HydroBASINS lev08 watershed · #7080737190
Bassin de Attoyac 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 : Nacogdoches, Rusk, San Augustine, Shelby
Sub-basin area
1 740km²
Upstream area
1 740km²
Discharge
17,45m³/s
Mean elev.
111m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
4 dept-equivalent regions (GADM L2)
- 707.2 km²40.7% of basin
- 431.2 km²24.8% of basin
- Shelby422.2 km²24.3% of basin
- 178.0 km²10.2% of basin
2 intersecting protected areas
Turkey Hill
IUCN IbWilderness
0.37 km² overlap
Preserve
0.15 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 476 distinct species · 18 525 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 44 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 Attoyac Bayou : 33 espèces reliées par 74 interactions GloBI sur 4 types (connectance 7.8%, 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°
18,2°C
Annual rain
1 220mm
Moisture idx (CMI)
-0,16
Runoff
322mm/an
PET
1 455mm
AET
1 018mm
Mean slope
1,7°
Water table
118cm
Forest
95%
Crops
12%
Urban
0%
Protected
2%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)