HydroBASINS lev08 watershed · #2080547440
Bassin de Torrente Orco
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 across 2 countries : Aosta, Asti, Savoie, Torino, Vercelli
Sub-basin area
2 580,6km²
Upstream area
9 253,9km²
Discharge
187,67m³/s
Mean elev.
1 082m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Po2357 km²
- Bassin de Dora Riparia1348 km²
5 dept-equivalent regions (GADM L2)
- 2552.2 km²98.7% of basin
- 18.3 km²0.7% of basin
- 11.0 km²0.4% of basin
- Aosta4.9 km²0.2% of basin
- 0.1 km²0.0% of basin
3 communes (GADM L5)Available for FRA, RWA
- Bonneval-sur-Arc5.41 km²5% commune
- Bessans3.19 km²2% commune
- Val-d'Isère2.42 km²2% commune
30 intersecting protected areas
National Park
339.52 km² overlap
Parco Nazionale del Gran Paradiso
IUCN Not ReportedSpecial Protection Area (Birds Directive)
339.18 km² overlap
Parco Nazionale del Gran Paradiso
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
339.18 km² overlap
Regional/Provincial Nature Park
66.40 km² overlap
Pian della Mussa (Balme)
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
34.86 km² overlap
La Mandria
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
33.67 km² overlap
Regional/Provincial Nature Reserve
26.60 km² overlap
Vauda
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
26.56 km² overlap
Bosco del Vaj e "Bosc Grand"
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
13.48 km² overlap
21 more protected areassorted by overlap area
Baraccone (confluenza Po - Dora Baltea)
IUCN Not ReportedSpecial Protection Area (Birds Directive)
9.74 km² overlap
Baraccone (confluenza Po - Dora Baltea)
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
9.74 km² overlap
Scarmagno - Torre Canavese (morena destra d'Ivrea)
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
8.80 km² overlap
Stura di Lanzo
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
6.89 km² overlap
Monte Musiné e Laghi di Caselette
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
6.70 km² overlap
Confluenza Po - Orco - Malone
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
3.12 km² overlap
Confluenza Po - Orco - Malone
IUCN Not ReportedSpecial Protection Area (Birds Directive)
3.12 km² overlap
Regional/Provincial Nature Park
2.45 km² overlap
Meisino (confluenza Po - Stura)
IUCN Not ReportedSpecial Protection Area (Birds Directive)
2.37 km² overlap
Regional/Provincial Nature Reserve
2.27 km² overlap
Collina di Superga
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
2.26 km² overlap
La Vanoise
IUCN Not ReportedSpecial Protection Area (Birds Directive)
1.99 km² overlap
Vanoise
IUCN IINational Park - Core Area
1.88 km² overlap
Regional/Provincial Nature Park
1.77 km² overlap
Mont Avic e Mont Emilius
IUCN Not ReportedSpecial Protection Area (Birds Directive)
1.48 km² overlap
Réseau de vallons d'altitude à Caricion
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.47 km² overlap
Other Protected Natural Regional Areas
1.17 km² overlap
Regional/Provincial Nature Reserve
1.04 km² overlap
Monti Pelati e Torre Cives
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.96 km² overlap
Massif de la Vanoise
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.92 km² overlap
Parco naturale del Mont Avic
IUCN IVRegional/Provincial Nature Park
0.84 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
5 068 distinct species · 93 551 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 Torrente Orco : 30 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 84 interactions GloBI sur 4 types (connectance 11.3%, filtre Serrano α=0.2). 9 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°
7,7°C
Annual rain
1 085mm
Moisture idx (CMI)
0,22
Runoff
718mm/an
PET
749mm
AET
634mm
Mean slope
15,7°
Water table
554cm
Forest
42%
Crops
18%
Urban
14%
Protected
17%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)