HydroBASINS lev08 watershed · #7080366220
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 : Adams, Benton, Franklin, Grant
Sub-basin area
414,2km²
Upstream area
249 612km²
Discharge
3 512,54m³/s
Mean elev.
253m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Columbia River680 km²
- Bassin de Wahluke Branch Canal189 km²
4 dept-equivalent regions (GADM L2)
- Grant273.1 km²65.8% of basin
- Benton83.3 km²20.0% of basin
- Adams33.6 km²8.1% of basin
- Franklin25.3 km²6.1% of basin
1 intersecting protected areas
Hanford Reach
IUCN VNational Monument
235.59 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
666 distinct species · 8 379 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 36 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 122 interactions GloBI sur 5 types (connectance 19.4%, filtre Serrano α=0.2). 15 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°
11,0°C
Annual rain
188mm
Moisture idx (CMI)
-0,83
Runoff
56mm/an
PET
1 099mm
AET
167mm
Mean slope
2,5°
Water table
785cm
Forest
25%
Crops
15%
Urban
0%
Protected
50%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)