HydroBASINS lev08 watershed · #2080530180
Bassin de Torrente Varrone
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 6 administrative regions across 2 countries : Bellinzona, Bergamo, Como, Lecco, Moësa +1
Sub-basin area
554,4km²
Upstream area
3 919km²
Discharge
138,92m³/s
Mean elev.
1 071m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Adda2615 km²
- Bassin de Mera750 km²
6 dept-equivalent regions (GADM L2)
- 323.7 km²58.2% of basin
- 224.8 km²40.4% of basin
- 5.5 km²1.0% of basin
- 0.7 km²0.1% of basin
- 0.6 km²0.1% of basin
- Bellinzona0.5 km²0.1% of basin
11 intersecting protected areas
Grigne
IUCN Not ReportedSpecial Protection Area (Birds Directive)
22.25 km² overlap
Valle del Dosso
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
16.30 km² overlap
Grigna Settentrionale
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
8.71 km² overlap
Grigna Meridionale
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.84 km² overlap
Parco Regionale Orobie Valtellinesi
IUCN Not ReportedSpecial Protection Area (Birds Directive)
0.74 km² overlap
Parco Regionale Orobie Bergamasche
IUCN Not ReportedSpecial Protection Area (Birds Directive)
0.72 km² overlap
Valle del Bitto di Gerola
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.43 km² overlap
Albionasca
IUCN Not ReportedEmerald Network
0.42 km² overlap
Albionasca
IUCN Not AssignedEmerald Sites
0.42 km² overlap
2 more protected areassorted by overlap area
Val Lesina
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.12 km² overlap
Val Bodengo
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.07 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
5 410 distinct species · 107 632 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Graphe en cours d’indexation
Calcul du tissu écologique de cette entité.
Le graphe apparaîtra automatiquement dès que le calcul est terminé (rafraîchissement toutes les 2s).
Hydroclimate (BasinATLAS lev08)
Mean T°
7,7°C
Annual rain
1 217mm
Moisture idx (CMI)
0,41
Runoff
1 026mm/an
PET
708mm
AET
687mm
Mean slope
23,6°
Water table
786cm
Forest
84%
Crops
3%
Urban
3%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)