Ontologia

HydroBASINS lev08 watershed · #7080299340

Bassin de Chehalis 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 1 administrative regions : Fraser Valley

18% lakePfafstetter: 78321062

Sub-basin area

389,6km²

Upstream area

389,6km²

Discharge

19,93m³/s

Mean elev.

818m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Harrison River41 km²

▲ Receives from 0 basins

Source / headwater (no upstream basin)

1 dept-equivalent regions (GADM L2)

5 intersecting protected areas

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

Species present

289 distinct species · 1 402 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

1 402 obs · 12 cellules
Obs. / cellule
≥ 544
215–543
144–214
84–143
< 84

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

Ecological tissue

Sample of 45 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 Chehalis River : 28 espèces reliées par 110 interactions GloBI sur 5 types (connectance 10.6%, filtre Serrano α=0.2). 18 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
46
Interactions affichées
110
Connectance
0.106
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°

6,0°C

Annual rain

1 423mm

Moisture idx (CMI)

0,50

Runoff

1 603mm/an

PET

702mm

AET

560mm

Mean slope

23,6°

Water table

798cm

Forest

82%

Crops

1%

Urban

0%

Protected

0%

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