HydroBASINS lev08 watershed · #7080688160
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 3 administrative regions : Brunswick, Columbus, Horry
Sub-basin area
1 347,8km²
Upstream area
3 914,1km²
Discharge
54,68m³/s
Mean elev.
7m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Monie Swamp515 km²
- Bassin de Waccamaw River206 km²
3 dept-equivalent regions (GADM L2)
- 1131.1 km²83.9% of basin
- 132.7 km²9.9% of basin
- 83.6 km²6.2% of basin
13 intersecting protected areas
Wildlife Management Area
21.95 km² overlap
Lower Rio Grande Valley
IUCN VNational Wildlife Refuge
17.60 km² overlap
Us-Nc-40-31
IUCN Not AssignedConservation Easement
10.29 km² overlap
Wildlife Management Area
4.77 km² overlap
Reserve Program
2.76 km² overlap
Us-Sc-4-32
IUCN Not AssignedConservation Easement
2.69 km² overlap
Us-Sc-4-36
IUCN Not AssignedConservation Easement
2.47 km² overlap
Waccamaw River
IUCN VPrivate Conservation Land
1.81 km² overlap
North American Land Trust
IUCN Not AssignedEasement
0.73 km² overlap
4 more protected areassorted by overlap area
Wetlands
0.20 km² overlap
Waccamaw River
IUCN VIHeritage Preserve
0.19 km² overlap
Velma Johnson Tract
IUCN Not AssignedConservation Easement
0.13 km² overlap
Waccamaw
IUCN VNational Wildlife Refuge
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 210 distinct species · 121 917 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 42 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 : 32 espèces reliées par 82 interactions GloBI sur 3 types (connectance 9.1%, 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°
17,1°C
Annual rain
1 287mm
Moisture idx (CMI)
-0,03
Runoff
473mm/an
PET
1 323mm
AET
1 068mm
Mean slope
0,2°
Water table
7cm
Forest
51%
Crops
11%
Urban
4%
Protected
5%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)