HydroBASINS lev08 watershed · #7080015910
Bassin de Blair Waterway
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, Pierce
Sub-basin area
218,5km²
Upstream area
218,5km²
Discharge
6,19m³/s
Mean elev.
79m
Administrative coverage
2 dept-equivalent regions (GADM L2)
- King151.3 km²69.1% of basin
- Pierce54.8 km²25.0% of basin
30 intersecting protected areas
Duwamish Head
IUCN VGreenbelt
0.22 km² overlap
Friends of the Hylebos Easement 0421313048
IUCN Not AssignedEasement
0.14 km² overlap
Madrona
IUCN VPark
0.08 km² overlap
Hamilton Viewp
IUCN VViewpoint
0.07 km² overlap
Marine Protected Area
0.05 km² overlap
Parkside
IUCN VWetlands
0.04 km² overlap
Lincoln Park Marine Preserve
IUCN IVMarine Protected Area
0.04 km² overlap
White Center Pond
IUCN VNatural Area
0.04 km² overlap
Sonju
IUCN VPark
0.04 km² overlap
21 more protected areassorted by overlap area
Marine Protected Area
0.04 km² overlap
Marine Protected Area
0.03 km² overlap
West Milton
IUCN VNature Preserve
0.02 km² overlap
Cedarbrook
IUCN VOpen Space
0.02 km² overlap
Arroyo Heights
IUCN VLocal Conservation Area
0.01 km² overlap
Arroyos
IUCN VNatural Area
0.01 km² overlap
Fairmount
IUCN VPark
0.01 km² overlap
Stim Bullitt
IUCN VNatural Area
0.01 km² overlap
College Street Ravine
IUCN VLocal Conservation Area
0.01 km² overlap
Orchard Street Ravine
IUCN VLocal Conservation Area
0.01 km² overlap
Saltwater Underwater Park
IUCN IVMarine Protected Area
0.01 km² overlap
Ellenswood Conservancy
IUCN VLocal Conservation Area
0.01 km² overlap
Friends of the Hylebos Easement 5990000012
IUCN Not AssignedEasement
0.00 km² overlap
Private Conservation
0.00 km² overlap
Pelly Place
IUCN VNatural Area
0.00 km² overlap
Massey Creek Row
IUCN VLocal Conservation Area
0.00 km² overlap
Friends of the Hylebos Easement 0420052005
IUCN Not AssignedEasement
0.00 km² overlap
Lincoln Park Hillside
IUCN Not AssignedPark
0.00 km² overlap
Seola Beach
IUCN VGreenbelt
0.00 km² overlap
Sunset
IUCN VGardens
0.00 km² overlap
Marine Protected Area
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
4 965 distinct species · 553 124 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 34 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 Blair Waterway : 25 espèces reliées par 62 interactions GloBI sur 4 types (connectance 11.1%, filtre Serrano α=0.2). 9 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°
10,6°C
Annual rain
1 019mm
Moisture idx (CMI)
0,15
Runoff
926mm/an
PET
869mm
AET
571mm
Mean slope
3,5°
Water table
279cm
Forest
44%
Crops
4%
Urban
97%
Protected
1%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)