HydroBASINS lev08 watershed · #2080573580
Bassin de l'Estéron
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 : Alpes-Maritimes, Alpes-de-Haute-Provence
Sub-basin area
450,1km²
Upstream area
450,1km²
Discharge
9,38m³/s
Mean elev.
920m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
2 dept-equivalent regions (GADM L2)
- 395.3 km²87.6% of basin
- 55.8 km²12.4% of basin
38 communes (GADM L5)Available for FRA, RWA
- Saint-Auban40.39 km²96% commune
- Le Mas31.23 km²98% commune
- Soleilhas29.53 km²85% commune
- Briançonnet24.74 km²99% commune
- Roquestéron-Grasse24.55 km²100% commune
- Cuébris22.90 km²100% commune
- Pierrefeu21.06 km²92% commune
- La Rochette18.14 km²98% commune
- Gars15.38 km²100% commune
- Toudon15.19 km²86% commune
- Aiglun15.06 km²100% commune
- Les Mujouls14.72 km²100% commune
- Bézaudun-les-Alpes14.63 km²69% commune
- La Penne14.41 km²78% commune
- Les Ferres14.12 km²100% commune
- Conségudes12.48 km²100% commune
- Bouyon11.89 km²99% commune
- Ascros11.74 km²68% commune
- Collongues10.69 km²100% commune
- Sallagriffon9.81 km²100% commune
- Tourette-du-Château9.20 km²96% commune
- Coursegoules8.94 km²22% commune
- Gilette8.93 km²81% commune
- Amirat8.45 km²63% commune
- Le Broc6.78 km²36% commune
- Gréolières6.26 km²12% commune
- Roquesteron6.17 km²100% commune
- Saint-Antonin5.98 km²100% commune
- Sigale5.54 km²100% commune
- Saint-Pierre5.46 km²100% commune
- Revest-les-Roches2.74 km²32% commune
- Ubraye1.64 km²5% commune
- Bonson0.70 km²11% commune
- Val-de-Chalvagne0.60 km²2% commune
- Valderoure0.41 km²2% commune
- Peyroules0.29 km²1% commune
- Andon0.16 km²0% commune
- Entrevaux0.10 km²0% commune
7 intersecting protected areas
Préalpes D’Azur
IUCN VRegional Nature Park
382.60 km² overlap
Verdon
IUCN VRegional Nature Park
29.76 km² overlap
Préalpes de Grasse
IUCN Not ReportedSpecial Protection Area (Birds Directive)
8.28 km² overlap
Cheiron (Du)
IUCN IaForest Integral Biological Reserve
6.56 km² overlap
Préalpes de Grasse
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
3.42 km² overlap
Gorges de la Vésubie et du Var - mont Vial - mont Férion
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
3.13 km² overlap
Cheiron (Du)
IUCN IVForest Managed Biological Reserve
2.15 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
4 210 distinct species · 145 935 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 24 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 l'Estéron : 14 espèces reliées par 114 interactions GloBI sur 5 types (connectance 35.1%, filtre Serrano α=0.2). 12 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°
10,1°C
Annual rain
869mm
Moisture idx (CMI)
0,07
Runoff
607mm/an
PET
801mm
AET
617mm
Mean slope
18,9°
Water table
698cm
Forest
88%
Crops
3%
Urban
0%
Protected
83%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)