HydroBASINS lev08 watershed · #7080597190
Bassin de Sand Creek
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 4 administrative regions : Alamosa, Custer, Huerfano, Saguache
Sub-basin area
217,3km²
Upstream area
217,3km²
Discharge
0,05m³/s
Mean elev.
2 726m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
4 dept-equivalent regions (GADM L2)
- 175.9 km²80.9% of basin
- 40.4 km²18.6% of basin
- Custer1.1 km²0.5% of basin
- 0.0 km²0.0% of basin
8 intersecting protected areas
Great Sand Dunes
IUCN VNational Preserve
169.96 km² overlap
Sangre de Cristo
IUCN IbWilderness Area
79.54 km² overlap
Great Sand Dunes
IUCN IbWilderness Area
38.31 km² overlap
Lake
26.54 km² overlap
Baca
IUCN IVNational Wildlife Refuge
1.23 km² overlap
Medano / Zapata Ranch
IUCN VConservation Easement
0.60 km² overlap
Deadman Creek
IUCN IaResearch Natural Area
0.16 km² overlap
Medano/Zapata Ranch
IUCN VNational Land Trust Lands
0.16 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
634 distinct species · 9 453 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 33 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 Sand Creek : 23 espèces reliées par 75 interactions GloBI sur 3 types (connectance 14.2%, filtre Serrano α=0.2). 10 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°
3,8°C
Annual rain
391mm
Moisture idx (CMI)
-0,55
Runoff
7mm/an
PET
978mm
AET
325mm
Mean slope
10,7°
Water table
691cm
Forest
45%
Crops
3%
Urban
0%
Protected
79%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)