HydroBASINS lev08 watershed · #7080699710
Bassin de Red 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 : Bowie, Hempstead, Howard, Lafayette, Little River +1
Sub-basin area
1 975,2km²
Upstream area
137 093,3km²
Discharge
602,61m³/s
Mean elev.
88m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Red River755 km²
- Bassin de Little River221 km²
6 dept-equivalent regions (GADM L2)
- MillerArkansas · United States873.5 km²44.2% of basin
- HempsteadArkansas · United States611.4 km²31.0% of basin
- LafayetteArkansas · United States473.5 km²24.0% of basin
- 13.0 km²0.7% of basin
- Little RiverArkansas · United States2.5 km²0.1% of basin
- HowardArkansas · United States0.6 km²0.0% of basin
12 intersecting protected areas
Reserve Program
82.61 km² overlap
Bois D'arc
IUCN VState Wildlife Management Area
23.84 km² overlap
Reserve Program
17.96 km² overlap
Hope Upland
IUCN VState Wildlife Management Area
7.97 km² overlap
State Wildlife Management Area
4.67 km² overlap
Lafayette
IUCN VWildlife Management Area
4.42 km² overlap
Spring Bank
IUCN VState Wildlife Management Area
2.28 km² overlap
Nacatoch Ravines
IUCN Not AssignedNatural Area
1.21 km² overlap
Private Conservation Land
0.29 km² overlap
3 more protected areassorted by overlap area
Reserve Program
0.15 km² overlap
Nacatoch Ravines Fee
IUCN VPrivate Conservation Land
0.02 km² overlap
Little River
IUCN VState Wildlife Management Area
0.01 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 690 distinct species · 44 068 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 34 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 Red River : 23 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 77 interactions GloBI sur 4 types (connectance 13.7%, filtre Serrano α=0.2). 11 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°
17,3°C
Annual rain
1 252mm
Moisture idx (CMI)
-0,09
Runoff
415mm/an
PET
1 382mm
AET
1 027mm
Mean slope
0,8°
Water table
47cm
Forest
52%
Crops
30%
Urban
1%
Protected
2%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)