HydroBASINS lev08 watershed · #7080470970
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 4 administrative regions : Brown, Cherry, Keya Paha, Todd
Sub-basin area
1 185,2km²
Upstream area
21 676,4km²
Discharge
7,98m³/s
Mean elev.
776m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Minnechaduza Creek1052 km²
- Bassin de Niobrara River491 km²
4 dept-equivalent regions (GADM L2)
- 724.0 km²61.0% of basin
- 249.4 km²21.0% of basin
- Brown201.6 km²17.0% of basin
- Todd12.2 km²1.0% of basin
5 intersecting protected areas
Preserve
201.18 km² overlap
Fort Niobrara
IUCN IVNational Wildlife Refuge
61.80 km² overlap
Niobrara Valley
IUCN VPreserve Easement
28.49 km² overlap
National Wildlife Refuge
18.74 km² overlap
Niobrara
IUCN VNational Scenic River
0.75 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 614 distinct species · 40 373 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 Niobrara River : 29 espèces reliées par 124 interactions GloBI sur 4 types (connectance 12.5%, 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°
8,7°C
Annual rain
524mm
Moisture idx (CMI)
-0,52
Runoff
59mm/an
PET
1 087mm
AET
449mm
Mean slope
1,7°
Water table
324cm
Forest
1%
Crops
17%
Urban
0%
Protected
28%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)