HydroBASINS lev08 watershed · #2080539020
Bassin de Torrente Lys
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 : Aosta, Biella, Torino, Vercelli
Sub-basin area
274,9km²
Upstream area
274,9km²
Discharge
8,19m³/s
Mean elev.
2 035m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
4 dept-equivalent regions (GADM L2)
- Aosta274.4 km²99.6% of basin
- 0.5 km²0.2% of basin
- 0.3 km²0.1% of basin
- 0.3 km²0.1% of basin
11 intersecting protected areas
Ambienti glaciali del Gruppo del Monte Rosa
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
30.28 km² overlap
Ambienti glaciali del Gruppo del Monte Rosa
IUCN Not ReportedSpecial Protection Area (Birds Directive)
30.28 km² overlap
Riserva naturale Mont Mars
IUCN IVRegional/Provincial Nature Reserve
3.57 km² overlap
Mont Mars
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
3.40 km² overlap
Alta Valsesia e Valli Otro, Vogna, Gronda, Artogna e Sorba
IUCN Not ReportedSpecial Protection Area (Birds Directive)
1.37 km² overlap
Alta Val Sesia
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.61 km² overlap
Stazione di Paeonia officinalis
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.16 km² overlap
Val Sessera
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.06 km² overlap
Stagno di Holay
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.03 km² overlap
2 more protected areassorted by overlap area
Regional/Provincial Nature Reserve
0.01 km² overlap
Parco naturale Alta Valsesia
IUCN IVRegional/Provincial Nature Park
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 889 distinct species · 11 754 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 28 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 Torrente Lys : 19 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 48 interactions GloBI sur 5 types (connectance 11.8%, filtre Serrano α=0.2). 10 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°
2,1°C
Annual rain
1 521mm
Moisture idx (CMI)
0,62
Runoff
940mm/an
PET
514mm
AET
504mm
Mean slope
28,0°
Water table
920cm
Forest
48%
Crops
6%
Urban
1%
Protected
1%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)