HydroBASINS lev08 watershed · #2080520800
Bassin de la Loire
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 3 administrative regions : Allier, Loire, Saône-et-Loire
Sub-basin area
653,4km²
Upstream area
8 598,2km²
Discharge
80,21m³/s
Mean elev.
339m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de la Loire1630 km²
- Bassin du Sornin510 km²
3 dept-equivalent regions (GADM L2)
- 308.4 km²47.1% of basin
- 279.4 km²42.6% of basin
- 67.4 km²10.3% of basin
55 communes (GADM L5)Available for FRA, RWA
- Melay36.23 km²100% commune
- Chenay-le-Châtel32.19 km²100% commune
- Noailly30.68 km²95% commune
- Ambierle30.59 km²100% commune
- Saint-Bonnet-des-Quarts25.99 km²79% commune
- Vivans25.74 km²100% commune
- Céron23.14 km²100% commune
- Saint-Martin-d'Estréaux22.67 km²76% commune
- Montaiguët-en-Forez22.09 km²98% commune
- Iguerande21.77 km²100% commune
- Artaix21.68 km²100% commune
- Sail-les-Bains21.65 km²100% commune
- La Pacaudière21.10 km²100% commune
- Vindecy16.82 km²100% commune
- Saint-Forgeux-Lespinasse16.51 km²100% commune
- Urbise15.47 km²100% commune
- Saint-Haon-le-Vieux15.13 km²91% commune
- Saint-Germain-Lespinasse14.80 km²100% commune
- Saint-Romain-la-Motte14.39 km²52% commune
- Semur-en-Brionnais13.98 km²90% commune
- Saint-Martin-du-Lac13.95 km²100% commune
- Changy13.70 km²100% commune
- L'Hôpital-le-Mercier13.56 km²86% commune
- Chambilly13.34 km²100% commune
- Baugy12.77 km²100% commune
- Bourg-le-Comte11.34 km²96% commune
- Luneau11.18 km²41% commune
- Le Crozet10.85 km²83% commune
- La Bénisson-Dieu10.72 km²96% commune
- Saint-Julien-de-Jonzy10.46 km²47% commune
- Chassenard9.91 km²39% commune
- Avrilly9.15 km²81% commune
- Marcigny8.19 km²100% commune
- Saint-Pierre-la-Noaille7.67 km²97% commune
- Briennon7.19 km²33% commune
- Le Bouchaud6.69 km²29% commune
- Fleury-la-Montagne6.04 km²73% commune
- Mailly5.74 km²100% commune
- Anzy-le-Duc4.93 km²20% commune
- Montceaux-l'Étoile4.04 km²42% commune
- Sainte-Foy3.75 km²46% commune
- Saint-Yan2.82 km²10% commune
- Lenax2.76 km²10% commune
- Saint-Nizier-sous-Charlieu2.47 km²19% commune
- Andelaroche2.14 km²10% commune
- Loddes1.63 km²7% commune
- Saint-Bonnet-de-Cray1.53 km²7% commune
- Saint-Léger-sur-Vouzance1.44 km²8% commune
- Varenne-Saint-Germain1.07 km²7% commune
- Saint-Haon-le-Châtel0.45 km²69% commune
- Saint-Rirand0.40 km²2% commune
- Saint-Pierre-Laval0.34 km²1% commune
- Renaison0.13 km²1% commune
- Pouilly-sous-Charlieu0.10 km²1% commune
- Arfeuilles0.03 km²0% commune
8 intersecting protected areas
Val de Loire bocager
IUCN Not ReportedSpecial Protection Area (Birds Directive)
56.07 km² overlap
Val de Loire bocager
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
49.77 km² overlap
Special Areas of Conservation (Habitats Directive)
10.94 km² overlap
Bois de Lespinasse, de la Benisson-Dieu et de la Pacaudière
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
6.31 km² overlap
Milieux alluviaux et aquatiques de la Loire
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
2.50 km² overlap
Biotope Protection Order
1.67 km² overlap
graviere de marcigny
IUCN IVLand acquired by a regional conservatory of natural areas
0.44 km² overlap
pre feuillant (rompey)
IUCN IVLand acquired by a regional conservatory of natural areas
0.02 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
3 198 distinct species · 160 356 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 31 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 Loire : 27 espèces + 4 bulles famille, 59 interactions GloBI documentées sur 4 types (connectance 12.7%, filtre Serrano α=0.2). Les 4 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°
10,6°C
Annual rain
741mm
Moisture idx (CMI)
-0,15
Runoff
298mm/an
PET
873mm
AET
622mm
Mean slope
3,2°
Water table
197cm
Forest
7%
Crops
11%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)