HydroBASINS lev08 watershed · #7080626640
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 3 administrative regions : Gates, Hertford, Suffolk
Sub-basin area
110,7km²
Upstream area
6 755km²
Discharge
92,72m³/s
Mean elev.
14m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Nottoway River2303 km²
- Bassin de Blackwater River2174 km²
3 dept-equivalent regions (GADM L2)
- 80.0 km²72.2% of basin
- 30.5 km²27.6% of basin
- Suffolk0.2 km²0.2% of basin
1 intersecting protected areas
South Quay Sandhills
IUCN VState Natural Area Preserve
0.04 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
588 distinct species · 4 146 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 41 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 : 27 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 122 interactions GloBI sur 5 types (connectance 14.2%, filtre Serrano α=0.2). 15 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 194mm
Moisture idx (CMI)
-0,03
Runoff
481mm/an
PET
1 235mm
AET
959mm
Mean slope
0,7°
Water table
20cm
Forest
100%
Crops
27%
Urban
0%
Protected
23%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)