HydroBASINS lev08 watershed · #7080364600
Bassin de Powder 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 : Custer, Prairie
Sub-basin area
1 492,8km²
Upstream area
34 848,1km²
Discharge
39,76m³/s
Mean elev.
847m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Powder River2033 km²
- Bassin de Powder River1082 km²
2 dept-equivalent regions (GADM L2)
- Custer1213.2 km²81.1% of basin
- 283.5 km²18.9% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
343 distinct species · 1 637 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 43 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 Powder River : 28 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 135 interactions GloBI sur 4 types (connectance 14.3%, filtre Serrano α=0.2). 16 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°
6,5°C
Annual rain
343mm
Moisture idx (CMI)
-0,66
Runoff
36mm/an
PET
1 020mm
AET
299mm
Mean slope
3,3°
Water table
528cm
Forest
0%
Crops
6%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)