HydroBASINS lev08 watershed · #2080551000
Bassin de Torrente Scrivia
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 3 administrative regions : Alessandria, Genova, Piacenza
Sub-basin area
827,9km²
Upstream area
828km²
Discharge
20,54m³/s
Mean elev.
563m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
3 dept-equivalent regions (GADM L2)
- 540.8 km²65.2% of basin
- 288.9 km²34.8% of basin
- Piacenza0.0 km²0.0% of basin
15 intersecting protected areas
Massiccio dell'Antola - Monte Carmo - Monte Legnà
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
59.29 km² overlap
Regional/Provincial Nature Park
30.49 km² overlap
Conglomerato di Vobbia
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
29.79 km² overlap
Greto dello Scrivia
IUCN Not ReportedSpecial Protection Area (Birds Directive)
21.95 km² overlap
Greto dello Scrivia
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
21.95 km² overlap
Strette della Val Borbera
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
16.59 km² overlap
Basso Scrivia
IUCN Not ReportedSite of Community Importance (Habitats Directive)
9.21 km² overlap
Parco dell'Antola
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
7.93 km² overlap
Dorsale Monte Ebro - Monte Chiappo
IUCN Not ReportedSpecial Protection Area (Birds Directive)
3.13 km² overlap
6 more protected areassorted by overlap area
Rio Pentemina
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
2.94 km² overlap
Val Noci - Torrente Geirato - Alpesisa
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
2.36 km² overlap
Calanchi di Rigoroso, Sottovalle e Carrosio
IUCN Not ReportedSite of Community Importance (Habitats Directive)
2.08 km² overlap
Fiume Po - tratto vercellese alessandrino
IUCN Not ReportedSpecial Protection Area (Birds Directive)
1.75 km² overlap
Rio di Vallenzona
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.18 km² overlap
Val Boreca, Monte Lesima
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.09 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
3 648 distinct species · 42 358 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 33 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 Scrivia : 26 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 83 interactions GloBI sur 2 types (connectance 14.8%, filtre Serrano α=0.2). 8 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°
10,3°C
Annual rain
1 054mm
Moisture idx (CMI)
0,24
Runoff
782mm/an
PET
795mm
AET
652mm
Mean slope
14,1°
Water table
476cm
Forest
71%
Crops
15%
Urban
8%
Protected
4%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)