HydroBASINS lev08 watershed · #7080444510
Bassin de Big Lost 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 1 administrative regions : Custer
Sub-basin area
715,5km²
Upstream area
2 380,1km²
Discharge
13,72m³/s
Mean elev.
2 219m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Big Lost River1293 km²
- Bassin de Thousand Springs Creek372 km²
1 dept-equivalent regions (GADM L2)
- CusterIdaho · United States716.9 km²100.0% of basin
3 intersecting protected areas
Borah Peak
IUCN IbWilderness Study Area
8.27 km² overlap
Chilly Slough
IUCN VWildlife Habitat Area
0.11 km² overlap
Merriam Lake Basin
IUCN IaResearch Natural Area
0.05 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
688 distinct species · 6 542 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 Big Lost River : 27 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 117 interactions GloBI sur 4 types (connectance 12.4%, 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°
2,0°C
Annual rain
345mm
Moisture idx (CMI)
-0,59
Runoff
190mm/an
PET
884mm
AET
299mm
Mean slope
11,9°
Water table
393cm
Forest
47%
Crops
4%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)