HydroBASINS lev08 watershed · #7080043090
Bassin de Waccamaw 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 : Georgetown, Horry
Sub-basin area
370,7km²
Upstream area
40 953,3km²
Discharge
548,4m³/s
Mean elev.
1m
Administrative coverage
Hydrographic chain
▼ Drains into
Outlet (drains to ocean / endorheic)
▲ Receives from 2 basins
- Bassin de Bull Creek125 km²
- Bassin de Waccamaw River47 km²
2 dept-equivalent regions (GADM L2)
- 360.3 km²97.2% of basin
- 10.2 km²2.7% of basin
18 intersecting protected areas
Sandy Island
IUCN VPrivate Conservation Land
19.34 km² overlap
Lower Rio Grande Valley
IUCN VNational Wildlife Refuge
15.62 km² overlap
Us-Sc-4-44
IUCN Not AssignedConservation Easement
13.99 km² overlap
Reserve Program
7.30 km² overlap
Samworth
IUCN VWildlife Management Area
5.43 km² overlap
Us-Sc-4-37
IUCN Not AssignedConservation Easement
4.94 km² overlap
National Wildlife Refuge
4.72 km² overlap
Us-Sc-4-2
IUCN Not AssignedConservation Easement
3.08 km² overlap
Us-Sc-4-11
IUCN Not AssignedConservation Easement
2.67 km² overlap
9 more protected areassorted by overlap area
Us-Sc-4-5
IUCN Not AssignedConservation Easement
2.06 km² overlap
Us-Sc-4-60
IUCN Not AssignedConservation Easement
1.49 km² overlap
Us-Sc-4-8
IUCN Not AssignedConservation Easement
1.16 km² overlap
Us-Sc-4-9
IUCN Not AssignedConservation Easement
1.04 km² overlap
Us-Sc-4-3
IUCN Not AssignedConservation Easement
1.02 km² overlap
Reserve Program
0.06 km² overlap
Steiger
IUCN Not AssignedSanctuary
0.05 km² overlap
Us-Sc-4-17
IUCN Not AssignedConservation Easement
0.02 km² overlap
Us-Sc-4-24
IUCN Not AssignedConservation Easement
0.01 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 991 distinct species · 128 677 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 36 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 Waccamaw River : 25 espèces reliées par 71 interactions GloBI sur 4 types (connectance 11.3%, 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°
17,6°C
Annual rain
1 317mm
Moisture idx (CMI)
-0,01
Runoff
443mm/an
PET
1 325mm
AET
1 081mm
Mean slope
0,1°
Water table
14cm
Forest
93%
Crops
4%
Urban
3%
Protected
22%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)