HydroBASINS lev08 watershed · #7080597180
Bassin de Rio Grande Drain
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 : Alamosa, Rio Grande, Saguache
Sub-basin area
528,1km²
Upstream area
6 195,8km²
Discharge
9,19m³/s
Mean elev.
2 311m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de San Luis Creek1893 km²
- Bassin de Franklin Eddy Canal158 km²
3 dept-equivalent regions (GADM L2)
- 361.2 km²68.4% of basin
- 84.8 km²16.1% of basin
- 82.4 km²15.6% of basin
4 intersecting protected areas
Baca
IUCN IVNational Wildlife Refuge
60.22 km² overlap
Lake
51.69 km² overlap
Medano / Zapata Ranch
IUCN VConservation Easement
48.83 km² overlap
Great Sand Dunes
IUCN VNational Preserve
6.41 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
381 distinct species · 2 131 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 32 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 Rio Grande Drain : 18 espèces reliées par 119 interactions GloBI sur 4 types (connectance 22.5%, filtre Serrano α=0.2). 15 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
209mm
Moisture idx (CMI)
-0,81
Runoff
37mm/an
PET
1 111mm
AET
184mm
Mean slope
0,0°
Water table
77cm
Forest
0%
Crops
46%
Urban
0%
Protected
11%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)