HydroBASINS lev08 watershed · #2080590850
Bassin de Fiume Paglia
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 5 administrative regions : Grosseto, Perugia, Siena, Terni, Viterbo
Sub-basin area
1 325,1km²
Upstream area
1 325,1km²
Discharge
15,96m³/s
Mean elev.
437m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
5 dept-equivalent regions (GADM L2)
- 573.6 km²43.2% of basin
- 378.5 km²28.5% of basin
- 221.6 km²16.7% of basin
- 92.4 km²7.0% of basin
- 61.4 km²4.6% of basin
25 intersecting protected areas
Sistema territoriale di interesse naturalistico - ambientale Monte Peglia Selva di Meana (STINA)
IUCN VOther Protected Natural Regional Areas
44.24 km² overlap
Regional/Provincial Nature Reserve
29.00 km² overlap
Selva di Meana (Allerona)
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
25.05 km² overlap
Monte Rufeno
IUCN Not ReportedSpecial Protection Area (Birds Directive)
23.37 km² overlap
Monte Rufeno
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
16.76 km² overlap
Bosco dell'Elmo (Monte Peglia)
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
10.46 km² overlap
Monte Cetona
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
9.81 km² overlap
Cono vulcanico del Monte Amiata
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
9.19 km² overlap
Foreste del Siele e del Pigelleto di Piancastagnaio
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
7.95 km² overlap
16 more protected areassorted by overlap area
Monte Penna, Bosco della Fonte e Monte Civitella
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
7.78 km² overlap
Riserva naturale Monte Penna
IUCN IVRegional/Provincial Nature Reserve
6.10 km² overlap
Valle del Fossatello
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
5.21 km² overlap
Riserva naturale Pigelleto
IUCN IVRegional/Provincial Nature Reserve
3.88 km² overlap
Regional/Provincial Nature Reserve
3.15 km² overlap
Boschi dell'alta Valle del Nestore
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.62 km² overlap
Medio corso del Fiume Paglia
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.61 km² overlap
Fosso dell'Acqua Chiara
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.40 km² overlap
Crete dell'Orcia e del Formone
IUCN Not ReportedSpecial Protection Area (Birds Directive)
0.94 km² overlap
Crete dell'Orcia e del Formone
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.94 km² overlap
Valle del Tevere: Laghi di Corbara - Alviano
IUCN Not ReportedSpecial Protection Area (Birds Directive)
0.85 km² overlap
Bagno Minerale (Parrano)
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.78 km² overlap
Other Protected Natural Regional Areas
0.72 km² overlap
Bosco del Sasseto
IUCN Not ReportedSpecial Protection Area (Birds Directive)
0.61 km² overlap
Bosco del Sasseto
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.61 km² overlap
Regional/Provincial Nature Park
0.27 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 793 distinct species · 45 356 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 30 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 Fiume Paglia : 20 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 99 interactions GloBI sur 4 types (connectance 18.8%, filtre Serrano α=0.2). 13 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°
13,1°C
Annual rain
719mm
Moisture idx (CMI)
-0,23
Runoff
364mm/an
PET
939mm
AET
598mm
Mean slope
7,4°
Water table
318cm
Forest
44%
Crops
54%
Urban
2%
Protected
7%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)