HydroBASINS lev08 watershed · #2080554170
Bassin de la Garonne
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 : Gironde
Sub-basin area
1 178,7km²
Upstream area
55 370,9km²
Discharge
657,26m³/s
Mean elev.
50m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin du Ciron1272 km²
- Bassin du Beuve368 km²
1 dept-equivalent regions (GADM L2)
- 1181.3 km²100.0% of basin
99 communes (GADM L5)Available for FRA, RWA
- Saucats85.09 km²96% commune
- Cestas77.47 km²78% commune
- Cabanac-et-Villagrains69.07 km²100% commune
- Saint-Magne54.24 km²65% commune
- Léognan41.30 km²100% commune
- Bordeaux40.74 km²82% commune
- Mérignac35.02 km²72% commune
- Pessac31.57 km²82% commune
- Illats27.69 km²96% commune
- Targon23.66 km²90% commune
- La Brède23.32 km²100% commune
- Villenave-d'Ornon21.19 km²100% commune
- Saint-Morillon20.70 km²100% commune
- Louchats20.58 km²52% commune
- Saint-Michel-de-Rieufret19.67 km²100% commune
- Landiras18.69 km²31% commune
- Capian18.25 km²100% commune
- Saint-Selve17.43 km²100% commune
- Martillac17.06 km²100% commune
- Gradignan16.10 km²100% commune
- Cadaujac15.43 km²100% commune
- Portets15.11 km²100% commune
- Guillos14.98 km²66% commune
- Sadirac14.91 km²77% commune
- Virelade13.60 km²100% commune
- Saint-Médard-d'Eyrans12.74 km²100% commune
- Canéjan12.19 km²100% commune
- Soulignac11.66 km²100% commune
- Hostens11.42 km²20% commune
- Rions11.14 km²100% commune
- Bègles11.07 km²100% commune
- Haux10.42 km²100% commune
- Langoiran10.11 km²100% commune
- Saint-Caprais-de-Bordeaux10.05 km²100% commune
- Latresne9.97 km²100% commune
- Loupiac9.43 km²100% commune
- Barsac9.41 km²65% commune
- Camblanes-et-Meynac9.30 km²100% commune
- Arbis9.28 km²100% commune
- Lignan-de-Bordeaux8.97 km²100% commune
- Carignan-de-Bordeaux8.73 km²100% commune
- Le Barp8.72 km²8% commune
- Saint-Pierre-de-Bat8.66 km²98% commune
- Floirac8.44 km²97% commune
- Podensac8.13 km²100% commune
- Arbanats8.08 km²100% commune
- Tabanac8.01 km²100% commune
- Talence7.95 km²100% commune
- Quinsac7.68 km²100% commune
- Bouliac7.64 km²100% commune
- Cénac7.47 km²100% commune
- Baurech7.45 km²100% commune
- La Sauve7.17 km²39% commune
- Castres-Gironde6.88 km²100% commune
- Ayguemorte-les-Graves6.41 km²100% commune
- Beautiran6.33 km²100% commune
- Bassens6.27 km²59% commune
- Cantois6.27 km²77% commune
- Saint-Genès-de-Lombaud6.21 km²100% commune
- Cérons5.85 km²100% commune
- Fargues-Saint-Hilaire5.69 km²78% commune
- Cambes5.51 km²100% commune
- Le Bouscat5.50 km²100% commune
- Montignac5.50 km²84% commune
- Cadillac5.39 km²100% commune
- Créon5.27 km²65% commune
- Mourens5.13 km²45% commune
- Escoussans4.87 km²100% commune
- Cardan4.41 km²100% commune
- Lormont4.41 km²55% commune
- Isle-Saint-Georges4.29 km²100% commune
- Donzac4.20 km²98% commune
- Ladaux4.20 km²100% commune
- Eysines4.16 km²36% commune
- Gornac3.86 km²47% commune
- Bonnetan3.84 km²94% commune
- Cenon3.80 km²66% commune
- Bruges3.75 km²27% commune
- Monprimblanc3.72 km²76% commune
- Béguey3.44 km²100% commune
- Laroque2.84 km²100% commune
- Gabarnac2.78 km²53% commune
- Le Tourne2.74 km²100% commune
- Lestiac-sur-Garonne2.67 km²100% commune
- Paillet2.62 km²100% commune
- Omet2.50 km²100% commune
- Saint-Jean-d'Illac2.26 km²2% commune
- Villenave-de-Rions2.12 km²100% commune
- Loupes2.08 km²40% commune
- Sallebœuf2.06 km²14% commune
- Tresses2.03 km²16% commune
- Madirac1.85 km²100% commune
- Pujols-sur-Ciron1.26 km²16% commune
- Sainte-Croix-du-Mont1.16 km²13% commune
- Carbon-Blanc0.57 km²15% commune
- Bellebat0.30 km²6% commune
- Preignac0.09 km²1% commune
- Le Tuzan0.02 km²0% commune
- Le Haillan0.01 km²0% commune
11 intersecting protected areas
Landes De Gascogne
IUCN VRegional Nature Park
94.61 km² overlap
La Garonne en Nouvelle-Aquitaine
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
19.46 km² overlap
Bocage humide de Cadaujac et Saint-Médard-d'Eyrans
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
15.91 km² overlap
Réseau hydrographique du Gat Mort et du Saucats
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
14.01 km² overlap
Réseau hydrographique de la Pimpine
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
3.47 km² overlap
Vallée de l'Euille
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
3.32 km² overlap
Lagunes de Saint-Magne et Louchats
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.93 km² overlap
Domaine départemental d'Hostens
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.43 km² overlap
Saucats Et La Brède
IUCN IIINational Nature Reserve
0.81 km² overlap
2 more protected areassorted by overlap area
Carrières de Cénac
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.23 km² overlap
Vallée du Ciron
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.01 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
9 410 distinct species · 679 779 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 42 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 Garonne : 37 espèces + 5 bulles famille, 110 interactions GloBI documentées sur 5 types (connectance 12.8%, filtre Serrano α=0.2). Les 5 bulles regroupent des espèces visuellement absorbées par famille (≥3 espèces visibles).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydroclimate (BasinATLAS lev08)
Mean T°
12,6°C
Annual rain
946mm
Moisture idx (CMI)
-0,02
Runoff
463mm/an
PET
969mm
AET
690mm
Mean slope
1,3°
Water table
88cm
Forest
34%
Crops
26%
Urban
27%
Protected
8%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)