HydroBASINS lev08 watershed · #7080616080
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 6 administrative regions : Alleghany, Carroll, Galax, Grayson, Surry +1
Sub-basin area
904km²
Upstream area
3 449,6km²
Discharge
64,49m³/s
Mean elev.
808m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de New River665 km²
- Bassin de Little River299 km²
6 dept-equivalent regions (GADM L2)
- Grayson480.4 km²53.1% of basin
- Carroll377.1 km²41.7% of basin
- 23.6 km²2.6% of basin
- 21.6 km²2.4% of basin
- 1.7 km²0.2% of basin
- 0.0 km²0.0% of basin
7 intersecting protected areas
Crooked Creek
IUCN VWildlife Management Area
7.42 km² overlap
Crl-Vof-4010
IUCN Not AssignedConservation Easement
0.92 km² overlap
Gra-Vof-4015
IUCN Not AssignedConservation Easement
0.64 km² overlap
Crl-Vof-4014
IUCN Not AssignedConservation Easement
0.26 km² overlap
Grayson Glades
IUCN VState Natural Area Preserve
0.21 km² overlap
Big Spring Bog
IUCN VState Natural Area Preserve
0.19 km² overlap
Reserve Program
0.14 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 452 distinct species · 47 430 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 New River : 30 espèces reliées par 76 interactions GloBI sur 4 types (connectance 8.8%, 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°
10,7°C
Annual rain
1 117mm
Moisture idx (CMI)
-0,01
Runoff
558mm/an
PET
1 129mm
AET
882mm
Mean slope
6,9°
Water table
343cm
Forest
98%
Crops
21%
Urban
1%
Protected
2%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)