HydroBASINS lev08 watershed · #2080498990
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 2 administrative regions : Indre-et-Loire, Loir-et-Cher
Sub-basin area
1 528,3km²
Upstream area
42 572,4km²
Discharge
390,7m³/s
Mean elev.
107m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de la Cisse540 km²
- Bassin de la Loire5 km²
2 dept-equivalent regions (GADM L2)
- 1141.5 km²74.5% of basin
- 391.1 km²25.5% of basin
112 communes (GADM L5)Available for FRA, RWA
- Ambillou43.08 km²85% commune
- Vallières-les-Grandes40.61 km²100% commune
- Nouzilly40.25 km²100% commune
- Monnaie39.59 km²100% commune
- Villedômer35.51 km²100% commune
- Luynes34.36 km²100% commune
- Auzouer-en-Touraine33.95 km²100% commune
- Semblançay33.12 km²92% commune
- Fondettes31.77 km²100% commune
- Authon31.61 km²98% commune
- Santenay30.21 km²100% commune
- Reugny30.01 km²100% commune
- Onzain29.83 km²100% commune
- Amboise29.61 km²71% commune
- Saint-Laurent-en-Gâtines28.38 km²88% commune
- Monthodon27.89 km²81% commune
- Mesland27.07 km²100% commune
- Beaumont-la-Ronce26.63 km²68% commune
- Souvigny-de-Touraine26.15 km²100% commune
- Saunay25.62 km²100% commune
- Vernou-sur-Brenne25.58 km²100% commune
- Montreuil-en-Touraine25.29 km²100% commune
- Saint-Antoine-du-Rocher23.77 km²99% commune
- Vouvray23.30 km²100% commune
- Chaumont-sur-Loire23.17 km²86% commune
- Cangey22.51 km²100% commune
- Saint-Cyr-du-Gault22.36 km²86% commune
- Tours22.15 km²66% commune
- Nazelles-Négron21.28 km²100% commune
- Sonzay21.07 km²43% commune
- Saint-Amand-Longpré20.73 km²96% commune
- Autrèche20.53 km²100% commune
- Le Boulay20.13 km²100% commune
- Saint-Ouen-les-Vignes19.15 km²100% commune
- Chanceaux-sur-Choisille18.24 km²100% commune
- Pernay17.87 km²100% commune
- Noizay17.78 km²100% commune
- Rochecorbon17.38 km²100% commune
- Neuillé-le-Lierre16.75 km²100% commune
- Saint-Étienne-de-Chigny16.25 km²76% commune
- Lancé16.02 km²90% commune
- Crotelles15.87 km²100% commune
- Montlouis-sur-Loire15.26 km²62% commune
- Morand15.06 km²100% commune
- Chançay14.91 km²100% commune
- Mosnes14.44 km²100% commune
- Limeray14.16 km²100% commune
- Charentilly14.03 km²100% commune
- Parçay-Meslay13.88 km²100% commune
- Saint-Cyr-sur-Loire13.56 km²100% commune
- Rouziers-de-Touraine12.67 km²70% commune
- Saint-Nicolas-des-Motets12.46 km²100% commune
- Cerelles12.36 km²100% commune
- Villeporcher12.27 km²100% commune
- Prunay-Cassereau11.27 km²34% commune
- Villechauve11.07 km²100% commune
- Mettray10.86 km²100% commune
- Pocé-sur-Cisse10.82 km²100% commune
- Rilly-sur-Loire10.28 km²100% commune
- Saint-Gourgon10.13 km²99% commune
- Orchaise9.85 km²49% commune
- Seillac9.58 km²99% commune
- Dame-Marie-les-Bois9.24 km²100% commune
- Lussault-sur-Loire9.22 km²97% commune
- Saint-Étienne-des-Guérets9.01 km²75% commune
- Chargé7.97 km²100% commune
- Notre-Dame-d'Oé7.88 km²100% commune
- Veuves7.83 km²100% commune
- Pontlevoy7.71 km²15% commune
- Saint-Pierre-des-Corps7.05 km²66% commune
- Neuville-sur-Brenne6.97 km²100% commune
- Berthenay6.79 km²92% commune
- La Membrolle-sur-Choisille6.76 km²100% commune
- Monteaux6.54 km²100% commune
- Saint-Règle6.01 km²100% commune
- Crucheray5.86 km²23% commune
- Cinq-Mars-la-Pile5.51 km²27% commune
- La Ville-aux-Dames5.45 km²68% commune
- La Riche5.17 km²62% commune
- Souvigné5.09 km²20% commune
- Montrichard4.93 km²34% commune
- Chissay-en-Touraine4.88 km²27% commune
- Nourray4.68 km²38% commune
- Saint-Roch4.44 km²100% commune
- Cléré-les-Pins4.40 km²12% commune
- Saint-Genouph4.24 km²88% commune
- Coulanges4.15 km²52% commune
- Chouzy-sur-Cisse3.86 km²17% commune
- Françay3.81 km²18% commune
- Château-Renault3.41 km²100% commune
- Pray3.21 km²30% commune
- Les Hermites2.86 km²9% commune
- Chambon-sur-Cisse2.59 km²20% commune
- Neuillé-Pont-Pierre1.65 km²4% commune
- Ambloy1.54 km²11% commune
- Herbault1.48 km²11% commune
- Gombergean1.38 km²11% commune
- La Ferrière1.36 km²9% commune
- Civray-de-Touraine0.96 km²4% commune
- Chisseaux0.85 km²7% commune
- Mazières-de-Touraine0.68 km²2% commune
- Huisseau-en-Beauce0.63 km²7% commune
- Marray0.55 km²2% commune
- Saint-Martin-le-Beau0.53 km²3% commune
- Saint-Martin-des-Bois0.44 km²1% commune
- Villeromain0.42 km²3% commune
- Louestault0.30 km²2% commune
- Villandry0.30 km²2% commune
- Savonnières0.27 km²2% commune
- Courcelles-de-Touraine0.23 km²1% commune
- Chenonceaux0.15 km²3% commune
- Monthou-sur-Bièvre0.06 km²0% commune
21 intersecting protected areas
Vallée de la Loire d'Indre-et-Loire
IUCN Not ReportedSpecial Protection Area (Birds Directive)
30.03 km² overlap
La Loire de Candes Saint Martin à Mosnes
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
28.03 km² overlap
Complexe du Changeon et de la Roumer
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
9.76 km² overlap
Vallée de la Loire de Mosnes à Tavers
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
4.75 km² overlap
Vallée de la Loire du Loir-et-Cher
IUCN Not ReportedSpecial Protection Area (Birds Directive)
4.75 km² overlap
Lac de Rillé et forêts voisines d'Anjou et de Touraine
IUCN Not ReportedSpecial Protection Area (Birds Directive)
3.82 km² overlap
Bois de Sudais
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.80 km² overlap
Ile Aux Moutons
IUCN IVBiotope Protection Order
1.55 km² overlap
Biotope Protection Order
1.10 km² overlap
12 more protected areassorted by overlap area
Petite Beauce
IUCN Not ReportedSpecial Protection Area (Birds Directive)
0.91 km² overlap
Loire-Anjou-Touraine
IUCN VRegional Nature Park
0.37 km² overlap
iles du gros ormeau (les)
IUCN IVLand acquired by a regional conservatory of natural areas
0.28 km² overlap
Land acquired by a regional conservatory of natural areas
0.16 km² overlap
Biotope Protection Order
0.13 km² overlap
ile de la folie (l\')
IUCN IVLand acquired by a regional conservatory of natural areas
0.12 km² overlap
prairies de choisille (les)
IUCN IVLand acquired by a regional conservatory of natural areas
0.10 km² overlap
ile cesar (l\')
IUCN IVLand acquired by a regional conservatory of natural areas
0.07 km² overlap
frilliere (la)
IUCN IVLand acquired by a regional conservatory of natural areas
0.05 km² overlap
prairie de neuville
IUCN IVLand acquired by a regional conservatory of natural areas
0.04 km² overlap
source de la folie (la)
IUCN IVLand acquired by a regional conservatory of natural areas
0.00 km² overlap
ile de bondesir (l\')
IUCN IVLand acquired by a regional conservatory of natural areas
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
7 735 distinct species · 1 051 143 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 la Loire : 15 espèces reliées par 262 interactions GloBI sur 6 types (connectance 12.6%, filtre Serrano α=0.2). 50 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°
11,2°C
Annual rain
673mm
Moisture idx (CMI)
-0,22
Runoff
203mm/an
PET
861mm
AET
566mm
Mean slope
1,3°
Water table
98cm
Forest
6%
Crops
52%
Urban
8%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)