HydroBASINS lev08 watershed · #7080638110
Bassin de 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 11 administrative regions : Grainger, Greene, Hamblen, Hancock, Hawkins +6
Sub-basin area
2 577,4km²
Upstream area
9 759,8km²
Discharge
196,89m³/s
Mean elev.
390m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
11 dept-equivalent regions (GADM L2)
- 1076.7 km²41.8% of basin
- 567.0 km²22.0% of basin
- Knox307.8 km²11.9% of basin
- Jefferson283.3 km²11.0% of basin
- 274.3 km²10.6% of basin
- Union55.1 km²2.1% of basin
- Sullivan6.3 km²0.2% of basin
- Sevier3.9 km²0.2% of basin
3 moreFull L2 list
- Greene1.8 km² · 0.1%
- Hancock1.5 km² · 0.1%
- Washington0.2 km² · 0.0%
7 intersecting protected areas
State Natural Area
3.44 km² overlap
State Natural Area
2.13 km² overlap
Phipps Bend
IUCN VWildlife Refuge
1.63 km² overlap
Buffalo Springs
IUCN VWildlife Management Area
1.35 km² overlap
Reserve Program
0.24 km² overlap
Reserve Program
0.04 km² overlap
Local Conservation Area
0.02 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
3 402 distinct species · 419 050 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 Holston River : 28 espèces reliées par 83 interactions GloBI sur 4 types (connectance 11.2%, filtre Serrano α=0.2). 11 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°
13,2°C
Annual rain
1 196mm
Moisture idx (CMI)
-0,03
Runoff
653mm/an
PET
1 231mm
AET
926mm
Mean slope
6,1°
Water table
313cm
Forest
45%
Crops
30%
Urban
5%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)