HydroBASINS lev08 watershed · #7080699170
Bassin de Big Bayou
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, Chicot, Desha, Drew
Sub-basin area
592,8km²
Upstream area
593,2km²
Discharge
12,25m³/s
Mean elev.
39m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
4 dept-equivalent regions (GADM L2)
- ChicotArkansas · United States351.0 km²59.2% of basin
- AshleyArkansas · United States138.9 km²23.4% of basin
- DeshaArkansas · United States99.9 km²16.9% of basin
- DrewArkansas · United States2.8 km²0.5% of basin
2 intersecting protected areas
Reserve Program
23.62 km² overlap
Conservation Easement
2.16 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
491 distinct species · 2 389 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 46 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 Big Bayou : 33 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 144 interactions GloBI sur 4 types (connectance 13.9%, 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°
17,2°C
Annual rain
1 357mm
Moisture idx (CMI)
-0,01
Runoff
651mm/an
PET
1 369mm
AET
1 012mm
Mean slope
0,1°
Water table
4cm
Forest
23%
Crops
68%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)