HydroBASINS lev08 watershed · #2080597200
Bassin de Arga
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
2 755,1km²
Upstream area
2 755,3km²
Discharge
57,14m³/s
Mean elev.
612m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
3 dept-equivalent regions (GADM L2)
- 2674.0 km²96.9% of basin
- 63.8 km²2.3% of basin
- 22.0 km²0.8% of basin
30 intersecting protected areas
Sierra de Aralar
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
126.04 km² overlap
Urbasa y Andia
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
109.25 km² overlap
Belate
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
108.32 km² overlap
Protected Landscape
82.42 km² overlap
Yesos de la Ribera Estellesa
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
70.60 km² overlap
Natural Park
42.19 km² overlap
Aizkorri-Aratz
IUCN VNatural Park
37.90 km² overlap
Aizkorri-Aratz
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
37.82 km² overlap
Monte Alduide
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
34.89 km² overlap
21 more protected areassorted by overlap area
Robledales de Ultzama y Basaburua
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
22.76 km² overlap
Peña Izaga
IUCN Not ReportedSpecial Protection Area (Birds Directive)
13.24 km² overlap
Peña Izaga
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
13.24 km² overlap
Entzia
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
8.22 km² overlap
Tramos Bajos del Aragón y del Arga
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
5.66 km² overlap
Concejo de Elía
IUCN VProtected Landscape
5.24 km² overlap
Protected Landscape
2.64 km² overlap
Putxerri
IUCN IVNature Reserve
0.82 km² overlap
Bosque de Orgi
IUCN VINatural Area (recreational)
0.81 km² overlap
Peña de Etxauri
IUCN Not ReportedSpecial Protection Area (Birds Directive)
0.70 km² overlap
Aralar
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.70 km² overlap
Aralar
IUCN VNatural Park
0.64 km² overlap
Laguna del Juncal
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.61 km² overlap
Sotos Gil y Ramal Hondo
IUCN IVNature Reserve
0.53 km² overlap
Pinares de Lerin
IUCN IVNature enclave
0.48 km² overlap
Sotos de la Muga
IUCN IVNature enclave
0.37 km² overlap
Arakil ibaia / Río Arakil
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.30 km² overlap
Nature Reserve
0.27 km² overlap
Laguna del Juncal
IUCN IVNature Reserve
0.10 km² overlap
Soto de Santa Eulalia
IUCN IVNature enclave
0.07 km² overlap
Cueva Basajaun-Etxea de Lanz
IUCN IVNature Reserve
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
9 827 distinct species · 1 010 453 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 37 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 Arga : 31 espèces reliées par 72 interactions GloBI sur 3 types (connectance 10.8%, filtre Serrano α=0.2). 6 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°
11,4°C
Annual rain
973mm
Moisture idx (CMI)
0,02
Runoff
658mm/an
PET
948mm
AET
692mm
Mean slope
8,7°
Water table
330cm
Forest
47%
Crops
34%
Urban
4%
Protected
6%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)