HydroBASINS lev08 watershed · #7080015820
Bassin de Nisqually 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 : Lewis, Pierce, Thurston
Sub-basin area
1 878,7km²
Upstream area
1 878,7km²
Discharge
69,87m³/s
Mean elev.
575m
Administrative coverage
3 dept-equivalent regions (GADM L2)
- Pierce1142.6 km²60.7% of basin
- Lewis497.6 km²26.4% of basin
- Thurston243.4 km²12.9% of basin
30 intersecting protected areas
Mount Rainier
IUCN IINational Park
153.85 km² overlap
Mount Rainier
IUCN IbWilderness Area
137.92 km² overlap
Mount Rainier Gateway
IUCN VForest Reserve
10.17 km² overlap
Glacier View
IUCN IbWilderness
4.02 km² overlap
Billy Frank Jr. Nisqually
IUCN IVNational Wildlife Refuge
2.96 km² overlap
Marine Protected Area
2.96 km² overlap
Local Land Trust
1.69 km² overlap
Reserve Program
1.40 km² overlap
Bald Hill
IUCN VNatural Area Preserve
1.24 km² overlap
21 more protected areassorted by overlap area
Tahoma Forest South
IUCN VNatural Resources Conservation Area
0.94 km² overlap
Hancock Property
IUCN VEnvironmental System
0.86 km² overlap
Tatoosh
IUCN IbWilderness
0.66 km² overlap
Hancock Property 2011
IUCN VEnvironmental System
0.61 km² overlap
Morse
IUCN VWildlife Preserve
0.40 km² overlap
National Wildlife Refuge
0.38 km² overlap
Patterson Springs
IUCN VPrivate Conservation
0.33 km² overlap
Morse
IUCN VWildlife Preserve
0.33 km² overlap
Reserve Program
0.26 km² overlap
Private Conservation
0.24 km² overlap
Conservation Easement
0.22 km² overlap
Ableman
IUCN VEnvironmental System
0.16 km² overlap
Van Antwerp
IUCN VEnvironmental System
0.16 km² overlap
Wildlife Area Complex
0.14 km² overlap
Nelson
IUCN VEnvironmental System
0.13 km² overlap
Reserve Program
0.11 km² overlap
Tatrimima
IUCN VEnvironmental System
0.11 km² overlap
Environmental System
0.10 km² overlap
Gilmur
IUCN VIForest Preserve
0.09 km² overlap
Trent
IUCN VShoreline
0.08 km² overlap
Roy Farmland
IUCN Not AssignedConservation Easement
0.08 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
4 681 distinct species · 228 382 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).
Indicateurs du tissu écologique
Tissu écologique de Bassin de Nisqually River : 27 espèces reliées par 87 interactions GloBI sur 4 types (connectance 11.2%, 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°
8,1°C
Annual rain
1 715mm
Moisture idx (CMI)
0,44
Runoff
1 226mm/an
PET
827mm
AET
630mm
Mean slope
9,7°
Water table
338cm
Forest
85%
Crops
4%
Urban
2%
Protected
9%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)