HydroBASINS lev08 watershed · #2080548110
Bassin de la Cronce
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 : Cantal, Haute-Loire
Sub-basin area
158,4km²
Upstream area
158,4km²
Discharge
1,7m³/s
Mean elev.
983m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
2 dept-equivalent regions (GADM L2)
- 111.1 km²70.0% of basin
- 47.7 km²30.0% of basin
20 communes (GADM L5)Available for FRA, RWA
- Chastel27.88 km²100% commune
- Pinols25.45 km²72% commune
- Védrines-Saint-Loup22.83 km²83% commune
- Ferrussac17.39 km²100% commune
- Cronce16.40 km²100% commune
- Soulages11.92 km²80% commune
- Aubazat8.66 km²53% commune
- Arlet5.54 km²100% commune
- Rageade5.49 km²44% commune
- Langeac4.12 km²12% commune
- Clavières3.46 km²8% commune
- Tailhac2.37 km²20% commune
- Chazelles2.17 km²34% commune
- Saint-Cirgues1.44 km²11% commune
- Saint-Austremoine1.14 km²9% commune
- Montchamp1.01 km²6% commune
- Celoux0.82 km²8% commune
- Chilhac0.43 km²10% commune
- Ally0.18 km²1% commune
- Desges0.10 km²1% commune
4 intersecting protected areas
Haut Val d'Allier
IUCN Not ReportedSpecial Protection Area (Birds Directive)
74.83 km² overlap
Sommets du nord Margeride
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
5.56 km² overlap
Val d'Allier / Vieille Brioude / Langeac
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.80 km² overlap
bois de cheneviere
IUCN IVLand acquired by a regional conservatory of natural areas
0.12 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 972 distinct species · 42 684 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 35 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 la Cronce : 28 espèces + 7 bulles famille, 68 interactions GloBI documentées sur 5 types (connectance 11.4%, filtre Serrano α=0.2). Les 7 bulles regroupent des espèces visuellement absorbées par famille (≥3 espèces visibles).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydroclimate (BasinATLAS lev08)
Mean T°
8,0°C
Annual rain
764mm
Moisture idx (CMI)
-0,06
Runoff
351mm/an
PET
813mm
AET
621mm
Mean slope
9,7°
Water table
476cm
Forest
77%
Crops
4%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)