HydroBASINS lev08 watershed · #7080334450

Bassin de Pilchuck 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 1 administrative regions : Snohomish

13% lakePfafstetter: 78310602

Sub-basin area

407,8km²

Upstream area

407,9km²

Discharge

16,64m³/s

Mean elev.

232m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Snohomish River105 km²

▲ Receives from 0 basins

Source / headwater (no upstream basin)

1 dept-equivalent regions (GADM L2)

Snohomish
Washington · United States
409.0 km²
100.0% of basin

12 intersecting protected areas

Morning Star
IUCN V
Natural Resources Conservation Area
13.51 km² overlap
Wetlands Reserve Program (WRP), Snohomish, WA
IUCN V
Reserve Program
3.05 km² overlap
Skagit-Snoqualmie
IUCN V
Wildlife Area Complex
0.64 km² overlap
Us-Wa-185-1
IUCN Not Assigned
Conservation Easement
0.52 km² overlap
Us-Wa-130-2
IUCN Not Assigned
Conservation Easement
0.44 km² overlap
Tipperman
IUCN Not Assigned
Wetlands Preserve
0.37 km² overlap
Us-Wa-109-3
IUCN Not Assigned
Conservation Easement
0.20 km² overlap
Monroe Fairgroun
IUCN Not Assigned
Fairgrounds
0.19 km² overlap
Us-Wa-185-5
IUCN Not Assigned
Conservation Easement
0.16 km² overlap

3 more protected areassorted by overlap area

Middle Pilchuck River Conservation Easement I-III
IUCN Not Assigned
Conservation Easement
0.10 km² overlap
Us-Wa-185-6
IUCN Not Assigned
Conservation Easement
0.03 km² overlap
Forestry Riparian Easement Program 286
IUCN Not Assigned
Easement
0.02 km² overlap

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

Species present

1 817 distinct species · 109 131 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 40 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 Pilchuck River : 26 espèces reliées par 100 interactions GloBI sur 4 types (connectance 11.6%, filtre Serrano α=0.2). 16 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées

Interactions affichées

100

Connectance

0.116

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°

9,3°C

Annual rain

1 484mm

Moisture idx (CMI)

0,43

Runoff

1 270mm/an

PET

809mm

AET

640mm

Mean slope

6,6°

Water table

360cm

Forest

79%

Crops

Urban

12%

Protected

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