HydroBASINS lev08 watershed · #7080457130
Bassin de West Fork Silvies 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 : Harney
Sub-basin area
25,4km²
Upstream area
3 762,4km²
Discharge
4m³/s
Mean elev.
1 247m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Silvies River802 km²
- Bassin de West Fork Silvies River622 km²
1 dept-equivalent regions (GADM L2)
- 25.5 km²100.0% of basin
1 intersecting protected areas
Malheur
IUCN IVNational Wildlife Refuge
19.59 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
230 distinct species · 5 076 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 24 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 West Fork Silvies River : 15 espèces reliées par 83 interactions GloBI sur 3 types (connectance 25.5%, 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°
7,5°C
Annual rain
262mm
Moisture idx (CMI)
-0,76
Runoff
93mm/an
PET
1 088mm
AET
228mm
Mean slope
0,0°
Water table
12cm
Forest
0%
Crops
0%
Urban
0%
Protected
77%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)