HydroBASINS lev08 watershed · #7080686350
Bassin de Little Missouri 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 : Nevada, Ouachita
Sub-basin area
488,4km²
Upstream area
488,4km²
Discharge
6,99m³/s
Mean elev.
95m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
2 dept-equivalent regions (GADM L2)
- NevadaArkansas · United States487.6 km²99.9% of basin
- OuachitaArkansas · United States0.6 km²0.1% of basin
2 intersecting protected areas
Wildlife Management Area
11.59 km² overlap
Arkansas Oak
IUCN VNatural Area
0.17 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
532 distinct species · 1 250 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 Little Missouri River : 39 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 146 interactions GloBI sur 4 types (connectance 10.6%, filtre Serrano α=0.2). 14 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°
16,8°C
Annual rain
1 331mm
Moisture idx (CMI)
-0,04
Runoff
451mm/an
PET
1 389mm
AET
1 048mm
Mean slope
1,6°
Water table
78cm
Forest
100%
Crops
2%
Urban
0%
Protected
3%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)