HydroBASINS lev08 watershed · #7080470910
Bassin de Niobrara 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 : Bon Homme, Knox
Sub-basin area
71,3km²
Upstream area
703 428km²
Discharge
1 073,04m³/s
Mean elev.
417m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Missouri River135 km²
- Bassin de Niobrara River58 km²
2 dept-equivalent regions (GADM L2)
- 46.0 km²64.4% of basin
- Knox25.4 km²35.6% of basin
2 intersecting protected areas
State Wildlife Management Area
4.91 km² overlap
State Recreation Area
0.40 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
395 distinct species · 3 633 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 37 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 Niobrara River : 25 espèces reliées par 80 interactions GloBI sur 4 types (connectance 11.4%, filtre Serrano α=0.2). 13 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°
9,4°C
Annual rain
550mm
Moisture idx (CMI)
-0,49
Runoff
123mm/an
PET
1 086mm
AET
471mm
Mean slope
2,0°
Water table
304cm
Forest
23%
Crops
43%
Urban
0%
Protected
19%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)