HydroBASINS lev08 watershed · #7080584820
Bassin de San Miguel 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 5 administrative regions : Dolores, Montrose, Ouray, San Juan, San Miguel
Sub-basin area
1 366,2km²
Upstream area
1 366,2km²
Discharge
6,81m³/s
Mean elev.
2 875m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
5 dept-equivalent regions (GADM L2)
- San Miguel1244.8 km²91.1% of basin
- 111.2 km²8.1% of basin
- 7.8 km²0.6% of basin
- 2.7 km²0.2% of basin
- San Juan0.4 km²0.0% of basin
16 intersecting protected areas
Lizard Head
IUCN IbWilderness
81.92 km² overlap
Mount Sneffels
IUCN IbWilderness
40.66 km² overlap
San Miguel
IUCN VEasement
10.80 km² overlap
West Dalla Creek
IUCN VEasement
2.52 km² overlap
Mystic Valley Ranch A&R
IUCN Not AssignedConservation Easement
1.29 km² overlap
Bear Creek Canyon
IUCN Not AssignedConservation Easement
1.27 km² overlap
San Miguel River Canyon
IUCN VPreserve
1.20 km² overlap
Land Trust Land
IUCN VLocal Land Trust Lands
1.12 km² overlap
Grizzly Peak
IUCN IaResearch Natural Area
0.74 km² overlap
7 more protected areassorted by overlap area
Sunshine Mesa
IUCN VEasement
0.52 km² overlap
Preserve
0.29 km² overlap
Stemmler
IUCN Not AssignedConservation Easement
0.14 km² overlap
San Miguel
IUCN VState Wildlife Area
0.12 km² overlap
Ophir
IUCN Not AssignedConservation Easement
0.07 km² overlap
San Miguel
IUCN VEasement
0.06 km² overlap
Kentucky Placer
IUCN Not AssignedConservation Easement
0.01 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 092 distinct species · 64 560 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 40 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 San Miguel River : 29 espèces reliées par 87 interactions GloBI sur 5 types (connectance 11.2%, filtre Serrano α=0.2). 11 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°
2,7°C
Annual rain
664mm
Moisture idx (CMI)
-0,26
Runoff
134mm/an
PET
926mm
AET
524mm
Mean slope
13,0°
Water table
618cm
Forest
67%
Crops
3%
Urban
0%
Protected
16%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)