HydroBASINS lev08 watershed · #2080592540
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 1 administrative regions : Terni
Sub-basin area
16,4km²
Upstream area
3 669,2km²
Discharge
53,74m³/s
Mean elev.
326m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Nera1451 km²
- Bassin de Velino365 km²
3 intersecting protected areas
Bassa Valnerina: Monte Fionchi - Cascata delle Marmore
IUCN Not ReportedSpecial Protection Area (Birds Directive)
1.79 km² overlap
Parco fluviale del Nera
IUCN VRegional/Provincial Nature Park
1.74 km² overlap
Cascata delle Marmore
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.93 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
257 distinct species · 517 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 47 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 : 42 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 83 interactions GloBI sur 5 types (connectance 7.7%, filtre Serrano α=0.2). 5 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
858mm
Moisture idx (CMI)
-0,16
Runoff
409mm/an
PET
1 024mm
AET
679mm
Mean slope
13,0°
Water table
415cm
Forest
62%
Crops
30%
Urban
54%
Protected
10%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)