HydroBASINS lev08 watershed · #2080527060
Bassin de Mera
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 7 administrative regions across 2 countries : Albula, Como, Hinterrhein, Lecco, Maloja +2
Sub-basin area
749,9km²
Upstream area
750,1km²
Discharge
27,06m³/s
Mean elev.
1 703m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
7 dept-equivalent regions (GADM L2)
- 537.1 km²71.4% of basin
- 177.0 km²23.5% of basin
- 31.8 km²4.2% of basin
- 3.3 km²0.4% of basin
- Hinterrhein1.5 km²0.2% of basin
- 0.9 km²0.1% of basin
- 0.1 km²0.0% of basin
30 intersecting protected areas
Val Bodengo
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
25.29 km² overlap
Piano di Chiavenna
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
25.16 km² overlap
Val Zerta
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
15.82 km² overlap
Pian di Spagna e Lago di Mezzola
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
13.81 km² overlap
Wetland of International Importance (Ramsar Site)
13.11 km² overlap
Valle dei Ratti - Cime di Gaiazzo
IUCN Not ReportedSpecial Protection Area (Birds Directive)
12.77 km² overlap
Lago di Mezzola e Pian di Spagna
IUCN Not ReportedSpecial Protection Area (Birds Directive)
12.75 km² overlap
Regional/Provincial Nature Reserve
12.61 km² overlap
Valle dei Ratti
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
8.55 km² overlap
21 more protected areassorted by overlap area
Val Codera
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
8.18 km² overlap
Val Codera
IUCN Not ReportedSpecial Protection Area (Birds Directive)
8.18 km² overlap
Ganda Rossa
IUCN Not AssignedForest Reserves
3.80 km² overlap
Special Protection Area (Birds Directive)
2.23 km² overlap
Vadrec del Forno
IUCN IVFederal Inventory of Alluvial Zones of National Importance
2.11 km² overlap
Bagni di Masino - Pizzo Badile
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.93 km² overlap
Vadrec da la Bondasca
IUCN IVFederal Inventory of Alluvial Zones of National Importance
1.92 km² overlap
Ciresc
IUCN Not AssignedForest Reserves
0.99 km² overlap
Plazza
IUCN Not AssignedForest Reserves
0.82 km² overlap
Borgonovo-Stampa-Campac
IUCN IVFederal Inventory of Alluvial Zones of National Importance
0.46 km² overlap
Regional/Provincial Nature Reserve
0.41 km² overlap
Lera d`Zura
IUCN Not AssignedForest Reserves
0.37 km² overlap
Cavloc
IUCN IVFederal Inventory of Amphibian Spawning Areas of National Importance
0.37 km² overlap
Maloja Gletschermühlen
IUCN Not AssignedPrivate Nature Reserves
0.35 km² overlap
Maloja
IUCN Not AssignedForest Reserves
0.35 km² overlap
Brentan
IUCN IVFederal Inventory of Dry Grasslands and Pastures of National Importance
0.20 km² overlap
Cant
IUCN IVFederal Inventory of Dry Grasslands and Pastures of National Importance
0.15 km² overlap
Val di Mello - Piano di Preda Rossa
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.13 km² overlap
Other Protected Natural Regional Areas
0.12 km² overlap
Nalghen
IUCN IVFederal Inventory of Dry Grasslands and Pastures of National Importance
0.11 km² overlap
L'Äla
IUCN IVFederal Inventory of Dry Grasslands and Pastures of National Importance
0.11 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
6 365 distinct species · 172 055 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 Mera : 16 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 125 interactions GloBI sur 5 types (connectance 22.3%, filtre Serrano α=0.2). 18 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°
3,8°C
Annual rain
1 314mm
Moisture idx (CMI)
0,55
Runoff
1 126mm/an
PET
560mm
AET
549mm
Mean slope
27,7°
Water table
891cm
Forest
59%
Crops
4%
Urban
2%
Protected
2%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)