HydroBASINS lev08 watershed · #2080020590
Bassin du Gua
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
202,9km²
Upstream area
55 941,2km²
Discharge
658,06m³/s
Mean elev.
25m
Administrative coverage
Hydrographic chain
▼ Drains into
Outlet (drains to ocean / endorheic)
▲ Receives from 3 basins
- Bassin de la Garonne1179 km²
- Bassin de la Jalle367 km²
- Bassin · #208010470078 km²
1 dept-equivalent regions (GADM L2)
- 203.3 km²100.0% of basin
27 communes (GADM L5)Available for FRA, RWA
- Blanquefort28.99 km²84% commune
- Le Pian-Médoc27.41 km²91% commune
- Parempuyre21.88 km²100% commune
- Saint-Aubin-de-Médoc17.70 km²51% commune
- Ludon-Médoc13.32 km²72% commune
- Ambarès-et-Lagrave11.66 km²47% commune
- Saint-Louis-de-Montferrand10.41 km²91% commune
- Tresses9.95 km²81% commune
- Sainte-Eulalie9.10 km²100% commune
- Arsac8.62 km²26% commune
- Yvrac8.14 km²95% commune
- Artigues-près-Bordeaux6.96 km²100% commune
- Avensan6.41 km²12% commune
- Bassens4.40 km²41% commune
- Ambès4.03 km²17% commune
- Lormont3.59 km²45% commune
- Carbon-Blanc3.26 km²85% commune
- Cenon1.97 km²34% commune
- Bordeaux1.53 km²3% commune
- Saint-Loubès1.50 km²6% commune
- Le Taillan-Médoc1.31 km²9% commune
- Pompignac0.58 km²5% commune
- Floirac0.29 km²3% commune
- Bruges0.27 km²2% commune
- Carignan-de-Bordeaux0.02 km²0% commune
- Macau0.01 km²0% commune
- Fargues-Saint-Hilaire0.01 km²0% commune
8 intersecting protected areas
Médoc
IUCN VRegional Nature Park
55.73 km² overlap
La Garonne en Nouvelle-Aquitaine
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
9.25 km² overlap
Marais du Bec d'Ambès
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
9.16 km² overlap
Protected perimeter around a national nature reserve
0.52 km² overlap
Marais de Bruges, Blanquefort et Parampuyre
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.40 km² overlap
Marais De Bruges
IUCN IVNational Nature Reserve
0.31 km² overlap
Biotope Protection Order
0.28 km² overlap
Marais de Bruges
IUCN Not ReportedSpecial Protection Area (Birds Directive)
0.27 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
3 047 distinct species · 106 371 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 du Gua : 32 espèces + 6 bulles famille, 109 interactions GloBI documentées sur 5 types (connectance 15.5%, filtre Serrano α=0.2). Les 6 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°
12,7°C
Annual rain
927mm
Moisture idx (CMI)
-0,03
Runoff
492mm/an
PET
955mm
AET
676mm
Mean slope
0,7°
Water table
43cm
Forest
20%
Crops
27%
Urban
37%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)