HydroBASINS lev08 watershed · #7080041930
Bassin de Nansemond 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 11 administrative regions : Chesapeake, Chesterfield, Hopewell, Isle of Wight, Norfolk +6
Sub-basin area
2 486,8km²
Upstream area
2 486,8km²
Discharge
5,71m³/s
Mean elev.
16m
Administrative coverage
11 dept-equivalent regions (GADM L2)
- Suffolk469.5 km²18.9% of basin
- 420.8 km²16.9% of basin
- 403.6 km²16.2% of basin
- Surry301.1 km²12.1% of basin
- 293.9 km²11.8% of basin
- 243.3 km²9.8% of basin
- Norfolk145.7 km²5.9% of basin
- 92.2 km²3.7% of basin
3 moreFull L2 list
- Hopewell13.7 km² · 0.5%
- Chesterfield0.2 km² · 0.0%
- Petersburg0.0 km² · 0.0%
23 intersecting protected areas
Great Dismal Swamp
IUCN IVNational Wildlife Refuge
111.66 km² overlap
James River
IUCN IVNational Wildlife Refuge
18.70 km² overlap
First Landing
IUCN IIIState Park
11.80 km² overlap
Hog Island
IUCN VWildlife Management Area
9.67 km² overlap
Marine Protected Area
9.59 km² overlap
The Nature Conservancy
IUCN VEasement
7.22 km² overlap
Ragged Island
IUCN VWildlife Management Area
5.95 km² overlap
Us-Va-132-1 / Sur-Vof-2857
IUCN Not AssignedConservation Easement
4.43 km² overlap
North Landing River
IUCN VPrivate Conservation Land
2.72 km² overlap
14 more protected areassorted by overlap area
Marine Protected Area
1.71 km² overlap
Nansemond
IUCN IVNational Wildlife Refuge
1.71 km² overlap
Pleasure House Point
IUCN VNatural Area
0.45 km² overlap
Us-Va-59-1
IUCN Not AssignedConservation Easement
0.40 km² overlap
Prosperity General
IUCN VOpen Space
0.33 km² overlap
Great Dismal Swamp Nw
IUCN VPrivate Conservation Land
0.33 km² overlap
Northwest River
IUCN VPrivate Conservation Land
0.22 km² overlap
Owl Creek General
IUCN VOpen Space
0.16 km² overlap
Nrf-Vof-3995
IUCN Not AssignedConservation Easement
0.07 km² overlap
James River
IUCN VNational Wildlife Refuge
0.01 km² overlap
Greens
0.00 km² overlap
Oak Grove Play Area
IUCN VGrove
0.00 km² overlap
Lucy Joyner Triangle
IUCN VPark
0.00 km² overlap
Reserve Program
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
5 805 distinct species · 1 895 256 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 33 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 Nansemond River : 20 espèces reliées par 82 interactions GloBI sur 3 types (connectance 15.5%, filtre Serrano α=0.2). 13 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°
14,9°C
Annual rain
1 147mm
Moisture idx (CMI)
0,00
Runoff
480mm/an
PET
1 149mm
AET
903mm
Mean slope
0,7°
Water table
27cm
Forest
56%
Crops
19%
Urban
30%
Protected
7%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)