HydroBASINS lev08 watershed · #7080042310
Bassin de Roanoke 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 : Bertie, Martin, Washington
Sub-basin area
448,2km²
Upstream area
24 471km²
Discharge
312,01m³/s
Mean elev.
12m
Administrative coverage
Hydrographic chain
▼ Drains into
Outlet (drains to ocean / endorheic)
▲ Receives from 2 basins
- Bassin de Hardison Mill Creek326 km²
- Bassin de Roanoke River25 km²
3 dept-equivalent regions (GADM L2)
- Martin209.4 km²46.7% of basin
- 121.4 km²27.1% of basin
- Washington117.4 km²26.2% of basin
7 intersecting protected areas
Private Conservation Land
24.95 km² overlap
Roanoke River
IUCN IVNational Wildlife Refuge
23.31 km² overlap
Conservation Easement
6.82 km² overlap
Reserve Program
2.82 km² overlap
East Dismal Swamp
IUCN VEasement
0.62 km² overlap
Roanoke River
IUCN VPreserve
0.48 km² overlap
Cooper Swamp-Modlin Site
IUCN Not AssignedConservation Easement
0.17 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
686 distinct species · 11 678 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 38 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 Roanoke River : 30 espèces reliées par 81 interactions GloBI sur 3 types (connectance 10.9%, 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°
15,7°C
Annual rain
1 256mm
Moisture idx (CMI)
-0,01
Runoff
436mm/an
PET
1 265mm
AET
1 013mm
Mean slope
0,5°
Water table
12cm
Forest
79%
Crops
19%
Urban
0%
Protected
22%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)