HydroBASINS lev08 watershed · #2080589450
Bassin de Torrente Lanzo
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 : Grosseto, Siena
Sub-basin area
493,9km²
Upstream area
3 083,6km²
Discharge
32,26m³/s
Mean elev.
202m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Fiume Orcia880 km²
- Bassin de Fiume Ombrone80 km²
2 dept-equivalent regions (GADM L2)
- 494.2 km²99.9% of basin
- 0.5 km²0.1% of basin
7 intersecting protected areas
Val di Farma
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
15.87 km² overlap
Riserva naturale Farma
IUCN IVRegional/Provincial Nature Reserve
7.12 km² overlap
Monte Leoni
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
6.38 km² overlap
Monte Labbro e alta valle dell'Albegna
IUCN Not ReportedSpecial Protection Area (Birds Directive)
1.44 km² overlap
Monte Labbro e alta valle dell'Albegna
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.44 km² overlap
Regional/Provincial Nature Reserve
0.99 km² overlap
Riserva naturale Belagaio
IUCN IVState Nature Reserve
0.33 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 869 distinct species · 11 931 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 48 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 Lanzo : 33 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 111 interactions GloBI sur 7 types (connectance 9.4%, filtre Serrano α=0.2). 16 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
669mm
Moisture idx (CMI)
-0,32
Runoff
279mm/an
PET
990mm
AET
565mm
Mean slope
6,8°
Water table
306cm
Forest
35%
Crops
23%
Urban
0%
Protected
2%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)