HydroBASINS lev08 watershed · #7080388180
Bassin de Milton Creek
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 : Columbia, Multnomah, Washington
Sub-basin area
485,9km²
Upstream area
485,9km²
Discharge
17,91m³/s
Mean elev.
167m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
3 dept-equivalent regions (GADM L2)
- Columbia354.5 km²72.8% of basin
- 113.7 km²23.3% of basin
- Washington18.9 km²3.9% of basin
14 intersecting protected areas
Sauvie Island
IUCN VWildlife Area
39.67 km² overlap
Burlington Bottoms
IUCN VMitigation Land
1.75 km² overlap
Burlington Bottoms
IUCN VLocal Conservation Area
1.75 km² overlap
McCarthy Creek
IUCN VNatural Area
1.63 km² overlap
Ennis Creek
IUCN VForest
1.27 km² overlap
Burlington Creek
IUCN VForest
1.21 km² overlap
Natural Area
1.12 km² overlap
Reserve Program
0.70 km² overlap
Reserve Program
0.49 km² overlap
5 more protected areassorted by overlap area
Howell South
IUCN VLocal Conservation Area
0.43 km² overlap
Flight's End
IUCN VEnvironmental System
0.41 km² overlap
Us-Or-113-1
IUCN Not AssignedConservation Easement
0.39 km² overlap
Natural Area
0.19 km² overlap
Forest
IUCN IIIPark
0.02 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 121 distinct species · 733 856 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 32 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 Milton Creek : 21 espèces reliées par 82 interactions GloBI sur 3 types (connectance 16.5%, filtre Serrano α=0.2). 11 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°
10,5°C
Annual rain
1 340mm
Moisture idx (CMI)
0,26
Runoff
1 163mm/an
PET
942mm
AET
631mm
Mean slope
5,8°
Water table
183cm
Forest
69%
Crops
15%
Urban
4%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)