HydroBASINS lev08 watershed · #2080016020
Bassin de Arno
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 4 administrative regions : Florence, Lucca, Pisa, Pistoia
Sub-basin area
633,9km²
Upstream area
9 150,2km²
Discharge
134,43m³/s
Mean elev.
89m
Administrative coverage
Hydrographic chain
▼ Drains into
Outlet (drains to ocean / endorheic)
▲ Receives from 2 basins
- Bassin de Egola766 km²
- Bassin de Fiume Era594 km²
4 dept-equivalent regions (GADM L2)
- 390.5 km²61.5% of basin
- 231.6 km²36.5% of basin
- 12.7 km²2.0% of basin
- 0.3 km²0.0% of basin
16 intersecting protected areas
Monte Pisano
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
77.22 km² overlap
Regional/Provincial Nature Park
44.84 km² overlap
Cerbaie
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
44.65 km² overlap
Selva Pisana
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
34.81 km² overlap
Selva Pisana
IUCN Not ReportedSpecial Protection Area (Birds Directive)
34.81 km² overlap
Massaciuccoli lake and marsh
IUCN IVWetland of International Importance (Ramsar Site)
20.20 km² overlap
Ex alveo del Lago di Bientina
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
10.56 km² overlap
Montefalcone
IUCN Not ReportedSpecial Protection Area (Birds Directive)
4.31 km² overlap
Padule di Verciano, Prati alle Fontane e Padule delle Monache
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
3.97 km² overlap
7 more protected areassorted by overlap area
Regional/Provincial Nature Reserve
3.75 km² overlap
State Nature Reserve
3.27 km² overlap
Other Protected Natural Regional Areas
1.64 km² overlap
State Nature Reserve
1.02 km² overlap
Bonifica della Gherardesca
IUCN Not ReportedSpecial Protection Area (Birds Directive)
0.57 km² overlap
Other Protected Natural Regional Areas
0.17 km² overlap
International significance Natural Marine Area
0.03 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
4 184 distinct species · 76 055 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 46 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 Arno : 37 espèces dont 3 patrimoniales (LR IUCN CR/EN/VU) reliées par 110 interactions GloBI sur 5 types (connectance 10.6%, 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°
14,2°C
Annual rain
880mm
Moisture idx (CMI)
-0,10
Runoff
503mm/an
PET
986mm
AET
665mm
Mean slope
4,8°
Water table
154cm
Forest
21%
Crops
32%
Urban
30%
Protected
9%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)