HydroBASINS lev08 watershed · #2080596740
Bassin de Ega
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 : Burgos, Navarra, Álava
Sub-basin area
1 305km²
Upstream area
1 305,1km²
Discharge
22,33m³/s
Mean elev.
642m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
3 dept-equivalent regions (GADM L2)
- 921.6 km²70.5% of basin
- 371.2 km²28.4% of basin
- 14.3 km²1.1% of basin
27 intersecting protected areas
Sierra de Lokiz
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
131.55 km² overlap
Izki
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
75.94 km² overlap
Izki
IUCN Not ReportedSpecial Protection Area (Birds Directive)
75.94 km² overlap
Izki
IUCN VNatural Park
74.96 km² overlap
Arabako hegoaldeko mendilerroak / Sierras meridionales de Álava
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
69.76 km² overlap
Arabako hegoaldeko mendilerroak / Sierras meridionales de Álava
IUCN Not ReportedSpecial Protection Area (Birds Directive)
69.76 km² overlap
Yesos de la Ribera Estellesa
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
63.07 km² overlap
Entzia
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
62.77 km² overlap
Sierra de Codés
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
27.86 km² overlap
18 more protected areassorted by overlap area
Urbasa y Andia
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
21.80 km² overlap
Natural Park
21.48 km² overlap
Ríos Ega-Urederra
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
5.32 km² overlap
Ega-Berron ibaia / Río Ega-Berron
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
2.26 km² overlap
Nacedero del Urederra
IUCN IVNature Reserve
1.11 km² overlap
Basaura
IUCN IVNature Reserve
0.84 km² overlap
Pinares de Lerin
IUCN IVNature enclave
0.49 km² overlap
Peñalabeja
IUCN IVNature Reserve
0.23 km² overlap
Barranco de Lasia
IUCN IVNature Reserve
0.22 km² overlap
Quejigos de Learza
IUCN IIINatural Monument
0.00 km² overlap
Tilo de Antoñana
IUCN IIINatural Monument
0.00 km² overlap
Tejo de Antoñana
IUCN IIINatural Monument
0.00 km² overlap
Fresno de Santa Teodosia (Arana)
IUCN IIINatural Monument
0.00 km² overlap
Encino de las Tres Patas
IUCN IIINatural Monument
0.00 km² overlap
Roble el Centinela
IUCN IIINatural Monument
0.00 km² overlap
Encina de Basaura
IUCN IIINatural Monument
0.00 km² overlap
Encina de Erául
IUCN IIINatural Monument
0.00 km² overlap
Enebro de Legardeta
IUCN IIINatural Monument
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
5 508 distinct species · 138 599 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 Ega : 28 espèces reliées par 81 interactions GloBI sur 5 types (connectance 12.2%, filtre Serrano α=0.2). 9 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°
11,6°C
Annual rain
777mm
Moisture idx (CMI)
-0,18
Runoff
541mm/an
PET
957mm
AET
629mm
Mean slope
7,3°
Water table
313cm
Forest
47%
Crops
39%
Urban
1%
Protected
8%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)