HydroBASINS lev08 watershed · #2080501150
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 3 administrative regions : Indre-et-Loire, Maine-et-Loire, Vienne
Sub-basin area
95,7km²
Upstream area
81 075,1km²
Discharge
741,27m³/s
Mean elev.
50m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de la Vienne1303 km²
- Bassin de la Loire199 km²
3 dept-equivalent regions (GADM L2)
- 78.2 km²81.6% of basin
- 16.7 km²17.5% of basin
- 0.9 km²1.0% of basin
15 communes (GADM L5)Available for FRA, RWA
- Saumur20.30 km²30% commune
- Varennes-sur-Loire16.45 km²69% commune
- Fontevraud-l'Abbaye13.22 km²87% commune
- Chouzé-sur-Loire11.18 km²41% commune
- Villebernier7.14 km²71% commune
- Turquant6.72 km²84% commune
- Parnay5.52 km²83% commune
- Montsoreau5.08 km²100% commune
- Souzay-Champigny3.77 km²41% commune
- Candes-Saint-Martin3.41 km²61% commune
- Couziers2.04 km²17% commune
- Saix0.65 km²3% commune
- Roiffé0.28 km²1% commune
- Savigny-en-Véron0.12 km²1% commune
- Épieds0.04 km²0% commune
7 intersecting protected areas
Loire-Anjou-Touraine
IUCN VRegional Nature Park
94.90 km² overlap
Vallée de la Loire des Ponts-de-Cé à Montsoreau
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
18.83 km² overlap
Vallée de la Loire des Ponts-de-Cé à Montsoreau
IUCN Not ReportedSpecial Protection Area (Birds Directive)
14.05 km² overlap
Biotope Protection Order
5.06 km² overlap
La Loire de Candes Saint Martin à Mosnes
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.16 km² overlap
Vallée de la Loire d'Indre-et-Loire
IUCN Not ReportedSpecial Protection Area (Birds Directive)
1.16 km² overlap
Basses vallées de la Vienne et de l'Indre
IUCN Not ReportedSpecial Protection Area (Birds Directive)
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
4 897 distinct species · 124 772 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 38 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 : 25 espèces reliées par 144 interactions GloBI sur 6 types (connectance 20.5%, filtre Serrano α=0.2). 13 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°
11,6°C
Annual rain
679mm
Moisture idx (CMI)
-0,23
Runoff
199mm/an
PET
877mm
AET
569mm
Mean slope
1,4°
Water table
122cm
Forest
3%
Crops
48%
Urban
12%
Protected
99%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)