HydroBASINS lev08 watershed · #7080043450
Bassin de Great Swamp
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 4 administrative regions : Beaufort, Chatham, Hampton, Jasper
Sub-basin area
1 454,7km²
Upstream area
1 454,7km²
Discharge
4,25m³/s
Mean elev.
12m
Administrative coverage
4 dept-equivalent regions (GADM L2)
- Jasper786.6 km²54.1% of basin
- Beaufort575.7 km²39.6% of basin
- 3.2 km²0.2% of basin
- 0.0 km²0.0% of basin
28 intersecting protected areas
Marine Protected Area
16.39 km² overlap
Daws Island
IUCN IIIHeritage Preserve
10.33 km² overlap
Red Bluff Marsh
IUCN VPrivate Conservation Land
9.76 km² overlap
Us-Sc-8-29
IUCN Not AssignedConservation Easement
8.45 km² overlap
Us-Sc-8-7
IUCN Not AssignedConservation Easement
6.96 km² overlap
Marine Protected Area
6.66 km² overlap
Turtle Island
IUCN VWildlife Management Area
6.66 km² overlap
Pinckney Island
IUCN IVNational Wildlife Refuge
6.14 km² overlap
Wildlife Management Area
4.32 km² overlap
19 more protected areassorted by overlap area
Atlantic Coast Conservancy/Pelican Coast Conservancy Conservation Easement E201686A
IUCN Not AssignedConservation Easement
3.65 km² overlap
Marine Protected Area
2.73 km² overlap
Sea Pines
IUCN VForest Preserve
2.37 km² overlap
Us-Sc-8-4
IUCN Not AssignedConservation Easement
1.15 km² overlap
Reserve Program
0.92 km² overlap
Waddell Mariculture Center
IUCN Not AssignedResearch Center / Fish Hatchery
0.52 km² overlap
Preserve
0.32 km² overlap
Preserve
0.28 km² overlap
Audubon Newhall
IUCN VPreserve
0.20 km² overlap
Preserve
0.07 km² overlap
Preserve
0.05 km² overlap
Preserve
0.04 km² overlap
Preserve
0.03 km² overlap
Preserve
0.02 km² overlap
Greens Shell Enclosure
IUCN IIIHeritage Preserve
0.01 km² overlap
Greens Shell
IUCN IIIPark
0.01 km² overlap
Preserve
0.01 km² overlap
Long Cove Tract
IUCN Not AssignedConservation Easement
0.01 km² overlap
Us-Sc-9-20
IUCN Not AssignedConservation Easement
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
3 586 distinct species · 758 963 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 Great Swamp : 31 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 63 interactions GloBI sur 3 types (connectance 7.3%, 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°
18,7°C
Annual rain
1 268mm
Moisture idx (CMI)
-0,06
Runoff
314mm/an
PET
1 351mm
AET
1 072mm
Mean slope
0,6°
Water table
30cm
Forest
78%
Crops
4%
Urban
8%
Protected
3%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)