HydroBASINS lev08 watershed · #2080511910
Bassin de l'Aron
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 : Nièvre, Saône-et-Loire
Sub-basin area
1 696,7km²
Upstream area
1 696,9km²
Discharge
16,83m³/s
Mean elev.
290m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
2 dept-equivalent regions (GADM L2)
- 1675.9 km²98.5% of basin
- 25.4 km²1.5% of basin
99 communes (GADM L5)Available for FRA, RWA
- Villapourçon49.72 km²98% commune
- Limanton47.40 km²100% commune
- Champvert46.77 km²100% commune
- Cercy-la-Tour45.56 km²100% commune
- Crux-la-Ville42.65 km²93% commune
- Aunay-en-Bazois41.56 km²91% commune
- Luzy41.50 km²99% commune
- Moulins-Engilbert40.99 km²100% commune
- Larochemillay40.34 km²100% commune
- Diennes-Aubigny38.02 km²100% commune
- Millay37.89 km²100% commune
- Rémilly36.20 km²100% commune
- Rouy35.81 km²100% commune
- Montaron33.98 km²100% commune
- Sémelay33.80 km²100% commune
- Vandenesse32.88 km²100% commune
- Saint-Léger-de-Fougeret32.26 km²100% commune
- Montigny-sur-Canne30.93 km²100% commune
- Préporché29.95 km²100% commune
- Bazolles28.23 km²100% commune
- Alluy27.88 km²100% commune
- Ville-Langy27.45 km²100% commune
- Verneuil26.61 km²100% commune
- Fours25.99 km²99% commune
- Chiddes25.81 km²100% commune
- Saint-Saulge25.75 km²100% commune
- Saint-Honoré-les-Bains25.10 km²100% commune
- Fertrève24.67 km²100% commune
- Biches24.63 km²100% commune
- Montapas24.19 km²100% commune
- Tintury23.69 km²100% commune
- Maux23.12 km²100% commune
- Achun22.81 km²93% commune
- Sermages22.54 km²100% commune
- Saint-Hilaire-en-Morvan21.71 km²99% commune
- Anlezy21.42 km²100% commune
- Vitry-Laché20.42 km²89% commune
- Isenay20.36 km²100% commune
- Thaix20.04 km²100% commune
- Saint-Gratien-Savigny19.92 km²100% commune
- Billy-Chevannes19.89 km²82% commune
- Châtillon-en-Bazois19.78 km²100% commune
- Onlay19.73 km²100% commune
- Saxi-Bourdon18.50 km²100% commune
- Blismes18.13 km²67% commune
- Mont-et-Marré17.95 km²100% commune
- Fléty17.82 km²87% commune
- Saint-Péreuse16.46 km²100% commune
- Brinay16.03 km²100% commune
- Cuzy14.91 km²85% commune
- Chougny14.87 km²100% commune
- Frasnay-Reugny13.73 km²100% commune
- Dommartin13.25 km²100% commune
- Thianges13.06 km²99% commune
- Avrée12.98 km²100% commune
- Dun-sur-Grandry12.06 km²100% commune
- Lanty11.91 km²100% commune
- Jailly11.07 km²100% commune
- Charrin10.50 km²40% commune
- Tamnay-en-Bazois10.28 km²100% commune
- Saint-Maurice10.26 km²100% commune
- Savigny-Poil-Fol10.05 km²57% commune
- Château-Chinon (Campagne)9.87 km²34% commune
- Châtin9.07 km²68% commune
- Issy-l'Évêque8.97 km²13% commune
- Beaumont-Sardolles8.92 km²30% commune
- Ougny8.49 km²100% commune
- Poil7.93 km²29% commune
- Saint-Benin-d'Azy7.82 km²22% commune
- Glux-en-Glenne7.68 km²35% commune
- Cizely7.16 km²100% commune
- La Collancelle6.88 km²30% commune
- La Machine6.45 km²36% commune
- Saint-Hilaire-Fontaine6.39 km²27% commune
- Montambert6.29 km²24% commune
- Sainte-Marie6.11 km²39% commune
- Saint-Révérien3.35 km²18% commune
- Decize3.12 km²7% commune
- Saint-Léger-des-Vignes3.07 km²33% commune
- Devay2.97 km²24% commune
- Bona2.69 km²11% commune
- Trois-Vèvres2.32 km²31% commune
- Château-Chinon (Ville)2.27 km²69% commune
- Montreuillon2.16 km²6% commune
- Fâchin1.92 km²14% commune
- Pazy1.16 km²5% commune
- Saint-Franchy0.95 km²5% commune
- Limon0.89 km²11% commune
- Charbonnat0.72 km²3% commune
- Saint-Didier-sur-Arroux0.56 km²2% commune
- Tazilly0.48 km²2% commune
- Epiry0.36 km²3% commune
- Saint-Léger-sous-Beuvray0.22 km²1% commune
- Guipy0.17 km²1% commune
- La Nocle-Maulaix0.10 km²0% commune
- Thil-sur-Arroux0.02 km²0% commune
- Corancy0.02 km²0% commune
- Moussy0.00 km²0% commune
- Saint-Benin-des-Bois0.00 km²0% commune
10 intersecting protected areas
Morvan
IUCN VRegional Nature Park
555.05 km² overlap
Bocage, forêts et milieux humides du Sud Morvan
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
497.99 km² overlap
Special Areas of Conservation (Habitats Directive)
41.39 km² overlap
Special Protection Area (Birds Directive)
41.39 km² overlap
Special Areas of Conservation (Habitats Directive)
12.50 km² overlap
Complexe des étangs du Bazois
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
3.22 km² overlap
Tourbières Du Morvan
IUCN IVRegional Nature Reserve
0.09 km² overlap
Val de Loire nivernais
IUCN Not ReportedSpecial Protection Area (Birds Directive)
0.05 km² overlap
Cavités à chauves-souris en Bourgogne
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.05 km² overlap
1 more protected areassorted by overlap area
Biotope Protection Order
0.05 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
5 237 distinct species · 535 074 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 33 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'Aron : 23 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 94 interactions GloBI sur 6 types (connectance 17.8%, filtre Serrano α=0.2). 10 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°
10,6°C
Annual rain
764mm
Moisture idx (CMI)
-0,08
Runoff
312mm/an
PET
836mm
AET
612mm
Mean slope
3,6°
Water table
219cm
Forest
16%
Crops
8%
Urban
0%
Protected
29%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)