
Forest
90%
Crops
0%
Urban
0%
Protected
81%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)