HydroBASINS lev08 watershed · #7080047770
Bassin de Mermentau River
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 : Cameron, Vermilion
Sub-basin area
862,5km²
Upstream area
7 474,2km²
Discharge
148,57m³/s
Mean elev.
2m
Administrative coverage
Hydrographic chain
▼ Drains into
Outlet (drains to ocean / endorheic)
▲ Receives from 2 basins
- Bassin de Bell City Drainage Canal1481 km²
- Bassin de Mermentau River339 km²
2 dept-equivalent regions (GADM L2)
- 803.2 km²93.2% of basin
- Vermilion58.3 km²6.8% of basin
2 intersecting protected areas
Reserve Program
6.26 km² overlap
Easement
5.81 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
652 distinct species · 16 265 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 Mermentau River : 27 espèces reliées par 72 interactions GloBI sur 3 types (connectance 10.8%, filtre Serrano α=0.2). 10 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°
19,9°C
Annual rain
1 478mm
Moisture idx (CMI)
0,10
Runoff
692mm/an
PET
1 324mm
AET
1 154mm
Mean slope
0,0°
Water table
2cm
Forest
18%
Crops
18%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)