HydroBASINS lev08 watershed · #7080724920
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 6 administrative regions : Caldwell, Catahoula, Jackson, La Salle, Morehouse +1
Sub-basin area
1 599,2km²
Upstream area
41 567km²
Discharge
638,17m³/s
Mean elev.
39m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Ouachita River95 km²
- Bassin de Ouachita River34 km²
6 dept-equivalent regions (GADM L2)
- 1046.1 km²65.5% of basin
- Caldwell429.1 km²26.8% of basin
- 106.1 km²6.6% of basin
- Jackson9.6 km²0.6% of basin
- 4.1 km²0.3% of basin
- La Salle3.2 km²0.2% of basin
12 intersecting protected areas
Reserve Program
17.69 km² overlap
Black Bayou Lake
IUCN IVNational Wildlife Refuge
14.75 km² overlap
Reserve Program
11.93 km² overlap
Reserve Program
11.10 km² overlap
Private Conservation Land
4.20 km² overlap
Agricultural Conservation Easement Program - Wetland Reserve Easements (ACEP-WRE), Catahoula, LA
IUCN VConservation Easement
0.67 km² overlap
Us-La-108-6
IUCN Not AssignedConservation Easement
0.59 km² overlap
Agricultural Conservation Easement Program - Wetland Reserve Easements (ACEP-WRE), Ouachita, LA
IUCN VConservation Easement
0.57 km² overlap
Vardie Parsons
IUCN IIIPark
0.40 km² overlap
3 more protected areassorted by overlap area
US-LA-108-5 Wetlands
IUCN Not AssignedReserve Program
0.40 km² overlap
Us-La-108-4
IUCN Not AssignedConservation Easement
0.38 km² overlap
Columbia Nursery - Forestry
IUCN VIForest
0.36 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
3 474 distinct species · 177 293 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 36 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 : 23 espèces reliées par 82 interactions GloBI sur 4 types (connectance 13.0%, 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°
18,1°C
Annual rain
1 364mm
Moisture idx (CMI)
-0,04
Runoff
584mm/an
PET
1 423mm
AET
1 056mm
Mean slope
1,0°
Water table
44cm
Forest
55%
Crops
13%
Urban
8%
Protected
1%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)