HydroBASINS lev08 watershed · #2080500310
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 : Indre-et-Loire
Sub-basin area
16km²
Upstream area
56 479,3km²
Discharge
493,9m³/s
Mean elev.
53m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de la Roumer122 km²
- Bassin de Ruisseau du Breuil105 km²
1 dept-equivalent regions (GADM L2)
- 16.1 km²100.0% of basin
6 communes (GADM L5)Available for FRA, RWA
- Langeais5.50 km²9% commune
- Lignières-de-Touraine4.74 km²48% commune
- Bréhémont3.52 km²27% commune
- La Chapelle-aux-Naux1.87 km²34% commune
- Saint-Michel-sur-Loire0.45 km²3% commune
- Azay-le-Rideau0.02 km²0% commune
7 intersecting protected areas
Loire-Anjou-Touraine
IUCN VRegional Nature Park
16.09 km² overlap
La Loire de Candes Saint Martin à Mosnes
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
3.31 km² overlap
Vallée de la Loire d'Indre-et-Loire
IUCN Not ReportedSpecial Protection Area (Birds Directive)
2.73 km² overlap
Basses vallées de la Vienne et de l'Indre
IUCN Not ReportedSpecial Protection Area (Birds Directive)
1.82 km² overlap
Lac de Rillé et forêts voisines d'Anjou et de Touraine
IUCN Not ReportedSpecial Protection Area (Birds Directive)
0.64 km² overlap
ile aux boeufs (l\')
IUCN IVLand acquired by a regional conservatory of natural areas
0.45 km² overlap
greves (les)
IUCN IVLand acquired by a regional conservatory of natural areas
0.18 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 854 distinct species · 101 483 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 41 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 : 32 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 134 interactions GloBI sur 5 types (connectance 15.6%, 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°
11,5°C
Annual rain
673mm
Moisture idx (CMI)
-0,23
Runoff
198mm/an
PET
879mm
AET
568mm
Mean slope
1,4°
Water table
110cm
Forest
7%
Crops
45%
Urban
0%
Protected
100%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)