HydroBASINS lev08 watershed · #7080014930
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 6 administrative regions : Clatsop, Columbia, Cowlitz, Lewis, Multnomah +1
Sub-basin area
1 299,9km²
Upstream area
651 407,2km²
Discharge
7 583,47m³/s
Mean elev.
223m
Administrative coverage
Hydrographic chain
▼ Drains into
Outlet (drains to ocean / endorheic)
▲ Receives from 2 basins
- Bassin de Owl Creek51 km²
- Bassin de Carrolls Channel27 km²
6 dept-equivalent regions (GADM L2)
- Columbia516.4 km²39.6% of basin
- 308.1 km²23.6% of basin
- 307.2 km²23.6% of basin
- 91.1 km²7.0% of basin
- 67.2 km²5.2% of basin
- Lewis13.2 km²1.0% of basin
14 intersecting protected areas
Refuge
18.96 km² overlap
Wilderness Study Area
3.15 km² overlap
Wilderness Study Area
2.06 km² overlap
Wildlife Area Complex
1.90 km² overlap
Estuary
0.84 km² overlap
Research Natural Area
0.59 km² overlap
National Wildlife Refuge
0.59 km² overlap
Marine Protected Area
0.59 km² overlap
Lewis And Clark
IUCN IVNational Wildlife Refuge
0.59 km² overlap
5 more protected areassorted by overlap area
West Bank Property
IUCN VEnvironmental System
0.14 km² overlap
Skull Island
IUCN VRegistered Natural Area
0.10 km² overlap
Puget Island
IUCN VPrivate Conservation Land
0.08 km² overlap
Forestry Riparian Easement Program 283
IUCN Not AssignedEasement
0.03 km² overlap
Forestry Riparian Easement Program 282
IUCN Not AssignedEasement
0.03 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 877 distinct species · 234 926 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 30 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 : 21 espèces reliées par 66 interactions GloBI sur 4 types (connectance 14.2%, filtre Serrano α=0.2). 10 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°
9,6°C
Annual rain
1 845mm
Moisture idx (CMI)
0,51
Runoff
1 356mm/an
PET
873mm
AET
661mm
Mean slope
7,5°
Water table
262cm
Forest
92%
Crops
4%
Urban
3%
Protected
2%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)