HydroBASINS lev08 watershed · #7080622600
Bassin de New 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 : Alleghany, Ashe, Grayson, Smyth
Sub-basin area
665,4km²
Upstream area
2 247km²
Discharge
42,47m³/s
Mean elev.
932m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
4 dept-equivalent regions (GADM L2)
- Grayson512.5 km²77.0% of basin
- 148.8 km²22.4% of basin
- 3.6 km²0.5% of basin
- 0.6 km²0.1% of basin
4 intersecting protected areas
Little Wilson Creek
IUCN IbWilderness
22.10 km² overlap
Grayson Highlands
IUCN IIIState Park
10.14 km² overlap
Lewis Fork
IUCN IbWilderness
7.82 km² overlap
The Nature Conservancy
IUCN VEasement
0.08 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 135 distinct species · 91 548 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 37 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 New River : 27 espèces reliées par 72 interactions GloBI sur 4 types (connectance 9.7%, filtre Serrano α=0.2). 12 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°
10,2°C
Annual rain
1 223mm
Moisture idx (CMI)
0,11
Runoff
562mm/an
PET
1 082mm
AET
902mm
Mean slope
8,6°
Water table
381cm
Forest
99%
Crops
26%
Urban
0%
Protected
3%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)