HydroBASINS lev08 watershed · #2080594380
Bassin de Tevere
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 : Perugia, Terni, Viterbo
Sub-basin area
970,2km²
Upstream area
8 000km²
Discharge
108,46m³/s
Mean elev.
315m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Tevere1595 km²
- Bassin de Fiume Paglia1325 km²
3 dept-equivalent regions (GADM L2)
- 567.5 km²58.4% of basin
- 402.2 km²41.4% of basin
- 2.1 km²0.2% of basin
15 intersecting protected areas
Monti Amerini
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
78.37 km² overlap
Calanchi di Civita di Bagnoregio
IUCN Not ReportedSpecial Protection Area (Birds Directive)
15.92 km² overlap
Calanchi di Civita di Bagnoregio
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
15.92 km² overlap
Regional/Provincial Nature Park
14.34 km² overlap
Valle del Tevere: Laghi di Corbara - Alviano
IUCN Not ReportedSpecial Protection Area (Birds Directive)
12.62 km² overlap
Monte Cimino (versante nord)
IUCN Not ReportedSpecial Protection Area (Birds Directive)
9.74 km² overlap
Monte Cimino (versante nord)
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
9.74 km² overlap
Zona umida di Alviano
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
7.39 km² overlap
Boschi di Farneta (Monte Castrilli)
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
7.18 km² overlap
6 more protected areassorted by overlap area
Regional/Provincial Nature Reserve
2.70 km² overlap
Regional/Provincial Nature Reserve
1.26 km² overlap
Travertini di Bassano in Teverina
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.01 km² overlap
Monumento naturale Corviano
IUCN IIIOther Protected Natural Regional Areas
0.73 km² overlap
Ancient and Primeval Beech Forests of the Carpathians and Other Regions of Europe
IUCN Not ApplicableWorld Heritage Site (natural or mixed)
0.58 km² overlap
Valle Pasquarella (Baschi)
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.03 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 773 distinct species · 17 481 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 43 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 Tevere : 37 espèces dont 3 patrimoniales (LR IUCN CR/EN/VU) reliées par 105 interactions GloBI sur 5 types (connectance 11.6%, 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°
14,0°C
Annual rain
790mm
Moisture idx (CMI)
-0,22
Runoff
363mm/an
PET
1 010mm
AET
640mm
Mean slope
6,5°
Water table
325cm
Forest
33%
Crops
49%
Urban
3%
Protected
2%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)