HydroBASINS lev08 watershed · #7080014980
Bassin de Bear Branch
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 : Clatsop, Pacific, Wahkiakum
Sub-basin area
443,6km²
Upstream area
443,6km²
Discharge
9,09m³/s
Mean elev.
63m
Administrative coverage
3 dept-equivalent regions (GADM L2)
- 365.9 km²82.3% of basin
- 33.2 km²7.5% of basin
- 2.6 km²0.6% of basin
13 intersecting protected areas
Willapa
IUCN IVNational Wildlife Refuge
56.36 km² overlap
Marine Protected Area
56.20 km² overlap
Ellsworth Creek
IUCN VPrivate Conservation Land
31.91 km² overlap
National Wildlife Refuge
9.90 km² overlap
Reserve Program
5.31 km² overlap
Wildlife Area Complex
3.39 km² overlap
Ellsworth Creek
IUCN VNatural Resources Conservation Area
1.76 km² overlap
National Wildlife Refuge
0.99 km² overlap
HendriCreekson Canyon
IUCN VNatural Resources Conservation Area
0.64 km² overlap
4 more protected areassorted by overlap area
Reserve Program
0.41 km² overlap
National Wildlife Refuge
0.35 km² overlap
Wildlife Area Complex
0.13 km² overlap
Teal Slough
IUCN VNatural Resources Conservation Area
0.03 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 375 distinct species · 201 344 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 36 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 Bear Branch : 24 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 89 interactions GloBI sur 4 types (connectance 12.7%, filtre Serrano α=0.2). 14 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°
9,8°C
Annual rain
2 276mm
Moisture idx (CMI)
0,66
Runoff
1 777mm/an
PET
779mm
AET
670mm
Mean slope
5,8°
Water table
185cm
Forest
96%
Crops
0%
Urban
0%
Protected
23%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)