HydroBASINS lev08 watershed · #7080751050
Bassin de 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 3 administrative regions : Pearl River, Saint Tammany, Washington
Sub-basin area
720,1km²
Upstream area
17 511km²
Discharge
309,79m³/s
Mean elev.
48m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Pearl River2497 km²
- Bassin de East Fork Pushepatapa Creek402 km²
3 dept-equivalent regions (GADM L2)
- Washington395.5 km²55.0% of basin
- 275.3 km²38.3% of basin
- 48.6 km²6.8% of basin
13 intersecting protected areas
Bogue Chitto
IUCN IVNational Wildlife Refuge
66.32 km² overlap
Old River
IUCN VState Conservation Area
59.70 km² overlap
National Wildlife Refuge
21.47 km² overlap
Reserve Program
3.21 km² overlap
Conservation Easement
1.77 km² overlap
Agricultural Conservation Easement Program - Wetland Reserve Easements (ACEP-WRE), Washington, LA
IUCN Not AssignedConservation Easement
1.77 km² overlap
Old Ri
IUCN VPRIVATE
0.70 km² overlap
Private Conservation Land
0.41 km² overlap
Conservation Easement
0.39 km² overlap
4 more protected areassorted by overlap area
Private
IUCN VPRIVATE
0.35 km² overlap
Holmes Bayou
IUCN VState Wild or Scenic River
0.23 km² overlap
Bradley Slough (bayou)
IUCN VState Wild or Scenic River
0.03 km² overlap
National Wildlife Refuge
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 854 distinct species · 26 427 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 40 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 Pearl River : 29 espèces reliées par 74 interactions GloBI sur 4 types (connectance 9.0%, filtre Serrano α=0.2). 12 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°
19,0°C
Annual rain
1 607mm
Moisture idx (CMI)
0,09
Runoff
628mm/an
PET
1 456mm
AET
1 200mm
Mean slope
0,9°
Water table
42cm
Forest
87%
Crops
8%
Urban
2%
Protected
17%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)