HydroBASINS lev08 watershed · #2080553670
Bassin de Ruisseau des Ternes
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 1 administrative regions : Cantal
Sub-basin area
103,4km²
Upstream area
1 342,8km²
Discharge
18,37m³/s
Mean elev.
960m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de la Truyère472 km²
- Bassin de l'Ander323 km²
1 dept-equivalent regions (GADM L2)
- 103.6 km²100.0% of basin
11 communes (GADM L5)Available for FRA, RWA
- Alleuze19.02 km²76% commune
- Les Ternes18.50 km²98% commune
- Faverolles12.47 km²36% commune
- Sériers12.39 km²100% commune
- Cussac8.66 km²64% commune
- Lavastrie7.92 km²32% commune
- Neuvéglise7.36 km²14% commune
- Villedieu7.08 km²36% commune
- Paulhac6.97 km²15% commune
- Tanavelle3.04 km²23% commune
- Fridefont0.23 km²1% commune
8 intersecting protected areas
Planèze de Saint Flour
IUCN Not ReportedSpecial Protection Area (Birds Directive)
52.25 km² overlap
Gorges de la Truyère
IUCN Not ReportedSpecial Protection Area (Birds Directive)
33.01 km² overlap
Volcans D\'Auvergne
IUCN VRegional Nature Park
15.87 km² overlap
Zones humides de la Planèze de Saint-Flour
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
9.80 km² overlap
Affluents rive droite de la Truyère amont
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
2.97 km² overlap
Narse De Lascols
IUCN IVBiotope Protection Order
1.01 km² overlap
Aubrac
IUCN VRegional Nature Park
0.14 km² overlap
Lac de grandval
IUCN IVLand acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)
0.03 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 603 distinct species · 140 668 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 29 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 Ruisseau des Ternes : 19 espèces reliées par 120 interactions GloBI sur 6 types (connectance 24.2%, filtre Serrano α=0.2). 13 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°
8,3°C
Annual rain
791mm
Moisture idx (CMI)
-0,05
Runoff
506mm/an
PET
833mm
AET
645mm
Mean slope
5,3°
Water table
347cm
Forest
34%
Crops
4%
Urban
0%
Protected
15%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)