HydroBASINS lev08 watershed · #2080020490
Bassin de Craste de Loupdat
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
1 548,3km²
Upstream area
1 548,3km²
Discharge
6,08m³/s
Mean elev.
16m
Administrative coverage
1 dept-equivalent regions (GADM L2)
- 1501.0 km²96.7% of basin
59 communes (GADM L5)Available for FRA, RWA
- Saint-Laurent-Médoc113.01 km²82% commune
- Vendays-Montalivet100.87 km²100% commune
- Naujac-sur-Mer96.05 km²97% commune
- Hourtin61.20 km²28% commune
- Lège-Cap-Ferret60.65 km²61% commune
- Listrac-Médoc57.25 km²94% commune
- Lacanau49.53 km²23% commune
- Jau-Dignac-et-Loirac47.78 km²100% commune
- Grayan-et-l'Hôpital46.01 km²100% commune
- Saint-Germain-d'Esteuil45.85 km²100% commune
- Avensan45.73 km²88% commune
- Le Porge44.09 km²30% commune
- Gaillan-en-Médoc41.80 km²100% commune
- Lesparre-Médoc36.07 km²100% commune
- Vensac33.53 km²100% commune
- Carcans31.01 km²15% commune
- Soulac-sur-Mer30.78 km²100% commune
- Queyrac30.47 km²100% commune
- Saint-Vivien-de-Médoc28.97 km²100% commune
- Saint-Estèphe24.66 km²100% commune
- Arsac24.37 km²74% commune
- Castelnau-de-Médoc24.17 km²100% commune
- Pauillac23.42 km²100% commune
- Cissac-Médoc23.23 km²100% commune
- Le Verdon-sur-Mer22.81 km²100% commune
- Bégadan22.63 km²100% commune
- Saint-Sauveur21.72 km²100% commune
- Vertheuil21.62 km²100% commune
- Moulis-en-Médoc20.69 km²100% commune
- Talais20.54 km²100% commune
- Civrac-en-Médoc18.63 km²100% commune
- Cussac-Fort-Médoc18.61 km²100% commune
- Macau17.30 km²94% commune
- Saint-Julien-Beychevelle16.32 km²96% commune
- Sainte-Hélène15.80 km²12% commune
- Saint-Seurin-de-Cadourne15.67 km²100% commune
- Soussans15.00 km²100% commune
- Cantenac14.44 km²100% commune
- Valeyrac12.86 km²100% commune
- Salaunes11.84 km²28% commune
- Saint-Yzans-de-Médoc11.80 km²100% commune
- Ordonnac10.44 km²100% commune
- Saint-Christoly-Médoc8.12 km²100% commune
- Lamarque7.53 km²100% commune
- Prignac-en-Médoc7.25 km²100% commune
- Blaignan7.18 km²100% commune
- Arcins6.84 km²100% commune
- Margaux6.40 km²100% commune
- Couquèques6.03 km²100% commune
- Ludon-Médoc5.14 km²28% commune
- Labarde4.59 km²100% commune
- Bayon-sur-Gironde3.55 km²47% commune
- Le Pian-Médoc2.67 km²9% commune
- Saint-Aubin-de-Médoc2.21 km²6% commune
- Gauriac2.16 km²34% commune
- Plassac1.27 km²16% commune
- Villeneuve0.75 km²18% commune
- Brach0.07 km²0% commune
- Ambès0.02 km²0% commune
30 intersecting protected areas
Médoc
IUCN VRegional Nature Park
1391.94 km² overlap
Marais du Nord Médoc
IUCN Not ReportedSpecial Protection Area (Birds Directive)
157.35 km² overlap
Marais du Bas Médoc
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
144.78 km² overlap
Dunes du littoral girondin de la Pointe de Grave au Cap Ferret
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
60.02 km² overlap
Marais du Haut Médoc
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
50.62 km² overlap
Estuaire de la Gironde
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
36.60 km² overlap
Marine Nature Park
35.54 km² overlap
Dunes et forets du porge
IUCN IVLand acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)
15.07 km² overlap
Dunes Et Marais D\'Hourtin
IUCN IVNational Nature Reserve
11.67 km² overlap
21 more protected areassorted by overlap area
Côte médocaine : dunes boisées et dépression humides
IUCN Not ReportedSpecial Protection Area (Birds Directive)
11.15 km² overlap
Bassin D\'Arcachon
IUCN VMarine Nature Park
9.96 km² overlap
Bassin d'Arcachon et Cap Ferret
IUCN Not ReportedMarine Protected Area (OSPAR)
6.81 km² overlap
Bassin d'Arcachon et banc d'Arguin
IUCN Not ReportedSpecial Protection Area (Birds Directive)
6.81 km² overlap
Bassin d'Arcachon et Cap Ferret
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
6.80 km² overlap
La grande ile
IUCN IVLand acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)
5.38 km² overlap
Boisements à chênes verts des dunes du littoral girondin
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
5.35 km² overlap
Les mattes de paladon
IUCN IVLand acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)
4.26 km² overlap
La Garonne en Nouvelle-Aquitaine
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
4.08 km² overlap
Dune de vensac
IUCN IVLand acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)
3.77 km² overlap
Forêt de la Pointe de Grave
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
3.02 km² overlap
Dunes du cap ferret
IUCN IVLand acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)
2.33 km² overlap
National Nature Reserve
0.99 km² overlap
Panache de la Gironde
IUCN Not ReportedSpecial Protection Area (Birds Directive)
0.64 km² overlap
Panache de la Gironde et plateau rocheux de Cordouan
IUCN Not ReportedMarine Protected Area (OSPAR)
0.64 km² overlap
Special Areas of Conservation (Habitats Directive)
0.64 km² overlap
Panache de la Gironde
IUCN Not ReportedMarine Protected Area (OSPAR)
0.63 km² overlap
Land acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)
0.59 km² overlap
Dune et pointe de grave
IUCN IVLand acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)
0.48 km² overlap
Reservoirs de piraillan
IUCN IVLand acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)
0.38 km² overlap
Land acquired by a regional conservatory of natural areas
0.31 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
6 331 distinct species · 222 185 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 de Craste de Loupdat : 33 espèces + 5 bulles famille, 112 interactions GloBI documentées sur 5 types (connectance 15.9%, 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°
12,8°C
Annual rain
943mm
Moisture idx (CMI)
0,04
Runoff
501mm/an
PET
903mm
AET
661mm
Mean slope
0,6°
Water table
39cm
Forest
42%
Crops
33%
Urban
1%
Protected
2%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)