HydroBASINS lev08 watershed · #7080730590
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 : Long, Wayne
Sub-basin area
538,1km²
Upstream area
35 876,8km²
Discharge
409,11m³/s
Mean elev.
22m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin · #7080728450182 km²
- Bassin de Altamaha River123 km²
2 dept-equivalent regions (GADM L2)
- 454.1 km²84.5% of basin
- 83.6 km²15.5% of basin
10 intersecting protected areas
Townsend
IUCN VWildlife Management Area
70.47 km² overlap
Griffin Ridge
IUCN VWildlife Management Area
27.60 km² overlap
Penholoway Swamp
IUCN VWildlife Management Area
18.91 km² overlap
Reserve Program
6.33 km² overlap
Georgia-Alabama Land Trust Easement #862
IUCN Not AssignedEasement
4.76 km² overlap
Altamaha-Rayonier
IUCN VState Natural Area
4.20 km² overlap
Altamaha River Megasite
IUCN VEasement
4.07 km² overlap
Easement
3.23 km² overlap
Georgia-Alabama Land Trust Easement #768
IUCN Not AssignedEasement
1.38 km² overlap
1 more protected areassorted by overlap area
Reserve Program
0.16 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
830 distinct species · 7 263 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 46 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 : 34 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 82 interactions GloBI sur 4 types (connectance 7.6%, filtre Serrano α=0.2). 13 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°
19,2°C
Annual rain
1 254mm
Moisture idx (CMI)
-0,13
Runoff
338mm/an
PET
1 445mm
AET
1 061mm
Mean slope
0,5°
Water table
25cm
Forest
91%
Crops
2%
Urban
0%
Protected
7%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)