HydroBASINS lev08 watershed · #7080386560
Bassin de Umatilla 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 : Umatilla
Sub-basin area
40,8km²
Upstream area
6 517,7km²
Discharge
21,92m³/s
Mean elev.
142m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Despain Gulch562 km²
- Bassin de Milk Canyon500 km²
1 dept-equivalent regions (GADM L2)
- 40.9 km²100.0% of basin
3 intersecting protected areas
Wanaket
IUCN VWildlife Area
2.33 km² overlap
Power City
IUCN VWildlife Area
0.42 km² overlap
Irrigon
IUCN VWildlife Area
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
207 distinct species · 1 039 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 38 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 Umatilla River : 21 espèces reliées par 131 interactions GloBI sur 5 types (connectance 16.8%, filtre Serrano α=0.2). 19 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°
11,8°C
Annual rain
227mm
Moisture idx (CMI)
-0,80
Runoff
25mm/an
PET
1 112mm
AET
199mm
Mean slope
1,5°
Water table
455cm
Forest
56%
Crops
56%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)