HydroBASINS lev08 watershed · #7080046910

Bassin de Mississippi River-Gulf Outlet

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 3 administrative regions : Orleans, Saint Bernard, Saint Tammany

Coastal basin 119% lakePfafstetter: 74100901

Sub-basin area

329,2km²

Upstream area

329,2km²

Discharge

2,26m³/s

Mean elev.

Administrative coverage

3 dept-equivalent regions (GADM L2)

Orleans
Louisiana · United States
216.8 km²
65.9% of basin
Saint Bernard
Louisiana · United States
93.1 km²
28.3% of basin
Saint Tammany
Louisiana · United States
0.4 km²
0.1% of basin

8 intersecting protected areas

Bayou Savage National Wildlife Refuge
IUCN IV
Marine Protected Area
35.42 km² overlap
Bayou Sauvage
IUCN IV
National Wildlife Refuge
33.64 km² overlap
Bayou Bienvenue
IUCN V
State Wild or Scenic River
0.55 km² overlap
Bashman Bayou
IUCN V
State Wild or Scenic River
0.17 km² overlap
Lake Borgne Canal (violet Canal)
IUCN V
State Wild or Scenic River
0.11 km² overlap
Bayou Dupre
IUCN V
State Wild or Scenic River
0.07 km² overlap
Terre Beau Bayou
IUCN V
State Wild or Scenic River
0.03 km² overlap
Pirogue Bayou
IUCN V
State Wild or Scenic River
0.02 km² overlap

Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.

Species present

1 504 distinct species · 253 374 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).

RègnesAnimalPlanteChampignonBacterie

RelationsPredationParasitismeSymbiosePollinisation

StatutEn dangerVulnérableProtégéeEndémique

RègnesAnimalPlanteChampignonBacterie

RelationsPredationParasitismeSymbiosePollinisation

StatutEn dangerVulnérableProtégéeEndémique

Indicateurs du tissu écologique

Tissu écologique de Bassin de Mississippi River-Gulf Outlet : 28 espèces reliées par 79 interactions GloBI sur 4 types (connectance 10.7%, filtre Serrano α=0.2). 11 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées

Interactions affichées

Connectance

0.107

Patrimoniales

Plus dense que (national)0 %(top 100%)

Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).

Hydroclimate (BasinATLAS lev08)

Mean T°

20,0°C

Annual rain

1 521mm

Moisture idx (CMI)

0,09

Runoff

663mm/an

PET

1 377mm

AET

1 170mm

Mean slope

0,2°

Water table

5cm

Forest

50%

Crops

Urban

Protected

10%

HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)