HydroBASINS lev08 watershed · #2080020000
Bassin de Río Saja
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 1 administrative regions : Cantabria
Sub-basin area
1 040,4km²
Upstream area
1 040,4km²
Discharge
19,9m³/s
Mean elev.
560m
Administrative coverage
16 intersecting protected areas
Valles altos del Nansa y Saja y Alto Campoo
IUCN Not AssignedNatura 2000
276.67 km² overlap
Valles altos del Nansa y Saja y Alto Campoo
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
276.67 km² overlap
Saja-Besaya
IUCN VNatural Park
239.00 km² overlap
Sierra del Cordel y cabeceras del Nansa y del Saja
IUCN Not ReportedSpecial Protection Area (Birds Directive)
68.90 km² overlap
Natura 2000
68.90 km² overlap
Río Saja
IUCN Not AssignedNatura 2000
3.21 km² overlap
Río Saja
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
3.21 km² overlap
La Viesca
IUCN VNatural Area of Special Interest
0.79 km² overlap
Sierra del Escudo
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.53 km² overlap
7 more protected areassorted by overlap area
Sierra del Escudo
IUCN Not AssignedNatura 2000
0.53 km² overlap
Embalse del Ebro
IUCN Not AssignedNatura 2000
0.17 km² overlap
Embalse del Ebro
IUCN Not ReportedSpecial Protection Area (Birds Directive)
0.17 km² overlap
Pozo Tremeo
IUCN VNatural Area of Special Interest
0.12 km² overlap
Sequoias del Monte Cabezón
IUCN IIINatural Monument
0.03 km² overlap
Cueva La Rogería
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.02 km² overlap
Cueva La Rogería
IUCN Not AssignedNatura 2000
0.02 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
4 287 distinct species · 150 282 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 28 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 Saja : 21 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 64 interactions GloBI sur 4 types (connectance 15.8%, filtre Serrano α=0.2). 8 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
916mm
Moisture idx (CMI)
0,11
Runoff
717mm/an
PET
810mm
AET
644mm
Mean slope
13,9°
Water table
501cm
Forest
82%
Crops
1%
Urban
8%
Protected
27%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)