HydroBASINS lev08 watershed · #7080046870
Bassin de West Pearl 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 1 administrative regions : Saint Tammany
Sub-basin area
164,4km²
Upstream area
20 909,6km²
Discharge
372,24m³/s
Mean elev.
13m
Administrative coverage
Hydrographic chain
▼ Drains into
Outlet (drains to ocean / endorheic)
▲ Receives from 2 basins
- Bassin de Pearl River720 km²
- Bassin de Bogue Chitto529 km²
1 dept-equivalent regions (GADM L2)
- 164.2 km²100.0% of basin
7 intersecting protected areas
Bogue Chitto
IUCN IVNational Wildlife Refuge
4.54 km² overlap
West Pearl River
IUCN VState Wild or Scenic River
3.99 km² overlap
Conservation Easement
2.65 km² overlap
Agricultural Conservation Easement Program - Wetland Reserve Easements (ACEP-WRE), St. Tammany, LA
IUCN Not AssignedConservation Easement
2.65 km² overlap
National Wildlife Refuge
0.20 km² overlap
Morgan River
IUCN VState Wild or Scenic River
0.01 km² overlap
Holmes Bayou
IUCN VState Wild or Scenic River
0.01 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
886 distinct species · 28 700 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 West Pearl River : 30 espèces reliées par 77 interactions GloBI sur 3 types (connectance 9.4%, 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 539mm
Moisture idx (CMI)
0,09
Runoff
628mm/an
PET
1 407mm
AET
1 172mm
Mean slope
0,5°
Water table
18cm
Forest
82%
Crops
3%
Urban
13%
Protected
5%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)