HydroBASINS lev08 watershed · #2080020130
Bassin de Butroe
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 : Guipúzcoa, Vizcaya
Sub-basin area
780,8km²
Upstream area
780,8km²
Discharge
1,1m³/s
Mean elev.
184m
Administrative coverage
2 dept-equivalent regions (GADM L2)
- 728.6 km²93.2% of basin
- 27.3 km²3.5% of basin
16 intersecting protected areas
Urdaibai
IUCN IVBiosphere Reserve
218.92 km² overlap
Urdaibaiko itsasadarra / Ría de Urdaibai
IUCN Not ReportedSpecial Protection Area (Birds Directive)
25.47 km² overlap
Urdaibaiko artadi kantauriarrak / Encinares cantábricos de Urdaibai
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
15.84 km² overlap
Urdaibaiko ibai sarea / Red fluvial de Urdaibai
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
13.21 km² overlap
Ria de Mundaka-Guernika
IUCN Not ReportedWetland of International Importance (Ramsar Site)
9.46 km² overlap
Special Areas of Conservation (Habitats Directive)
9.37 km² overlap
Espacio marino de la Ría de Mundaka-Cabo de Ogoño
IUCN Not ReportedSpecial Protection Area (Birds Directive)
9.23 km² overlap
Espacio marino de la Ria de Mundaka-Cabo de Ogoño
IUCN Not ReportedMarine Protected Area (OSPAR)
9.21 km² overlap
Arno
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
5.28 km² overlap
7 more protected areassorted by overlap area
Artibai ibaia / Río Artibai
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.39 km² overlap
Gaztelugatxe
IUCN IIINatural Monument
1.33 km² overlap
Gaztelugatxeko Doniene / San Juan de Gaztelugatxe
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.33 km² overlap
Lea ibaia / Río Lea
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.10 km² overlap
Astondoko haremunak / Dunas de Astondo
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.05 km² overlap
Protected Landscape
0.02 km² overlap
Encina de Muxika
IUCN IIINatural Monument
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
4 185 distinct species · 328 277 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 31 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 Butroe : 23 espèces dont 3 patrimoniales (LR IUCN CR/EN/VU) reliées par 70 interactions GloBI sur 3 types (connectance 14.1%, 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°
13,5°C
Annual rain
1 241mm
Moisture idx (CMI)
0,36
Runoff
818mm/an
PET
792mm
AET
693mm
Mean slope
11,6°
Water table
374cm
Forest
96%
Crops
1%
Urban
12%
Protected
28%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)