HydroBASINS lev08 watershed · #7080388350
Bassin de Columbia 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 2 administrative regions : Cowlitz, Multnomah
Sub-basin area
0,7km²
Upstream area
642 375,1km²
Discharge
7 157,37m³/s
Mean elev.
2m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Lewis River2713 km²
- Bassin de Salmon Creek488 km²
2 dept-equivalent regions (GADM L2)
- 0.7 km²97.8% of basin
- 0.0 km²2.2% of basin
1 intersecting protected areas
Sauvie Island
IUCN VWildlife Area
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
963 distinct species · 32 962 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 41 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 Columbia River : 28 espèces reliées par 82 interactions GloBI sur 5 types (connectance 10.0%, 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°
11,5°C
Annual rain
1 132mm
Moisture idx (CMI)
0,13
Runoff
1 161mm/an
PET
982mm
AET
628mm
Mean slope
0,3°
Water table
3cm
Forest
100%
Crops
19%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)