HydroBASINS lev08 watershed · #2080575280
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 6 administrative regions : Arezzo, Bologna, Florence, Pistoia, Prato +1
Sub-basin area
1 889,8km²
Upstream area
6 282,2km²
Discharge
88,26m³/s
Mean elev.
263m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Torrente Ambra999 km²
- Bassin de Sieve839 km²
6 dept-equivalent regions (GADM L2)
- 1166.3 km²61.6% of basin
- 326.1 km²17.2% of basin
- 322.6 km²17.0% of basin
- 77.8 km²4.1% of basin
- Bologna0.4 km²0.0% of basin
- 0.2 km²0.0% of basin
18 intersecting protected areas
La Calvana
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
43.02 km² overlap
Monte Morello
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
27.16 km² overlap
Appennino pratese
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
26.55 km² overlap
Monti del Chianti
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
22.93 km² overlap
Stagni della Piana Fiorentina e Pratese
IUCN Not ReportedSpecial Protection Area (Birds Directive)
19.02 km² overlap
Stagni della Piana Fiorentina e Pratese
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
19.02 km² overlap
Monte Ferrato e Monte Iavello
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
13.76 km² overlap
Regional/Provincial Nature Reserve
13.75 km² overlap
Tre Limentre - Reno
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
8.43 km² overlap
9 more protected areassorted by overlap area
Poggio Ripaghera - Santa Brigida
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
3.96 km² overlap
Other Protected Natural Regional Areas
3.51 km² overlap
Other Protected Natural Regional Areas
3.00 km² overlap
Other Protected Natural Regional Areas
0.68 km² overlap
Other Protected Natural Regional Areas
0.58 km² overlap
Laghi di Suviana e Brasimone
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.53 km² overlap
Regional/Provincial Nature Park
0.48 km² overlap
Other Protected Natural Regional Areas
0.43 km² overlap
Alta valle del Torrente Pescia di Pescia
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.04 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
5 653 distinct species · 209 812 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 40 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 : 26 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 108 interactions GloBI sur 5 types (connectance 13.2%, filtre Serrano α=0.2). 15 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°
13,3°C
Annual rain
874mm
Moisture idx (CMI)
-0,08
Runoff
448mm/an
PET
958mm
AET
654mm
Mean slope
8,8°
Water table
320cm
Forest
29%
Crops
22%
Urban
26%
Protected
1%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)