HydroBASINS lev08 watershed · #7080394690
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 4 administrative regions : Clackamas, Clark, Multnomah, Skamania
Sub-basin area
902,4km²
Upstream area
610 224,8km²
Discharge
5 911,84m³/s
Mean elev.
252m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Columbia River1882 km²
- Bassin de Sandy River1299 km²
4 dept-equivalent regions (GADM L2)
- Clark376.7 km²41.6% of basin
- 260.3 km²28.8% of basin
- 244.4 km²27.0% of basin
- 23.1 km²2.6% of basin
30 intersecting protected areas
Columbia Land Trust
IUCN VLocal Land Trust
1.31 km² overlap
East Government Island
IUCN VNatural Area
0.80 km² overlap
Towle Butte
IUCN VNatural Area
0.47 km² overlap
Unknown
IUCN VPark
0.41 km² overlap
Washougal River
IUCN VGreenway
0.39 km² overlap
Sunshine Butte
IUCN VNatural Area
0.35 km² overlap
Fort James
IUCN VEnvironmental System
0.28 km² overlap
Gabbert Hill
IUCN VNatural Area
0.24 km² overlap
Catkin Marsh
IUCN VNatural Area
0.22 km² overlap
21 more protected areassorted by overlap area
Gresham Woods
IUCN VNatural Area
0.22 km² overlap
US-WA-222-1
IUCN Not AssignedMitigation Bank
0.18 km² overlap
PCON86
IUCN VLocal Land Trust
0.17 km² overlap
Columbia
IUCN VShoreline
0.17 km² overlap
Upper Johnson Creek
IUCN VNatural Area
0.15 km² overlap
Gabbert Hill East
IUCN VLocal Conservation Area
0.15 km² overlap
Grant Butte
IUCN VWetlands
0.13 km² overlap
Flyway Wetlands
IUCN VNatural Area
0.11 km² overlap
Chastain Creek
IUCN VNatural Area
0.11 km² overlap
7Th Street
IUCN VNatural Area
0.11 km² overlap
Conservation
IUCN VEasement
0.09 km² overlap
Henry J. Biddle
IUCN VNature Preserve
0.09 km² overlap
Wilkes Creek Headwaters
IUCN VNatural Area
0.08 km² overlap
Springwater Woods
IUCN VLocal Conservation Area
0.07 km² overlap
Hogan Road
IUCN VLocal Conservation Area
0.06 km² overlap
Local Conservation Area
0.06 km² overlap
Dulcich & Plescia
IUCN VEnvironmental System
0.05 km² overlap
Cross Levee
IUCN VNatural Area
0.04 km² overlap
Fujitsu Wetland
IUCN VMitigation
0.04 km² overlap
Hogan Butte
IUCN VLocal Conservation Area
0.03 km² overlap
Robinson
IUCN VLocal Conservation Area
0.02 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
3 851 distinct species · 1 398 377 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 31 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 dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 70 interactions GloBI sur 4 types (connectance 15.1%, 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°
10,4°C
Annual rain
1 738mm
Moisture idx (CMI)
0,39
Runoff
1 407mm/an
PET
924mm
AET
668mm
Mean slope
7,2°
Water table
237cm
Forest
65%
Crops
8%
Urban
31%
Protected
1%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)