HydroBASINS lev08 watershed · #2080501620
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 : Loire-Atlantique
Sub-basin area
190,5km²
Upstream area
115 298,1km²
Discharge
998,45m³/s
Mean elev.
19m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de l'Erdre1019 km²
- Bassin de la Sèvre Nantaise6 km²
1 dept-equivalent regions (GADM L2)
- 191.0 km²100.0% of basin
16 communes (GADM L5)Available for FRA, RWA
- Saint-Étienne-de-Montluc45.91 km²80% commune
- Couëron43.30 km²89% commune
- Bouguenais28.39 km²91% commune
- Le Pellerin18.97 km²61% commune
- Saint-Herblain17.53 km²59% commune
- Saint-Jean-de-Boiseau10.90 km²96% commune
- Nantes8.06 km²12% commune
- Indre4.44 km²100% commune
- La Montagne3.75 km²99% commune
- Rouans3.28 km²9% commune
- Rezé3.14 km²20% commune
- Bouaye1.85 km²13% commune
- Cordemais0.57 km²2% commune
- Brains0.57 km²4% commune
- Saint-Aignan-Grandlieu0.35 km²2% commune
- Cheix-en-Retz0.01 km²0% commune
7 intersecting protected areas
Estuaire de la Loire
IUCN Not ReportedSpecial Protection Area (Birds Directive)
56.46 km² overlap
Estuaire de la Loire
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
56.26 km² overlap
Estuaire de la loire
IUCN IVLand acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)
2.69 km² overlap
Biotope Protection Order
0.01 km² overlap
Biotope Protection Order
0.00 km² overlap
La carrière de Misery
IUCN IVGeotope Protection Order
0.00 km² overlap
La carrière de Misery
IUCN Not ReportedGeotope Protection Order
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
4 125 distinct species · 121 195 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 : 22 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 120 interactions GloBI sur 6 types (connectance 20.2%, 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
795mm
Moisture idx (CMI)
-0,03
Runoff
514mm/an
PET
816mm
AET
579mm
Mean slope
1,0°
Water table
87cm
Forest
0%
Crops
33%
Urban
40%
Protected
1%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)