HydroBASINS lev08 watershed · #7080047210
Bassin de Bayou Lafourche
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 : Ascension, Assumption, Iberville, Lafourche, Terrebonne
Sub-basin area
2 702,5km²
Upstream area
2 702,5km²
Discharge
57,6m³/s
Mean elev.
5m
Administrative coverage
5 dept-equivalent regions (GADM L2)
- 1513.9 km²56.1% of basin
- 700.2 km²25.9% of basin
- 448.0 km²16.6% of basin
- 36.6 km²1.4% of basin
- 0.5 km²0.0% of basin
5 intersecting protected areas
Mandalay
IUCN IVNational Wildlife Refuge
18.66 km² overlap
Reserve Program
2.11 km² overlap
Reserve Program
1.79 km² overlap
Marine Protected Area
0.02 km² overlap
National Historical Park
0.02 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 768 distinct species · 153 753 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 41 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 Bayou Lafourche : 28 espèces reliées par 85 interactions GloBI sur 3 types (connectance 10.4%, 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°
20,2°C
Annual rain
1 611mm
Moisture idx (CMI)
0,14
Runoff
757mm/an
PET
1 382mm
AET
1 247mm
Mean slope
0,2°
Water table
7cm
Forest
42%
Crops
25%
Urban
7%
Protected
1%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)