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

97% lakePfafstetter: 21406407

Sub-basin area

554,4km²

Upstream area

3 919km²

Discharge

138,92m³/s

Mean elev.

1 071m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Naviglio di Paderno393 km²

▲ Receives from 2 basins

Bassin de Adda2615 km²
Bassin de Mera750 km²

6 dept-equivalent regions (GADM L2)

Lecco
Lombardia · Italy
323.7 km²
58.2% of basin
Como
Lombardia · Italy
224.8 km²
40.4% of basin
Moësa
Graubünden · Switzerland
5.5 km²
1.0% of basin
Bergamo
Lombardia · Italy
0.7 km²
0.1% of basin
Sondrio
Lombardia · Italy
0.6 km²
0.1% of basin
Bellinzona
Ticino · Switzerland
0.5 km²
0.1% of basin

11 intersecting protected areas

Grigne
IUCN Not Reported
Special Protection Area (Birds Directive)
22.25 km² overlap
Valle del Dosso
IUCN Not Reported
Special Areas of Conservation (Habitats Directive)
16.30 km² overlap
Grigna Settentrionale
IUCN Not Reported
Special Areas of Conservation (Habitats Directive)
8.71 km² overlap
Grigna Meridionale
IUCN Not Reported
Special Areas of Conservation (Habitats Directive)
0.84 km² overlap
Parco Regionale Orobie Valtellinesi
IUCN Not Reported
Special Protection Area (Birds Directive)
0.74 km² overlap
Parco Regionale Orobie Bergamasche
IUCN Not Reported
Special Protection Area (Birds Directive)
0.72 km² overlap
Valle del Bitto di Gerola
IUCN Not Reported
Special Areas of Conservation (Habitats Directive)
0.43 km² overlap
Albionasca
IUCN Not Reported
Emerald Network
0.42 km² overlap
Albionasca
IUCN Not Assigned
Emerald Sites
0.42 km² overlap

2 more protected areassorted by overlap area

Val Lesina
IUCN Not Reported
Special Areas of Conservation (Habitats Directive)
0.12 km² overlap
Val Bodengo
IUCN Not Reported
Special 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

Sample of 32 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).

RègnesAnimalPlanteChampignonBacterie

RelationsPredationParasitismeSymbiosePollinisation

StatutEn dangerVulnérableProtégéeEndémique

RègnesAnimalPlanteChampignonBacterie

RelationsPredationParasitismeSymbiosePollinisation

StatutEn dangerVulnérableProtégéeEndémique

Indicateurs du tissu écologique

Tissu écologique de Bassin de Torrente Varrone : 26 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 95 interactions GloBI sur 6 types (connectance 16.9%, filtre Serrano α=0.2). 8 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées

Interactions affichées

Connectance

0.169

Patrimoniales

Plus dense que (national)0 %(top 100%)

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 217mm

Moisture idx (CMI)

0,41

Runoff

1 026mm/an

PET

708mm

AET

687mm

Mean slope

23,6°

Water table

786cm

Forest

84%

Crops

Urban

Protected

HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)