HydroBASINS lev08 watershed · #7080698850
Bassin de Ouachita 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 : Ashley, Bradley, Calhoun, Union
Sub-basin area
388,3km²
Upstream area
19 049,5km²
Discharge
290,51m³/s
Mean elev.
41m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Ouachita River1367 km²
- Bassin de Ouachita River798 km²
4 dept-equivalent regions (GADM L2)
- BradleyArkansas · United States216.1 km²55.7% of basin
- UnionArkansas · United States171.5 km²44.2% of basin
- CalhounArkansas · United States0.5 km²0.1% of basin
- AshleyArkansas · United States0.0 km²0.0% of basin
2 intersecting protected areas
Felsenthal
IUCN IVNational Wildlife Refuge
72.53 km² overlap
Private Conservation Land
0.04 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
478 distinct species · 2 367 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 43 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 Ouachita River : 28 espèces reliées par 75 interactions GloBI sur 4 types (connectance 7.6%, 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°
16,9°C
Annual rain
1 348mm
Moisture idx (CMI)
-0,04
Runoff
487mm/an
PET
1 402mm
AET
1 039mm
Mean slope
0,7°
Water table
32cm
Forest
100%
Crops
2%
Urban
0%
Protected
19%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)