HydroBASINS lev08 watershed · #2080020240
Bassin de Oria ibaia
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 3 administrative regions : Guipúzcoa, Navarra, Álava
Sub-basin area
886,1km²
Upstream area
886,2km²
Discharge
26,57m³/s
Mean elev.
463m
Administrative coverage
3 dept-equivalent regions (GADM L2)
- 754.4 km²85.0% of basin
- 132.7 km²15.0% of basin
- 0.3 km²0.0% of basin
21 intersecting protected areas
Aralar
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
108.91 km² overlap
Aralar
IUCN VNatural Park
108.67 km² overlap
Sierra de Aralar
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
20.55 km² overlap
Aizkorri-Aratz
IUCN VNatural Park
17.40 km² overlap
Aizkorri-Aratz
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
17.36 km² overlap
Hernio-Gazume
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
14.24 km² overlap
Belate
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
3.86 km² overlap
Pagoeta
IUCN VNatural Park
3.72 km² overlap
Pagoeta
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
3.68 km² overlap
12 more protected areassorted by overlap area
Oriako itsasadarra / Ría del Oria
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.90 km² overlap
Oria Garaia / Alto Oria
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.52 km² overlap
Leitzaran ibaia / Río Leitzaran
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.92 km² overlap
Leizaran
IUCN IVNature Reserve
0.69 km² overlap
Araxes ibaia / Río Araxes
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.64 km² overlap
Encinares de Betelu
IUCN IVNature enclave
0.52 km² overlap
Iñurritza
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.06 km² overlap
Tejo de Pagoeta
IUCN IIINatural Monument
0.00 km² overlap
Abeto Douglas de Albiztur
IUCN IIINatural Monument
0.00 km² overlap
Haya de Altzo
IUCN IIINatural Monument
0.00 km² overlap
Abetos de Leitzalarrea
IUCN IIINatural Monument
0.00 km² overlap
Majuelo de Leitza
IUCN IIINatural Monument
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
6 237 distinct species · 160 629 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 36 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 Oria ibaia : 26 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 96 interactions GloBI sur 6 types (connectance 14.4%, filtre Serrano α=0.2). 11 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°
12,3°C
Annual rain
1 189mm
Moisture idx (CMI)
0,25
Runoff
953mm/an
PET
890mm
AET
740mm
Mean slope
16,1°
Water table
498cm
Forest
94%
Crops
4%
Urban
9%
Protected
15%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)