HydroBASINS lev08 watershed · #7080385990
Bassin de Grande Ronde 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 : Union, Wallowa
Sub-basin area
1 077,4km²
Upstream area
7 767,6km²
Discharge
53,3m³/s
Mean elev.
1 183m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Wallowa River2481 km²
- Bassin de Grande Ronde River1524 km²
2 dept-equivalent regions (GADM L2)
- 1004.7 km²93.0% of basin
- Union75.4 km²7.0% of basin
7 intersecting protected areas
Grande Ronde, Oregon
IUCN VWild and Scenic River
50.76 km² overlap
Wenaha
IUCN VWildlife Area
26.82 km² overlap
Designated - Wild
26.28 km² overlap
Designated - Recreational
8.77 km² overlap
Designated - Recreational
2.26 km² overlap
Wallowa River
IUCN VDesignated - Recreational
0.45 km² overlap
Wenaha-Tucannon
IUCN IbWilderness
0.19 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 182 distinct species · 15 569 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 Grande Ronde River : 19 espèces reliées par 95 interactions GloBI sur 5 types (connectance 14.3%, filtre Serrano α=0.2). 18 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°
5,6°C
Annual rain
611mm
Moisture idx (CMI)
-0,35
Runoff
242mm/an
PET
951mm
AET
507mm
Mean slope
11,3°
Water table
620cm
Forest
70%
Crops
2%
Urban
0%
Protected
5%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)