HydroBASINS lev08 watershed · #7080014810
Bassin de Lewis and Clark 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 : Clatsop, Multnomah, Tillamook
Sub-basin area
1 291,3km²
Upstream area
1 291,3km²
Discharge
0,68m³/s
Mean elev.
195m
Administrative coverage
3 dept-equivalent regions (GADM L2)
- 1203.1 km²92.9% of basin
- 26.8 km²2.1% of basin
- 7.3 km²0.6% of basin
27 intersecting protected areas
Marine Protected Area
33.96 km² overlap
Lewis And Clark
IUCN IVNational Wildlife Refuge
33.95 km² overlap
National Wildlife Refuge
32.95 km² overlap
Saddle Mountain
IUCN VState Natural Area
12.36 km² overlap
National Wildlife Refuge
11.33 km² overlap
Elmer Feldenheimer
IUCN VState Natural Area
5.93 km² overlap
Refuge
4.96 km² overlap
Saddle Mountain State
IUCN VNatural Area Reserve
4.75 km² overlap
Blind Slough Swamp
IUCN VPrivate Conservation Land
3.24 km² overlap
18 more protected areassorted by overlap area
Cape Falcon Marine Reserve
IUCN IaMarine Protected Area
1.78 km² overlap
Circle Creek
IUCN VPrivate Conservation
1.46 km² overlap
Ecola Creek
IUCN VForest Reserve
0.88 km² overlap
Marine Protected Area
0.53 km² overlap
Shangrila Creek
IUCN VWetlands
0.25 km² overlap
Gearhart Fen
IUCN VPrivate Conservation Land
0.23 km² overlap
Reserve Program
0.21 km² overlap
Research Natural Area
0.13 km² overlap
Forest
0.11 km² overlap
Surf Pines Prarie
IUCN VConservation Easement
0.07 km² overlap
Marine Protected Area
0.05 km² overlap
John Yeon
IUCN VState Natural Site
0.04 km² overlap
Oregon Islands
IUCN IVNational Wildlife Refuge
0.03 km² overlap
Pinehurst
IUCN Not AssignedConservation Easement
0.02 km² overlap
Doris Davis Beaver Marsh
IUCN VWetlands Preserve
0.01 km² overlap
Arch Cape
IUCN VWetlands Preserve
0.01 km² overlap
8th Street
IUCN VForest
0.00 km² overlap
King
IUCN VConservation Easement
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
3 269 distinct species · 539 706 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 30 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 Lewis and Clark River : 20 espèces reliées par 66 interactions GloBI sur 3 types (connectance 13.3%, 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°
9,6°C
Annual rain
2 294mm
Moisture idx (CMI)
0,65
Runoff
1 807mm/an
PET
800mm
AET
673mm
Mean slope
7,9°
Water table
270cm
Forest
96%
Crops
4%
Urban
2%
Protected
7%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)