HydroBASINS lev08 watershed · #7080397170
Bassin de John Day 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 2 administrative regions : Gilliam, Sherman
Sub-basin area
1 224km²
Upstream area
18 426,9km²
Discharge
74,76m³/s
Mean elev.
610m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Thirtymile Creek701 km²
- Bassin de Pine Hollow2 km²
2 dept-equivalent regions (GADM L2)
- 860.2 km²70.1% of basin
- Sherman366.6 km²29.9% of basin
3 intersecting protected areas
Lower John Day
IUCN IbWilderness Study Area
102.80 km² overlap
John Day River
IUCN VDesignated - Recreational
91.25 km² overlap
Thirtymile
IUCN IbWilderness Study Area
30.67 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
619 distinct species · 19 285 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 John Day River : 24 espèces reliées par 118 interactions GloBI sur 4 types (connectance 16.8%, 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
294mm
Moisture idx (CMI)
-0,72
Runoff
91mm/an
PET
1 039mm
AET
255mm
Mean slope
9,9°
Water table
902cm
Forest
1%
Crops
44%
Urban
0%
Protected
3%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)