HydroBASINS lev08 watershed · #7080042180
Bassin de Perquimans 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 4 administrative regions : Chowan, Gates, Pasquotank, Perquimans
Sub-basin area
365,7km²
Upstream area
365,8km²
Discharge
5,07m³/s
Mean elev.
12m
Administrative coverage
4 dept-equivalent regions (GADM L2)
- 273.6 km²74.8% of basin
- 52.9 km²14.5% of basin
- 35.7 km²9.8% of basin
- 2.9 km²0.8% of basin
1 intersecting protected areas
Great Dismal Swamp
IUCN IVNational Wildlife Refuge
0.31 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
248 distinct species · 1 500 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 46 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 Perquimans River : 37 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 100 interactions GloBI sur 4 types (connectance 9.7%, 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°
15,4°C
Annual rain
1 226mm
Moisture idx (CMI)
0,02
Runoff
474mm/an
PET
1 203mm
AET
972mm
Mean slope
0,6°
Water table
18cm
Forest
41%
Crops
57%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)