HydroBASINS lev08 watershed · #2080495170
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 1 administrative regions : Loir-et-Cher
Sub-basin area
303,5km²
Upstream area
38 361,7km²
Discharge
362,32m³/s
Mean elev.
97m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de l'Ardoux235 km²
- Bassin de la Loire146 km²
1 dept-equivalent regions (GADM L2)
- 304.4 km²100.0% of basin
34 communes (GADM L5)Available for FRA, RWA
- Suèvres36.67 km²100% commune
- Blois31.58 km²84% commune
- Mer26.80 km²100% commune
- Saint-Laurent-Nouan21.17 km²34% commune
- Séris14.78 km²84% commune
- Saint-Denis-sur-Loire12.35 km²100% commune
- Montlivault11.04 km²100% commune
- Vineuil11.03 km²50% commune
- Villexanton10.18 km²91% commune
- Muides-sur-Loire8.90 km²100% commune
- Saint-Claude-de-Diray8.79 km²98% commune
- Chambord8.11 km²15% commune
- La Chapelle-Saint-Martin-en-Plai8.03 km²35% commune
- Villerbon7.82 km²44% commune
- Courbouzon7.24 km²100% commune
- Avaray6.59 km²47% commune
- Chouzy-sur-Cisse6.49 km²29% commune
- La Chaussée-Saint-Victor6.46 km²100% commune
- Maslives6.43 km²85% commune
- Cour-sur-Loire5.99 km²100% commune
- Josnes5.85 km²28% commune
- Talcy5.76 km²37% commune
- Saint-Dyé-sur-Loire5.35 km²100% commune
- Concriers4.81 km²100% commune
- Menars4.48 km²100% commune
- Chailles3.33 km²17% commune
- Crouy-sur-Cosson3.29 km²12% commune
- Huisseau-sur-Cosson3.11 km²14% commune
- Mulsans3.00 km²19% commune
- Villebarou2.57 km²28% commune
- Candé-sur-Beuvron2.49 km²17% commune
- Lorges1.95 km²14% commune
- Roches1.40 km²17% commune
- Chambon-sur-Cisse0.50 km²4% commune
8 intersecting protected areas
Petite Beauce
IUCN Not ReportedSpecial Protection Area (Birds Directive)
69.71 km² overlap
Vallée de la Loire du Loir-et-Cher
IUCN Not ReportedSpecial Protection Area (Birds Directive)
15.96 km² overlap
Vallée de la Loire de Mosnes à Tavers
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
14.76 km² overlap
Chambord
IUCN IVNational Hunting and Wildlife Reserve
8.20 km² overlap
Domaine de Chambord
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
4.65 km² overlap
Domaine de Chambord
IUCN Not ReportedSpecial Protection Area (Birds Directive)
4.65 km² overlap
Biotope Protection Order
0.52 km² overlap
bosquets de seris (les)
IUCN IVLand acquired by a regional conservatory of natural areas
0.07 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
6 518 distinct species · 307 334 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 Loire : 28 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 92 interactions GloBI sur 5 types (connectance 15.5%, filtre Serrano α=0.2). 7 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°
11,0°C
Annual rain
646mm
Moisture idx (CMI)
-0,24
Runoff
210mm/an
PET
854mm
AET
545mm
Mean slope
0,7°
Water table
70cm
Forest
3%
Crops
47%
Urban
11%
Protected
3%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)