HydroBASINS lev08 watershed · #7080581840
Bassin de Colorado 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 : Grand, San Juan
Sub-basin area
676,2km²
Upstream area
66 311,7km²
Discharge
258,53m³/s
Mean elev.
1 505m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Hatch Wash1674 km²
- Bassin de Pack Creek423 km²
2 dept-equivalent regions (GADM L2)
- San JuanUtah · United States474.8 km²70.2% of basin
- GrandUtah · United States201.9 km²29.8% of basin
1 intersecting protected areas
Canyonlands
IUCN IINational Park
173.30 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
702 distinct species · 15 600 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 50 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 Colorado River : 34 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 134 interactions GloBI sur 4 types (connectance 10.5%, filtre Serrano α=0.2). 17 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°
11,6°C
Annual rain
244mm
Moisture idx (CMI)
-0,81
Runoff
28mm/an
PET
1 316mm
AET
208mm
Mean slope
10,5°
Water table
1 012cm
Forest
0%
Crops
1%
Urban
0%
Protected
26%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)