HydroBASINS lev08 watershed · #2080594390
Bassin de Nera
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 : Rieti, Terni, Viterbo
Sub-basin area
390,2km²
Upstream area
4 163km²
Discharge
59,64m³/s
Mean elev.
324m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 3 basins
- Bassin de Fosso di Carticina104 km²
- Bassin · #208010301041 km²
- Bassin de Nera16 km²
3 dept-equivalent regions (GADM L2)
- 368.6 km²94.3% of basin
- 20.6 km²5.3% of basin
- 1.7 km²0.4% of basin
9 intersecting protected areas
Monte Torre Maggiore (Monti Martani)
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
10.80 km² overlap
Lago di San Liberato
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
4.19 km² overlap
Piani di Ruschio (Stroncone)
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
4.10 km² overlap
Lago dell'Aia (Narni)
IUCN Not ReportedSpecial Protection Area (Birds Directive)
2.35 km² overlap
Gole di Narni - Stifone
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
2.27 km² overlap
Lago l'Aia (Narni)
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.21 km² overlap
Monti San Pancrazio - Oriolo
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.72 km² overlap
Boschi di Farneta (Monte Castrilli)
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.51 km² overlap
Valle del Serra (Monti Martani)
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.20 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
882 distinct species · 3 082 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 45 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 Nera : 36 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 108 interactions GloBI sur 5 types (connectance 10.4%, filtre Serrano α=0.2). 10 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°
13,7°C
Annual rain
843mm
Moisture idx (CMI)
-0,17
Runoff
396mm/an
PET
1 017mm
AET
667mm
Mean slope
8,8°
Water table
308cm
Forest
36%
Crops
56%
Urban
17%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)