HydroBASINS lev08 watershed · #7080387970
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 : Carter, Custer
Sub-basin area
323,5km²
Upstream area
323,6km²
Discharge
0,47m³/s
Mean elev.
965m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
2 dept-equivalent regions (GADM L2)
- Carter304.9 km²94.0% of basin
- Custer19.4 km²6.0% of basin
1 intersecting protected areas
Chalk Buttes
IUCN VEasement
12.82 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
202 distinct species · 387 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 51 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 : 34 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 151 interactions GloBI sur 5 types (connectance 11.8%, filtre Serrano α=0.2). 17 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°
6,4°C
Annual rain
368mm
Moisture idx (CMI)
-0,63
Runoff
47mm/an
PET
1 009mm
AET
322mm
Mean slope
3,5°
Water table
427cm
Forest
0%
Crops
11%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)