HydroBASINS lev08 watershed · #2080488940
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 : Loir-et-Cher, Loiret
Sub-basin area
146,1km²
Upstream area
37 823,4km²
Discharge
358,19m³/s
Mean elev.
103m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de la Mauve248 km²
- Bassin de la Mauve de Saint-Ay139 km²
2 dept-equivalent regions (GADM L2)
- 106.1 km²72.4% of basin
- 40.5 km²27.6% of basin
18 communes (GADM L5)Available for FRA, RWA
- Cravant24.67 km²72% commune
- Tavers21.59 km²100% commune
- Josnes14.98 km²71% commune
- Beaugency14.93 km²87% commune
- Baule11.96 km²100% commune
- Villorceau9.25 km²100% commune
- Lestiou8.67 km²100% commune
- Meung-sur-Loire8.66 km²42% commune
- Avaray7.58 km²53% commune
- Le Bardon5.61 km²46% commune
- Saint-Laurent-Nouan5.52 km²9% commune
- Messas5.17 km²100% commune
- Séris2.72 km²16% commune
- Dry2.19 km²10% commune
- Lailly-en-Val1.86 km²4% commune
- Lorges0.77 km²6% commune
- Villermain0.27 km²1% commune
- Mareau-aux-Prés0.17 km²1% commune
8 intersecting protected areas
Vallée de la Loire du Loiret
IUCN Not ReportedSpecial Protection Area (Birds Directive)
10.42 km² overlap
Vallée de la Loire de Tavers à Belleville-sur-Loire
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
7.67 km² overlap
Vallée de la Loire du Loir-et-Cher
IUCN Not ReportedSpecial Protection Area (Birds Directive)
1.78 km² overlap
Vallée de la Loire de Mosnes à Tavers
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.78 km² overlap
Biotope Protection Order
0.45 km² overlap
Petite Beauce
IUCN Not ReportedSpecial Protection Area (Birds Directive)
0.14 km² overlap
pelouse de vau (la)
IUCN IVLand acquired by a regional conservatory of natural areas
0.05 km² overlap
Biotope Protection Order
0.03 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
4 033 distinct species · 127 870 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 : 27 espèces reliées par 85 interactions GloBI sur 4 types (connectance 14.3%, filtre Serrano α=0.2). 8 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
640mm
Moisture idx (CMI)
-0,25
Runoff
216mm/an
PET
850mm
AET
540mm
Mean slope
0,4°
Water table
29cm
Forest
0%
Crops
53%
Urban
11%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)