HydroBASINS lev08 watershed · #7080014970
Bassin de Grays 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, Pacific, Wahkiakum
Sub-basin area
317,3km²
Upstream area
317,4km²
Discharge
15,93m³/s
Mean elev.
337m
Administrative coverage
3 dept-equivalent regions (GADM L2)
- 196.9 km²61.9% of basin
- 116.0 km²36.5% of basin
- Lewis5.0 km²1.6% of basin
4 intersecting protected areas
Willapa Divide
IUCN VNatural Area Preserve
2.31 km² overlap
Crazy Johnson
IUCN VEnvironmental System
1.34 km² overlap
PCON12
IUCN VLocal Land Trust
0.42 km² overlap
Reserve Program
0.36 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
349 distinct species · 3 291 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 Grays River : 16 espèces reliées par 99 interactions GloBI sur 4 types (connectance 22.8%, filtre Serrano α=0.2). 14 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°
8,8°C
Annual rain
2 541mm
Moisture idx (CMI)
0,67
Runoff
1 582mm/an
PET
825mm
AET
692mm
Mean slope
12,4°
Water table
380cm
Forest
100%
Crops
1%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)