HydroBASINS lev08 watershed · #7080043640
Bassin de Altamaha 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 : Glynn, McIntosh
Sub-basin area
398,9km²
Upstream area
37 509,7km²
Discharge
421,64m³/s
Mean elev.
10m
Administrative coverage
Hydrographic chain
▼ Drains into
Outlet (drains to ocean / endorheic)
▲ Receives from 2 basins
- Bassin de Altamaha River306 km²
- Bassin de Altamaha River243 km²
2 dept-equivalent regions (GADM L2)
- 277.4 km²69.6% of basin
- 121.1 km²30.4% of basin
9 intersecting protected areas
Altamaha
IUCN VWildlife Management Area
94.60 km² overlap
Marine Protected Area
90.55 km² overlap
Clayhole Swamp
IUCN VWildlife Management Area
21.12 km² overlap
Paulks Pasture
IUCN VWildlife Management Area
8.11 km² overlap
Sansavilla
IUCN VWildlife Management Area
3.92 km² overlap
Marine Protected Area
3.87 km² overlap
Carrs Island
IUCN VPreserve
1.45 km² overlap
Townsend
IUCN VWildlife Management Area
0.87 km² overlap
Glynn County
IUCN IIIGreenspace
0.26 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 885 distinct species · 198 214 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 Altamaha River : 25 espèces reliées par 72 interactions GloBI sur 3 types (connectance 10.8%, 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°
19,3°C
Annual rain
1 291mm
Moisture idx (CMI)
-0,05
Runoff
329mm/an
PET
1 357mm
AET
1 092mm
Mean slope
0,5°
Water table
21cm
Forest
94%
Crops
1%
Urban
0%
Protected
27%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)