HydroBASINS lev08 watershed · #2080591180
Bassin de Zadorra
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 4 administrative regions : Burgos, Guipúzcoa, Vizcaya, Álava
Sub-basin area
1 379,7km²
Upstream area
1 380,1km²
Discharge
27,07m³/s
Mean elev.
654m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
4 dept-equivalent regions (GADM L2)
- 1064.5 km²77.0% of basin
- 265.0 km²19.2% of basin
- 43.6 km²3.2% of basin
- 8.9 km²0.6% of basin
25 intersecting protected areas
Gorbeia
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
45.92 km² overlap
Gorbeia
IUCN VNatural Park
43.44 km² overlap
Zadorraren sistemako urtegiak / Embalses del sistema del Zadorra
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
27.19 km² overlap
Gasteizko mendi garaiak / Montes altos de Vitoria
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
22.29 km² overlap
Izki
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
18.95 km² overlap
Izki
IUCN Not ReportedSpecial Protection Area (Birds Directive)
18.95 km² overlap
Aizkorri-Aratz
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
17.01 km² overlap
Aizkorri-Aratz
IUCN VNatural Park
16.75 km² overlap
Izki
IUCN VNatural Park
15.27 km² overlap
16 more protected areassorted by overlap area
Entzia
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
11.63 km² overlap
Aldaiako mendiak / Montes de Aldaia
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
11.21 km² overlap
Urkiola
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
9.78 km² overlap
Urkiola
IUCN VNatural Park
9.78 km² overlap
Riberas del Ayuda
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
5.08 km² overlap
Arabako hegoaldeko mendilerroak / Sierras meridionales de Álava
IUCN Not ReportedSpecial Protection Area (Birds Directive)
4.00 km² overlap
Arabako hegoaldeko mendilerroak / Sierras meridionales de Álava
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
4.00 km² overlap
Zadorra ibaia / Río Zadorra
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
3.32 km² overlap
Special Areas of Conservation (Habitats Directive)
2.46 km² overlap
Salburua
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
2.18 km² overlap
Salburua
IUCN Not ReportedSpecial Protection Area (Birds Directive)
2.18 km² overlap
Riberas del Zadorra
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.76 km² overlap
Barrundia ibaia / Río Barrundia
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.98 km² overlap
Ihuda ibaia / Río Ihuda (Ayuda)
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.67 km² overlap
Roble de Ondategi
IUCN IIINatural Monument
0.00 km² overlap
Sequoia de Vitoria
IUCN IIINatural Monument
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
8 837 distinct species · 413 291 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 Zadorra : 29 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 59 interactions GloBI sur 2 types (connectance 9.4%, filtre Serrano α=0.2). 7 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
883mm
Moisture idx (CMI)
-0,01
Runoff
620mm/an
PET
888mm
AET
665mm
Mean slope
6,3°
Water table
236cm
Forest
62%
Crops
39%
Urban
7%
Protected
6%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)