HydroBASINS lev08 watershed · #2080550920
Bassin de Roggia Laciazzolo
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 2 administrative regions : Alessandria, Pavia
Sub-basin area
303,1km²
Upstream area
25 937,3km²
Discharge
587,15m³/s
Mean elev.
93m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Fiume Po379 km²
- Bassin de Tanaro214 km²
2 dept-equivalent regions (GADM L2)
- 216.2 km²71.2% of basin
- 87.6 km²28.8% of basin
18 intersecting protected areas
Risaie della Lomellina
IUCN Not ReportedSpecial Protection Area (Birds Directive)
164.47 km² overlap
Fiume Po - tratto vercellese alessandrino
IUCN Not ReportedSpecial Protection Area (Birds Directive)
14.29 km² overlap
Confluenza Po - Sesia - Tanaro
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
7.98 km² overlap
Other Protected Natural Regional Areas
2.66 km² overlap
Garzaia di S. Alessandro
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
2.66 km² overlap
Other Protected Natural Regional Areas
1.62 km² overlap
Garzaia della Verminesca
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.62 km² overlap
Other Protected Natural Regional Areas
1.41 km² overlap
Garzaia di Celpenchio
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.41 km² overlap
9 more protected areassorted by overlap area
Other Protected Natural Regional Areas
0.73 km² overlap
Garzaia della Cascina Notizia
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.73 km² overlap
Abbazia Acqualunga
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.69 km² overlap
Regional/Provincial Nature Reserve
0.69 km² overlap
Regional/Provincial Nature Reserve
0.68 km² overlap
Greto dello Scrivia
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.48 km² overlap
Greto dello Scrivia
IUCN Not ReportedSpecial Protection Area (Birds Directive)
0.48 km² overlap
Riserva naturale Palude Loja
IUCN IVRegional/Provincial Nature Reserve
0.40 km² overlap
Palude Loja
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.40 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 401 distinct species · 15 980 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 37 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 Roggia Laciazzolo : 31 espèces dont 3 patrimoniales (LR IUCN CR/EN/VU) reliées par 93 interactions GloBI sur 2 types (connectance 12.6%, 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°
12,7°C
Annual rain
964mm
Moisture idx (CMI)
0,03
Runoff
724mm/an
PET
936mm
AET
707mm
Mean slope
0,1°
Water table
5cm
Forest
0%
Crops
91%
Urban
4%
Protected
3%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)