Ontologia

HydroBASINS lev08 watershed · #7080404880

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 4 administrative regions : Clackamas, Marion, Washington, Yamhill

Pfafstetter: 78220051

Sub-basin area

279,8km²

Upstream area

21 945,2km²

Discharge

825,16m³/s

Mean elev.

80m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Tualatin River1949 km²

▲ Receives from 2 basins

4 dept-equivalent regions (GADM L2)

6 intersecting protected areas

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

Species present

1 045 distinct species · 100 263 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

100 263 obs · 7 cellules
Obs. / cellule
≥ 30 115
30 115–30 114
23 322–30 114
8 088–23 321
< 8 088

Source : GBIF — observations agrégées par hexagones 0.027° × 0.027° (~22km), filtre précision coordonnée < 10 km. Fond carte : OpenFreeMap · © OpenStreetMap.

Ecological tissue

Sample of 33 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

Indicateurs du tissu écologique

Tissu écologique de Bassin de Willamette River : 22 espèces reliées par 81 interactions GloBI sur 4 types (connectance 12.9%, filtre Serrano α=0.2). 14 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
36
Interactions affichées
81
Connectance
0.129
Patrimoniales
0
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 043mm

Moisture idx (CMI)

0,03

Runoff

1 096mm/an

PET

1 001mm

AET

609mm

Mean slope

2,4°

Water table

94cm

Forest

15%

Crops

51%

Urban

17%

Protected

0%

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