HydroBASINS lev08 watershed · #7080047250
Bassin de Grand Bayou Canal
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 2 administrative regions : Lafourche, Terrebonne
Sub-basin area
253,4km²
Upstream area
253,5km²
Discharge
5,52m³/s
Mean elev.
2m
Administrative coverage
2 dept-equivalent regions (GADM L2)
- 145.7 km²57.6% of basin
- 107.4 km²42.4% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
331 distinct species · 14 634 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 39 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 Canal : 27 espèces reliées par 75 interactions GloBI sur 4 types (connectance 9.6%, 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°
20,4°C
Annual rain
1 595mm
Moisture idx (CMI)
0,15
Runoff
739mm/an
PET
1 349mm
AET
1 232mm
Mean slope
0,1°
Water table
6cm
Forest
16%
Crops
17%
Urban
0%
Protected
34%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)