HydroBASINS lev08 watershed · #7080625600
Bassin de South Fork Holston 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 5 administrative regions : Bristol, Carter, Johnson, Sullivan, Washington
Sub-basin area
674,7km²
Upstream area
2 126,1km²
Discharge
41,1m³/s
Mean elev.
606m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
5 dept-equivalent regions (GADM L2)
- Sullivan412.0 km²61.1% of basin
- Washington240.5 km²35.6% of basin
- Carter18.7 km²2.8% of basin
- Johnson2.8 km²0.4% of basin
- Bristol0.9 km²0.1% of basin
2 intersecting protected areas
Wildlife Management Area
149.03 km² overlap
Agricultural Conservation Easement Program - Wetland Reserve Easements (ACEP-WRE), Washington, VA
IUCN VConservation Easement
0.30 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 986 distinct species · 191 883 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 38 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 South Fork Holston River : 30 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 74 interactions GloBI sur 3 types (connectance 10.5%, filtre Serrano α=0.2). 8 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°
12,1°C
Annual rain
1 161mm
Moisture idx (CMI)
-0,02
Runoff
600mm/an
PET
1 180mm
AET
917mm
Mean slope
6,5°
Water table
229cm
Forest
75%
Crops
24%
Urban
3%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)