HydroBASINS lev08 watershed · #7080382690
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 3 administrative regions : Asotin, Garfield, Wallowa
Sub-basin area
631,7km²
Upstream area
9 172km²
Discharge
62,13m³/s
Mean elev.
996m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Grande Ronde River1077 km²
- Bassin de Wenaha River773 km²
3 dept-equivalent regions (GADM L2)
- 407.2 km²64.3% of basin
- 199.8 km²31.5% of basin
- Garfield26.4 km²4.2% of basin
10 intersecting protected areas
Blue Mountains
IUCN VWildlife Area Complex
22.80 km² overlap
4-O Ranch - Dec 2014
IUCN VEnvironmental System
10.39 km² overlap
4-O Ranch - March 2014
IUCN VEnvironmental System
8.69 km² overlap
Wenaha-Tucannon
IUCN IbWilderness
8.03 km² overlap
Designated - Recreational
7.05 km² overlap
Grande Ronde, Oregon
IUCN VWild and Scenic River
7.03 km² overlap
4-O Ranch 2013
IUCN VEnvironmental System
6.37 km² overlap
Wenaha
IUCN VWildlife Area
0.69 km² overlap
Grande Ronde, Oregon
IUCN VWild and Scenic River
0.01 km² overlap
1 more protected areassorted by overlap area
4-O Ranch - Dec 2014
IUCN VEnvironmental System
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 194 distinct species · 20 323 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 45 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 : 29 espèces reliées par 103 interactions GloBI sur 6 types (connectance 9.5%, 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°
7,1°C
Annual rain
549mm
Moisture idx (CMI)
-0,43
Runoff
224mm/an
PET
979mm
AET
461mm
Mean slope
14,9°
Water table
605cm
Forest
80%
Crops
17%
Urban
0%
Protected
3%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)