HydroBASINS lev08 watershed · #7080728180
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 3 administrative regions : Long, Tattnall, Wayne
Sub-basin area
122,8km²
Upstream area
35 157km²
Discharge
403,32m³/s
Mean elev.
28m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Altamaha River313 km²
- Bassin de Altamaha River285 km²
3 dept-equivalent regions (GADM L2)
- 93.0 km²75.8% of basin
- 29.7 km²24.2% of basin
- 0.0 km²0.0% of basin
4 intersecting protected areas
Reserve Program
21.02 km² overlap
Conservation Easement
1.56 km² overlap
Georgia-Alabama Land Trust Easement #862
IUCN Not AssignedEasement
1.36 km² overlap
Georgia-Alabama Land Trust Easement #768
IUCN Not AssignedEasement
0.03 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
147 distinct species · 518 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 47 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 : 38 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 85 interactions GloBI sur 4 types (connectance 7.9%, filtre Serrano α=0.2). 9 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°
19,1°C
Annual rain
1 234mm
Moisture idx (CMI)
-0,16
Runoff
351mm/an
PET
1 463mm
AET
1 044mm
Mean slope
0,7°
Water table
45cm
Forest
92%
Crops
5%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)