HydroBASINS lev08 watershed · #2080020480
Bassin de Canal des Étangs
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
982,6km²
Upstream area
982,8km²
Discharge
12,59m³/s
Mean elev.
27m
Administrative coverage
1 dept-equivalent regions (GADM L2)
- 984.7 km²100.0% of basin
16 communes (GADM L5)Available for FRA, RWA
- Lacanau169.84 km²77% commune
- Carcans169.81 km²85% commune
- Hourtin160.88 km²72% commune
- Sainte-Hélène113.92 km²87% commune
- Le Porge104.99 km²70% commune
- Le Temple64.15 km²89% commune
- Saumos57.31 km²100% commune
- Lège-Cap-Ferret36.81 km²37% commune
- Brach28.44 km²100% commune
- Saint-Laurent-Médoc24.15 km²18% commune
- Arès20.30 km²41% commune
- Lanton16.19 km²12% commune
- Salaunes11.50 km²27% commune
- Listrac-Médoc3.45 km²6% commune
- Naujac-sur-Mer2.81 km²3% commune
- Saint-Jean-d'Illac0.08 km²0% commune
20 intersecting protected areas
Médoc
IUCN VRegional Nature Park
911.17 km² overlap
Zones humides de l'arrière dune du littoral girondin
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
108.70 km² overlap
Côte médocaine : dunes boisées et dépression humides
IUCN Not ReportedSpecial Protection Area (Birds Directive)
27.65 km² overlap
Landes De Gascogne
IUCN VRegional Nature Park
15.82 km² overlap
Boisements à chênes verts des dunes du littoral girondin
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
15.38 km² overlap
Dunes Et Marais D\'Hourtin
IUCN IVNational Nature Reserve
9.43 km² overlap
Marais du Nord Médoc
IUCN Not ReportedSpecial Protection Area (Birds Directive)
7.84 km² overlap
Étang Du Cousseau
IUCN IVNational Nature Reserve
6.00 km² overlap
Forest Managed Biological Reserve
2.15 km² overlap
11 more protected areassorted by overlap area
Marais du Bas Médoc
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
2.11 km² overlap
Etang de cousseau
IUCN IVLand acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)
1.87 km² overlap
Etang de lacanau
IUCN IVLand acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)
1.43 km² overlap
Land acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)
1.26 km² overlap
Bassin d'Arcachon et Cap Ferret
IUCN Not ReportedMarine Protected Area (OSPAR)
1.24 km² overlap
Bassin d'Arcachon et Cap Ferret
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.24 km² overlap
Bassin d'Arcachon et banc d'Arguin
IUCN Not ReportedSpecial Protection Area (Birds Directive)
1.24 km² overlap
National Nature Reserve
1.23 km² overlap
Dunes et forets du porge
IUCN IVLand acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)
0.82 km² overlap
Bassin D\'Arcachon
IUCN VMarine Nature Park
0.65 km² overlap
Etang de carcans - hourtin
IUCN IVLand acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)
0.21 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
5 613 distinct species · 316 597 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 40 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 Canal des Étangs : 32 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 99 interactions GloBI sur 6 types (connectance 12.7%, 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°
12,8°C
Annual rain
995mm
Moisture idx (CMI)
0,09
Runoff
472mm/an
PET
908mm
AET
680mm
Mean slope
0,5°
Water table
30cm
Forest
81%
Crops
5%
Urban
0%
Protected
2%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)