HydroBASINS lev08 watershed · #7080421030
Bassin de Willamette 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 3 administrative regions : Benton, Linn, Polk
Sub-basin area
168km²
Upstream area
12 724,9km²
Discharge
448,35m³/s
Mean elev.
75m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Calapooia River969 km²
- Bassin de Willamette River146 km²
3 dept-equivalent regions (GADM L2)
- Linn137.4 km²81.6% of basin
- Benton30.7 km²18.2% of basin
- Polk0.3 km²0.2% of basin
3 intersecting protected areas
Luckiamute
IUCN VState Natural Area
0.86 km² overlap
Takena Landing
IUCN VLocal Conservation Area
0.53 km² overlap
Reserve Program
0.32 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 146 distinct species · 133 661 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 Willamette River : 21 espèces reliées par 68 interactions GloBI sur 4 types (connectance 12.9%, filtre Serrano α=0.2). 12 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°
11,4°C
Annual rain
1 099mm
Moisture idx (CMI)
0,06
Runoff
1 115mm/an
PET
1 028mm
AET
611mm
Mean slope
0,7°
Water table
34cm
Forest
10%
Crops
69%
Urban
17%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)