HydroBASINS lev08 watershed · #2080574420
Bassin de Sieve
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 : Arezzo, Florence, Prato
Sub-basin area
838,9km²
Upstream area
839km²
Discharge
11,96m³/s
Mean elev.
489m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
3 dept-equivalent regions (GADM L2)
- 838.6 km²99.8% of basin
- 1.7 km²0.2% of basin
- 0.3 km²0.0% of basin
14 intersecting protected areas
Monte Morello
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
14.58 km² overlap
National Park
14.43 km² overlap
Foreste Alto Bacino dell'Arno
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
11.88 km² overlap
Muraglione - Acqua Cheta
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
4.01 km² overlap
La Calvana
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
2.41 km² overlap
Camaldoli, Scodella, Campigna, Badia Prataglia
IUCN Not ReportedSpecial Protection Area (Birds Directive)
2.00 km² overlap
Giogo - Colla di Casaglia
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.98 km² overlap
Bosco ai Frati
IUCN Not ReportedSite of Community Importance (Habitats Directive)
1.71 km² overlap
Crinale Monte Falterona - Monte Falco - Monte Gabrendo
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.67 km² overlap
5 more protected areassorted by overlap area
Other Protected Natural Regional Areas
0.27 km² overlap
Poggio Ripaghera - Santa Brigida
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.22 km² overlap
Foresta di Campigna, Foresta la Lama, Monte Falco
IUCN Not ReportedSpecial Protection Area (Birds Directive)
0.01 km² overlap
Foresta di Campigna, Foresta la Lama, Monte Falco
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.01 km² overlap
Riserva naturale Campigna
IUCN IaState Nature Reserve
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 796 distinct species · 34 252 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 34 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 Sieve : 28 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 83 interactions GloBI sur 6 types (connectance 14.8%, filtre Serrano α=0.2). 6 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°
11,7°C
Annual rain
900mm
Moisture idx (CMI)
0,04
Runoff
441mm/an
PET
866mm
AET
632mm
Mean slope
12,6°
Water table
399cm
Forest
69%
Crops
11%
Urban
5%
Protected
2%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)