HydroBASINS lev08 watershed · #2080600740
Bassin de Río Arlanzón
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 : Burgos, Palencia
Sub-basin area
2 605,9km²
Upstream area
2 605,9km²
Discharge
20,37m³/s
Mean elev.
961m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
2 dept-equivalent regions (GADM L2)
- 2588.5 km²99.2% of basin
- 21.6 km²0.8% of basin
11 intersecting protected areas
Sierra de la Demanda
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
138.82 km² overlap
Sierra de la Demanda - ZEPA
IUCN Not ReportedSpecial Protection Area (Birds Directive)
117.44 km² overlap
Humada - Peña Amaya - ZEPA
IUCN Not ReportedSpecial Protection Area (Birds Directive)
49.76 km² overlap
Humada-Peña Amaya
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
44.58 km² overlap
Riberas del Río Arlanzón y afluentes
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
11.19 km² overlap
Montes Torozos y Páramos de Torquemada-Astudillo
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.76 km² overlap
Natural Park
0.48 km² overlap
Hoces del Alto Ebro y Rudrón
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.40 km² overlap
Hoces del Alto Ebro y Rudrón - ZEPA
IUCN Not ReportedSpecial Protection Area (Birds Directive)
0.15 km² overlap
2 more protected areassorted by overlap area
Riberas del Río Arlanza y afluentes
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.03 km² overlap
Riberas del Río Oca y afluentes
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
4 524 distinct species · 421 585 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 23 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 Río Arlanzón : 12 espèces reliées par 50 interactions GloBI sur 3 types (connectance 19.8%, 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°
10,1°C
Annual rain
606mm
Moisture idx (CMI)
-0,34
Runoff
266mm/an
PET
925mm
AET
513mm
Mean slope
4,3°
Water table
266cm
Forest
22%
Crops
51%
Urban
3%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)