HydroBASINS lev08 watershed · #7080317420

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 3 administrative regions : Chelan, Skagit, Whatcom

5% lakePfafstetter: 78310807

Sub-basin area

973,3km²

Upstream area

3 567,1km²

Discharge

114,59m³/s

Mean elev.

1 225m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Skagit River258 km²

▲ Receives from 2 basins

Bassin de Skagit River2025 km²
Bassin de Granite Creek569 km²

3 dept-equivalent regions (GADM L2)

Skagit
Washington · United States
497.1 km²
50.9% of basin
Whatcom
Washington · United States
478.3 km²
49.0% of basin
Chelan
Washington · United States
0.9 km²
0.1% of basin

8 intersecting protected areas

Stephen Mather
IUCN Ib
Wilderness Area
779.24 km² overlap
North Cascades
IUCN II
National Park
658.59 km² overlap
Noisy-Diobsud
IUCN Ib
Wilderness
36.56 km² overlap
Skagit, Washington
IUCN V
Wild and Scenic River
3.47 km² overlap
Skagit-Snoqualmie
IUCN V
Wildlife Area Complex
0.50 km² overlap
Bacon Creek
IUCN V
Conservation Land
0.47 km² overlap
Skagit/Sauk River
IUCN V
Private Conservation Land
0.17 km² overlap
Skagit Land Trust
IUCN V
Local Land Trust
0.05 km² overlap

Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.

Species present

1 668 distinct species · 70 216 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 38 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).

RègnesAnimalPlanteChampignonBacterie

RelationsPredationParasitismeSymbiosePollinisation

StatutEn dangerVulnérableProtégéeEndémique

RègnesAnimalPlanteChampignonBacterie

RelationsPredationParasitismeSymbiosePollinisation

StatutEn dangerVulnérableProtégéeEndémique

Indicateurs du tissu écologique

Tissu écologique de Bassin de Skagit River : 27 espèces reliées par 94 interactions GloBI sur 4 types (connectance 12.1%, filtre Serrano α=0.2). 13 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées

Interactions affichées

Connectance

0.120

Patrimoniales

Plus dense que (national)0 %(top 100%)

Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).

Hydroclimate (BasinATLAS lev08)

Mean T°

4,0°C

Annual rain

1 457mm

Moisture idx (CMI)

0,52

Runoff

1 273mm/an

PET

691mm

AET

533mm

Mean slope

28,5°

Water table

949cm

Forest

70%

Crops

Urban

Protected

90%

HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)