HydroBASINS lev08 watershed · #2080502720
Bassin de l'Arnon
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 4 administrative regions : Allier, Cher, Creuse, Indre
Sub-basin area
2 206,4km²
Upstream area
2 206,6km²
Discharge
16,43m³/s
Mean elev.
196m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
4 dept-equivalent regions (GADM L2)
- 1104.2 km²49.9% of basin
- 1000.3 km²45.2% of basin
- 99.8 km²4.5% of basin
- 7.9 km²0.4% of basin
120 communes (GADM L5)Available for FRA, RWA
- Saint-Hilaire-en-Lignières54.77 km²100% commune
- Saint-Août54.25 km²100% commune
- Pruniers48.88 km²100% commune
- Chezal-Benoît46.70 km²100% commune
- Massay44.69 km²93% commune
- La Champenoise43.12 km²95% commune
- Châteaumeillant42.30 km²100% commune
- Neuvy-Pailloux40.98 km²100% commune
- Issoudun37.95 km²100% commune
- Lizeray36.36 km²100% commune
- Préveranges36.27 km²95% commune
- Civray34.58 km²82% commune
- Saint-Saturnin34.44 km²87% commune
- Ségry32.68 km²100% commune
- Le Châtelet32.39 km²100% commune
- Sidiailles32.35 km²100% commune
- Saint-Ambroix32.14 km²100% commune
- Sassierges-Saint-Germain32.03 km²100% commune
- Loye-sur-Arnon30.98 km²90% commune
- Chouday30.52 km²100% commune
- Viplaix30.17 km²97% commune
- Saint-Baudel30.07 km²100% commune
- La Berthenoux29.69 km²74% commune
- Paudy29.17 km²94% commune
- Saint-Aubin29.06 km²100% commune
- Mâron28.32 km²100% commune
- La Celle-Condé28.30 km²100% commune
- Ids-Saint-Roch28.12 km²100% commune
- Bommiers28.09 km²100% commune
- Sainte-Lizaigne27.10 km²100% commune
- Meunet-Planches27.08 km²100% commune
- Lazenay26.99 km²86% commune
- Mareuil-sur-Arnon26.88 km²100% commune
- Primelles26.81 km²100% commune
- Maisonnais26.78 km²100% commune
- Vicq-Exemplet26.77 km²68% commune
- Saint-Christophe-en-Boucherie26.43 km²98% commune
- Reuilly26.40 km²100% commune
- Saint-Maur25.84 km²100% commune
- Ambrault25.72 km²100% commune
- Plou25.54 km²74% commune
- Saint-Valentin25.46 km²100% commune
- Ineuil24.92 km²91% commune
- Reigny24.71 km²100% commune
- Touchay24.15 km²100% commune
- Condé23.94 km²100% commune
- Saint-Georges-sur-Arnon23.71 km²100% commune
- Sainte-Fauste23.37 km²100% commune
- Lignières22.32 km²100% commune
- Rezay21.60 km²100% commune
- Saint-Palais20.54 km²100% commune
- Saint-Pierre-les-Bois20.41 km²100% commune
- Culan20.37 km²100% commune
- Morlac20.28 km²62% commune
- Saint-Aoustrille20.08 km²100% commune
- Brives19.64 km²100% commune
- Montlouis19.23 km²100% commune
- Marçais19.06 km²64% commune
- Ménétréols-sous-Vatan18.65 km²67% commune
- Saint-Jeanvrin18.18 km²100% commune
- Saint-Sauvier18.12 km²57% commune
- Ardenais17.59 km²100% commune
- Saint-Christophe-le-Chaudry17.24 km²100% commune
- Méreau17.12 km²93% commune
- Thizay17.00 km²100% commune
- Diou16.41 km²100% commune
- Les Bordes15.66 km²100% commune
- Vouillon15.39 km²100% commune
- Saint-Pierre-de-Jards15.36 km²83% commune
- Montierchaume15.15 km²40% commune
- Cerbois15.10 km²79% commune
- Lury-sur-Arnon14.10 km²100% commune
- Mesples13.68 km²91% commune
- Chéry13.24 km²100% commune
- Migny13.15 km²100% commune
- Saint-Éloy-d'Allier12.97 km²100% commune
- Diors12.90 km²50% commune
- Beddes12.78 km²100% commune
- Vesdun12.68 km²25% commune
- Saint-Chartier12.61 km²45% commune
- Chârost10.60 km²100% commune
- Poisieux10.35 km²100% commune
- Venesmes9.95 km²31% commune
- Villecelin9.87 km²100% commune
- Néret9.86 km²52% commune
- Ardentes9.70 km²16% commune
- Saugy9.62 km²100% commune
- Urciers8.93 km²46% commune
- Brinay8.82 km²30% commune
- Montipouret6.50 km²23% commune
- Giroux6.50 km²28% commune
- Limeux6.19 km²46% commune
- Saint-Pierre-le-Bost5.42 km²32% commune
- Lunery4.64 km²14% commune
- Saint-Désiré3.85 km²9% commune
- Chambon3.39 km²24% commune
- Brion2.91 km²7% commune
- Saint-Marien2.50 km²19% commune
- Saint-Hilaire-de-Court2.27 km²19% commune
- Arcomps1.93 km²10% commune
- Mers-sur-Indre1.87 km²7% commune
- Lignerolles1.84 km²14% commune
- Dampierre-en-Graçay1.55 km²16% commune
- Vierzon1.32 km²2% commune
- Coings1.00 km²3% commune
- Saint-Symphorien0.76 km²8% commune
- Corquoy0.72 km²3% commune
- Liniez0.70 km²3% commune
- Nohant-Vic0.61 km²3% commune
- Verneuil-sur-Igneraie0.49 km²5% commune
- Chambérat0.40 km²1% commune
- Étrechet0.32 km²2% commune
- Courçais0.09 km²0% commune
- Lapan0.08 km²1% commune
- Orcenais0.06 km²0% commune
- Nohant-en-Graçay0.05 km²0% commune
- Thevet-Saint-Julien0.03 km²0% commune
- Saint-Florent-sur-Cher0.01 km²0% commune
- Saint-Priest-la-Marche0.01 km²0% commune
- Villeneuve-sur-Cher0.00 km²0% commune
10 intersecting protected areas
Basse vallée de l'Arnon
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
13.35 km² overlap
Special Areas of Conservation (Habitats Directive)
3.76 km² overlap
Haute vallée de l'Arnon et petits affluents
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
3.06 km² overlap
Coteaux, bois et marais calcaires de la Champagne Berrichonne
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.50 km² overlap
Le Rosier
IUCN IaForest Integral Biological Reserve
1.10 km² overlap
Marais De Jean Varenne
IUCN IVBiotope Protection Order
0.96 km² overlap
prairies de beauvoir (les)
IUCN IVLand acquired by a regional conservatory of natural areas
0.23 km² overlap
Land acquired by a regional conservatory of natural areas
0.04 km² overlap
carriere cheret (la)
IUCN IVLand acquired by a regional conservatory of natural areas
0.02 km² overlap
1 more protected areassorted by overlap area
Site à chauves-souris de Chârost
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
10 643 distinct species · 795 732 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 42 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'Arnon : 31 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 155 interactions GloBI sur 5 types (connectance 17.2%, 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°
10,9°C
Annual rain
730mm
Moisture idx (CMI)
-0,17
Runoff
240mm/an
PET
876mm
AET
608mm
Mean slope
1,3°
Water table
104cm
Forest
3%
Crops
65%
Urban
1%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)