HydroBASINS lev08 watershed · #7080759230
Bassin de Grand 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 5 administrative regions : Avoyelles, Iberia, Saint Landry, Saint Martin, Saint Mary
Sub-basin area
1 885km²
Upstream area
1 885,8km²
Discharge
41,77m³/s
Mean elev.
10m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
5 dept-equivalent regions (GADM L2)
- 607.4 km²32.3% of basin
- 572.1 km²30.4% of basin
- 359.8 km²19.1% of basin
- 236.9 km²12.6% of basin
- 106.8 km²5.7% of basin
8 intersecting protected areas
Lake Fausse Pointe
IUCN VState Park
22.55 km² overlap
Reserve Program
22.38 km² overlap
Reserve Program
3.10 km² overlap
Agricultural Conservation Easement Program - Wetland Reserve Easements (ACEP-WRE), St. Landry, LA
IUCN VConservation Easement
2.02 km² overlap
Agricultural Conservation Easement Program - Wetland Reserve Easements (ACEP-WRE), Avoyelles, LA
IUCN VConservation Easement
0.54 km² overlap
Conservation Easement
0.54 km² overlap
Reserve Program
0.37 km² overlap
Conservation Easement
0.20 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 486 distinct species · 42 593 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 37 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 Grand Bayou : 26 espèces reliées par 74 interactions GloBI sur 3 types (connectance 11.1%, 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°
19,4°C
Annual rain
1 518mm
Moisture idx (CMI)
0,07
Runoff
737mm/an
PET
1 409mm
AET
1 175mm
Mean slope
0,4°
Water table
16cm
Forest
49%
Crops
25%
Urban
0%
Protected
1%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)