HydroBASINS lev08 watershed · #2080608210
Bassin de Río Riaza
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, Guadalajara, Segovia, Soria
Sub-basin area
1 101,3km²
Upstream area
1 101,5km²
Discharge
3,15m³/s
Mean elev.
1 066m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
4 dept-equivalent regions (GADM L2)
- 875.9 km²79.4% of basin
- 200.3 km²18.2% of basin
- 16.3 km²1.5% of basin
- 10.3 km²0.9% of basin
10 intersecting protected areas
Sierra de Ayllón
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
113.55 km² overlap
Hoces del Río Riaza - ZEPA
IUCN Not ReportedSpecial Protection Area (Birds Directive)
65.48 km² overlap
Hoces del Río Riaza
IUCN IINatural Park
51.85 km² overlap
Hoces del Río Riaza
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
51.85 km² overlap
Sierra de Pela
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
12.56 km² overlap
Sierra Norte de Guadalajara
IUCN VINatural Park
2.56 km² overlap
Sierra de Ayllón
IUCN Not ReportedSpecial Protection Area (Birds Directive)
2.55 km² overlap
Sierra de Ayllón
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
2.55 km² overlap
Riberas del Río Riaza
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.86 km² overlap
1 more protected areassorted by overlap area
Ancient and Primeval Beech Forests of the Carpathians and Other Regions of Europe
IUCN Not ApplicableWorld Heritage Site (natural or mixed)
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 999 distinct species · 81 836 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 33 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 Riaza : 23 espèces reliées par 81 interactions GloBI sur 4 types (connectance 15.3%, filtre Serrano α=0.2). 10 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°
10,5°C
Annual rain
509mm
Moisture idx (CMI)
-0,48
Runoff
98mm/an
PET
979mm
AET
436mm
Mean slope
4,3°
Water table
431cm
Forest
25%
Crops
50%
Urban
0%
Protected
5%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)