HydroBASINS lev08 watershed · #7080362510
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 : Grant, Kittitas
Sub-basin area
52,3km²
Upstream area
236 383,9km²
Discharge
3 487,95m³/s
Mean elev.
286m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Columbia River915 km²
- Bassin de Johnson Creek162 km²
2 dept-equivalent regions (GADM L2)
- Grant29.7 km²56.6% of basin
- 22.8 km²43.4% of basin
1 intersecting protected areas
Grant Co PUD#2
IUCN VConservation Land
1.22 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
576 distinct species · 33 230 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 32 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 : 23 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 64 interactions GloBI sur 3 types (connectance 12.9%, filtre Serrano α=0.2). 9 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°
10,8°C
Annual rain
179mm
Moisture idx (CMI)
-0,83
Runoff
83mm/an
PET
1 085mm
AET
159mm
Mean slope
5,2°
Water table
858cm
Forest
40%
Crops
9%
Urban
0%
Protected
3%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)