HydroBASINS lev08 watershed · #7080407010

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 : Marion, Polk, Yamhill

2% lakePfafstetter: 78220055

Sub-basin area

379,6km²

Upstream area

19 492,9km²

Discharge

724,94m³/s

Mean elev.

66m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Willamette River49 km²

▲ Receives from 2 basins

Bassin de Beaver Creek306 km²
Bassin de Croisan Creek42 km²

3 dept-equivalent regions (GADM L2)

Marion
Oregon · United States
214.9 km²
56.5% of basin
Polk
Oregon · United States
97.4 km²
25.6% of basin
Yamhill
Oregon · United States
68.1 km²
17.9% of basin

8 intersecting protected areas

Zena
IUCN Not Assigned
Conservation Easement
2.83 km² overlap
Emergency Watershed Protection Program - Floodplain Easement (EWPP-FPE), Yamhill, OR
IUCN V
Watershed Protection
1.18 km² overlap
Wetlands Reserve Program (WRP), Marion, OR
IUCN V
Reserve Program
0.32 km² overlap
Wetlands Reserve Program (WRP), Polk, OR
IUCN V
Reserve Program
0.19 km² overlap
Claggett Creek
IUCN V
Natural Area
0.17 km² overlap
Straub
IUCN V
Nature Park
0.04 km² overlap
Chandler
IUCN V
Nature Park
0.03 km² overlap
Mouth Of Mill Creek
IUCN V
Local Conservation Area
0.01 km² overlap

Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.

Species present

1 883 distinct species · 234 092 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 39 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).

RègnesAnimalPlanteChampignonBacterie

RelationsPredationParasitismeSymbiosePollinisation

StatutEn dangerVulnérableProtégéeEndémique

RègnesAnimalPlanteChampignonBacterie

RelationsPredationParasitismeSymbiosePollinisation

StatutEn dangerVulnérableProtégéeEndémique

Indicateurs du tissu écologique

Tissu écologique de Bassin de Willamette River : 28 espèces reliées par 81 interactions GloBI sur 5 types (connectance 10.9%, filtre Serrano α=0.2). 11 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées

Interactions affichées

Connectance

0.109

Patrimoniales

Plus dense que (national)0 %(top 100%)

Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).

Hydroclimate (BasinATLAS lev08)

Mean T°

11,2°C

Annual rain

1 063mm

Moisture idx (CMI)

0,02

Runoff

1 125mm/an

PET

1 032mm

AET

602mm

Mean slope

1,7°

Water table

62cm

Forest

18%

Crops

55%

Urban

17%

Protected

HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)