HydroBASINS lev08 watershed · #7080015600
Bassin de North Fork Skokomish 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 : Grays Harbor, Jefferson, Mason
Sub-basin area
620,4km²
Upstream area
620,4km²
Discharge
37,79m³/s
Mean elev.
589m
Administrative coverage
3 dept-equivalent regions (GADM L2)
- Mason598.0 km²96.1% of basin
- Jefferson20.1 km²3.2% of basin
- 4.0 km²0.6% of basin
11 intersecting protected areas
Olympic National Park
IUCN VMarine Protected Area
133.72 km² overlap
Olympic
IUCN Not ApplicableUNESCO-MAB Biosphere Reserve
132.38 km² overlap
Olympic National Park
IUCN Not ApplicableWorld Heritage Site (natural or mixed)
132.38 km² overlap
Olympic
IUCN IINational Park
130.59 km² overlap
Daniel J. Evans
IUCN IbWilderness Area
127.58 km² overlap
Mount Skokomish
IUCN IbWilderness
10.38 km² overlap
Wonder Mountain
IUCN IbWilderness
8.91 km² overlap
Watershed Protection
0.29 km² overlap
Wildlife Area Complex
0.27 km² overlap
2 more protected areassorted by overlap area
Skokomish River Confluence
IUCN Not AssignedConservation Easement
0.13 km² overlap
Ink Blot
IUCN VNatural Area Preserve
0.04 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 626 distinct species · 136 066 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 29 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 North Fork Skokomish River : 17 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 61 interactions GloBI sur 4 types (connectance 14.0%, filtre Serrano α=0.2). 13 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°
7,7°C
Annual rain
2 301mm
Moisture idx (CMI)
0,65
Runoff
1 681mm/an
PET
773mm
AET
623mm
Mean slope
19,0°
Water table
636cm
Forest
97%
Crops
1%
Urban
0%
Protected
24%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)