HydroBASINS lev08 watershed · #7080449670
Bassin de Cheyenne 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 : Custer, Fall River, Shannon
Sub-basin area
2 275,3km²
Upstream area
25 779,5km²
Discharge
34,4m³/s
Mean elev.
1 118m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Horsehead Creek714 km²
- Bassin de Cheyenne River326 km²
3 dept-equivalent regions (GADM L2)
- Custer1136.7 km²49.9% of basin
- 955.5 km²41.9% of basin
- Shannon187.4 km²8.2% of basin
15 intersecting protected areas
Wind Cave
IUCN IINational Park
137.30 km² overlap
Custer
IUCN VState Park
84.19 km² overlap
Wildlife Preserve
31.12 km² overlap
State Wildlife Management Area
18.71 km² overlap
State Wildlife Management Area
12.41 km² overlap
Romey
IUCN VState Wildlife Management Area
3.73 km² overlap
Conservation Easement
3.47 km² overlap
Sherbarth
IUCN VState Wildlife Management Area
2.66 km² overlap
Oral
IUCN VState Wildlife Management Area
2.59 km² overlap
6 more protected areassorted by overlap area
Angostura
IUCN VRecreation Area
2.41 km² overlap
Sheps Canyon
IUCN VRecreation Area
2.29 km² overlap
Reserve Program
1.25 km² overlap
Cheyenne River Canyons
IUCN VEasement
0.79 km² overlap
Buffalo Gap
IUCN VState Wildlife Management Area
0.65 km² overlap
Petty, Claire
IUCN VConservation Easement
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 249 distinct species · 70 235 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 44 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 Cheyenne River : 34 espèces reliées par 98 interactions GloBI sur 4 types (connectance 10.4%, 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°
8,2°C
Annual rain
433mm
Moisture idx (CMI)
-0,61
Runoff
47mm/an
PET
1 107mm
AET
373mm
Mean slope
3,8°
Water table
477cm
Forest
35%
Crops
14%
Urban
0%
Protected
11%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)