HydroBASINS lev08 watershed · #2080563290
Bassin de Torrente Gesso della Valletta
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 2 administrative regions across 2 countries : Alpes-Maritimes, Cuneo
Sub-basin area
554,3km²
Upstream area
554,3km²
Discharge
14,17m³/s
Mean elev.
1 613m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
2 dept-equivalent regions (GADM L2)
- 544.7 km²98.1% of basin
- 10.7 km²1.9% of basin
6 communes (GADM L5)Available for FRA, RWA
- Tende6.61 km²4% commune
- Saint-Martin-Vésubie1.97 km²2% commune
- Valdeblore1.02 km²1% commune
- Isola0.47 km²0% commune
- La Brigue0.30 km²0% commune
- Belvédère0.29 km²0% commune
14 intersecting protected areas
Alpi Marittime
IUCN Not ReportedSpecial Protection Area (Birds Directive)
319.34 km² overlap
Alpi Marittime
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
319.34 km² overlap
Regional/Provincial Nature Park
262.14 km² overlap
Le Mercantour
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
3.89 km² overlap
Mercantour
IUCN IINational Park - Core Area
3.89 km² overlap
Le Mercantour
IUCN Not ReportedSpecial Protection Area (Birds Directive)
3.70 km² overlap
Other Protected Natural Regional Areas
1.04 km² overlap
National Park - Buffer zone/Area of adhesion
0.94 km² overlap
Regional/Provincial Nature Park
0.39 km² overlap
5 more protected areassorted by overlap area
Alte Valli Pesio e Tanaro
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.36 km² overlap
Alte Valli Pesio e Tanaro
IUCN Not ReportedSpecial Protection Area (Birds Directive)
0.36 km² overlap
Alte Valli Stura e Maira
IUCN Not ReportedSpecial Protection Area (Birds Directive)
0.18 km² overlap
Mont Chajol
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.12 km² overlap
Marguareis - La Brigue - Fontan - Saorge
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.12 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
9 749 distinct species · 220 831 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 26 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 Torrente Gesso della Valletta : 16 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 71 interactions GloBI sur 6 types (connectance 17.5%, filtre Serrano α=0.2). 13 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°
6,3°C
Annual rain
1 055mm
Moisture idx (CMI)
0,36
Runoff
712mm/an
PET
633mm
AET
560mm
Mean slope
25,7°
Water table
808cm
Forest
59%
Crops
8%
Urban
5%
Protected
48%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)