HydroBASINS lev08 watershed · #7080642770
Bassin de Polk 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 3 administrative regions : Independence, Izard, Sharp
Sub-basin area
449,7km²
Upstream area
449,9km²
Discharge
6,52m³/s
Mean elev.
170m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
3 dept-equivalent regions (GADM L2)
- IndependenceArkansas · United States316.8 km²70.4% of basin
- SharpArkansas · United States75.0 km²16.7% of basin
- IzardArkansas · United States58.0 km²12.9% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
922 distinct species · 10 198 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 Polk Bayou : 36 espèces reliées par 76 interactions GloBI sur 3 types (connectance 6.7%, filtre Serrano α=0.2). 12 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°
14,8°C
Annual rain
1 205mm
Moisture idx (CMI)
-0,09
Runoff
457mm/an
PET
1 327mm
AET
958mm
Mean slope
3,5°
Water table
171cm
Forest
71%
Crops
17%
Urban
3%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)