HydroBASINS lev08 watershed · #2080578890
Bassin de la Bidouze
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 2 administrative regions : Landes, Pyrénées-Atlantiques
Sub-basin area
1 085,1km²
Upstream area
15 788,1km²
Discharge
340,17m³/s
Mean elev.
159m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de l'Adour198 km²
- Bassin des Gaves Réunis57 km²
2 dept-equivalent regions (GADM L2)
- 1000.6 km²92.0% of basin
- 86.5 km²8.0% of basin
91 communes (GADM L5)Available for FRA, RWA
- Hasparren69.47 km²90% commune
- Bardos42.96 km²100% commune
- Orègue36.57 km²100% commune
- Briscous31.95 km²100% commune
- Saint-Just-Ibarre30.97 km²100% commune
- Bidache29.80 km²100% commune
- Lantabat29.07 km²100% commune
- Ayherre28.39 km²100% commune
- Guiche24.87 km²100% commune
- Beyrie-sur-Joyeuse24.58 km²100% commune
- La Bastide-Clairence23.22 km²100% commune
- Arraute-Charritte23.14 km²100% commune
- Mouguerre22.58 km²99% commune
- Saint-Martin-de-Seignanx21.06 km²46% commune
- Iholdy20.68 km²94% commune
- Mendionde19.54 km²89% commune
- Urt18.96 km²100% commune
- Larceveau-Arros-Cibits18.79 km²100% commune
- Came18.16 km²52% commune
- Hélette18.15 km²77% commune
- Saint-Laurent-de-Gosse17.83 km²100% commune
- Hosta17.59 km²100% commune
- Armendarits17.37 km²100% commune
- Pagolle16.46 km²100% commune
- Amorots-Succos15.43 km²100% commune
- Ostabat-Asme15.02 km²100% commune
- Juxue14.93 km²100% commune
- Saint-Martin-d'Arberoue14.33 km²100% commune
- Saint-Esteben13.96 km²100% commune
- Isturits13.74 km²100% commune
- Urcuit13.56 km²100% commune
- Sainte-Marie-de-Gosse13.48 km²51% commune
- Méharin12.43 km²100% commune
- Musculdy12.24 km²51% commune
- Arbouet-Sussaute12.19 km²85% commune
- Uhart-Mixe11.64 km²100% commune
- Béguios11.58 km²100% commune
- Lohitzun-Oyhercq11.37 km²64% commune
- Bergouey-Viellenave11.19 km²100% commune
- Bayonne10.97 km²42% commune
- Ilharre10.56 km²100% commune
- Larribar-Sorhapuru10.37 km²100% commune
- Biaudos10.25 km²68% commune
- Aïcirits-Camou-Suhast9.74 km²100% commune
- Domezain-Berraute9.67 km²44% commune
- Ordiarp9.57 km²30% commune
- Orsanco9.57 km²100% commune
- Ainharp9.38 km²67% commune
- Lahonce9.29 km²100% commune
- Aussurucq8.99 km²19% commune
- Labets-Biscay8.93 km²100% commune
- Hastingues8.48 km²56% commune
- Masparraute8.37 km²100% commune
- Ibarrolle8.20 km²98% commune
- Gabat8.10 km²100% commune
- Luxe-Sumberraute8.01 km²100% commune
- Sames7.93 km²62% commune
- Amendeuix-Oneix7.76 km²100% commune
- Saint-Palais7.65 km²100% commune
- Béhorléguy7.31 km²37% commune
- Bunus6.20 km²100% commune
- Arhansus5.73 km²100% commune
- Béhasque-Lapiste5.69 km²100% commune
- Jatxou5.62 km²40% commune
- Saint-Barthélemy5.56 km²100% commune
- Arbérats-Sillègue5.01 km²98% commune
- Arancou4.94 km²95% commune
- Tarnos4.92 km²18% commune
- Gamarthe3.93 km²38% commune
- Bussunarits-Sarrasquette3.09 km²26% commune
- Macaye3.02 km²16% commune
- Garris2.90 km²100% commune
- Biarrotte2.85 km²59% commune
- Saint-Pierre-d'Irube2.58 km²34% commune
- Labastide-Villefranche2.32 km²15% commune
- Lecumberry2.19 km²4% commune
- Saint-André-de-Seignanx2.05 km²10% commune
- Garindein1.98 km²30% commune
- Abitain1.94 km²29% commune
- Ainhice-Mongelos1.60 km²16% commune
- Villefranque0.94 km²6% commune
- Cambo-les-Bains0.81 km²3% commune
- Bonloc0.78 km²100% commune
- Halsou0.77 km²13% commune
- Autevielle-Saint-Martin-Bideren0.67 km²11% commune
- Suhescun0.23 km²2% commune
- Viodos-Abense-de-Bas0.20 km²2% commune
- Mauléon-Licharre0.11 km²1% commune
- Irissarry0.06 km²0% commune
- Ahaxe-Alciette-Bascassan0.02 km²0% commune
- Mendive0.00 km²0% commune
15 intersecting protected areas
Barthes de l'Adour
IUCN Not ReportedSpecial Protection Area (Birds Directive)
71.88 km² overlap
Massif des Arbailles
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
45.55 km² overlap
Haute Soule : forêt des Arbailles
IUCN Not ReportedSpecial Protection Area (Birds Directive)
31.20 km² overlap
La Bidouze (cours d'eau)
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
25.65 km² overlap
Barthes de l'Adour
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
25.60 km² overlap
La Joyeuse (cours d'eau)
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
14.42 km² overlap
L'Adour
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
7.68 km² overlap
L'Ardanavy (cours d'eau)
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
6.10 km² overlap
Biotope Protection Order
4.09 km² overlap
6 more protected areassorted by overlap area
Massif du Baygoura
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
2.50 km² overlap
Land acquired by a regional conservatory of natural areas
0.07 km² overlap
Le Saison (cours d'eau)
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.06 km² overlap
La Nive
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.05 km² overlap
Zones humides associées au marais d'Orx
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.01 km² overlap
Le Gave d'Oloron (cours d'eau) et marais de Labastide-Villefranche
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
4 089 distinct species · 213 542 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 Bidouze : 27 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 114 interactions GloBI sur 6 types (connectance 13.2%, filtre Serrano α=0.2). 15 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°
13,0°C
Annual rain
1 185mm
Moisture idx (CMI)
0,22
Runoff
907mm/an
PET
921mm
AET
755mm
Mean slope
7,3°
Water table
268cm
Forest
27%
Crops
9%
Urban
2%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)