HydroBASINS lev08 watershed · #7080628720
Bassin de Chowan 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 2 administrative regions : Gates, Hertford
Sub-basin area
278,3km²
Upstream area
11 193km²
Discharge
150,36m³/s
Mean elev.
16m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Chowan River111 km²
- Bassin de Potecasi Creek4 km²
2 dept-equivalent regions (GADM L2)
- 221.1 km²79.4% of basin
- 57.3 km²20.6% of basin
1 intersecting protected areas
Chowan Swamp
IUCN VState Natural Area
13.17 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
589 distinct species · 2 865 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 44 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 Chowan River : 35 espèces reliées par 74 interactions GloBI sur 5 types (connectance 7.8%, 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°
15,0°C
Annual rain
1 205mm
Moisture idx (CMI)
-0,02
Runoff
477mm/an
PET
1 227mm
AET
963mm
Mean slope
0,8°
Water table
21cm
Forest
93%
Crops
23%
Urban
0%
Protected
14%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)