HydroBASINS lev08 watershed · #2080512390
Bassin de Drau
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 4 administrative regions across 2 countries : Belluno, Bolzano, Hermagor, Lienz
Sub-basin area
667,4km²
Upstream area
667,5km²
Discharge
11,25m³/s
Mean elev.
1 842m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
4 dept-equivalent regions (GADM L2)
- 506.5 km²75.7% of basin
- Bolzano160.4 km²24.0% of basin
- 2.2 km²0.3% of basin
- 0.1 km²0.0% of basin
10 intersecting protected areas
Parco Naturale Tre Cime
IUCN Not ReportedSpecial Protection Area (Birds Directive)
77.38 km² overlap
Parco Naturale Tre Cime
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
77.38 km² overlap
Regional/Provincial Nature Park
77.13 km² overlap
The Dolomites
IUCN Not ApplicableWorld Heritage Site (natural or mixed)
57.62 km² overlap
Landscape Protection Area
3.99 km² overlap
Biotopo Monte Covolo - Alpe di Nemes
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
2.13 km² overlap
Biotopo Monte Covolo - Nemes
IUCN IVRegional/Provincial Nature Reserve
2.13 km² overlap
Dolomiti del Cadore e del Comelico
IUCN Not ReportedSpecial Protection Area (Birds Directive)
1.75 km² overlap
Gruppo del Popera - Dolomiti di Auronzo e di Val Comelico
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.51 km² overlap
1 more protected areassorted by overlap area
Val Visdende - Monte Peralba - Quaterna'
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.14 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
4 901 distinct species · 39 703 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 42 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 Drau : 22 espèces reliées par 152 interactions GloBI sur 5 types (connectance 16.1%, filtre Serrano α=0.2). 22 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°
2,1°C
Annual rain
1 088mm
Moisture idx (CMI)
0,43
Runoff
634mm/an
PET
594mm
AET
574mm
Mean slope
25,0°
Water table
918cm
Forest
68%
Crops
10%
Urban
0%
Protected
12%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)