HydroBASINS lev08 watershed · #2080623240
Bassin de Río Lozoya
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 : Madrid, Segovia
Sub-basin area
494,6km²
Upstream area
494,6km²
Discharge
2,42m³/s
Mean elev.
1 400m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
2 dept-equivalent regions (GADM L2)
- 491.9 km²99.3% of basin
- 3.3 km²0.7% of basin
9 intersecting protected areas
Cuenca del río Lozoya y Sierra Norte
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
265.38 km² overlap
Sierra de Guadarrama
IUCN IINacional Park
110.88 km² overlap
Alto Lozoya
IUCN Not ReportedSpecial Protection Area (Birds Directive)
77.17 km² overlap
Humedales del Macizo de Peñalara
IUCN Not ReportedWetland of International Importance (Ramsar Site)
4.70 km² overlap
Sierra de Guadarrama - ZEPA
IUCN Not ReportedSpecial Protection Area (Birds Directive)
3.81 km² overlap
Sierra de Guadarrama
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
3.81 km² overlap
Cuenca del río Manzanares
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.85 km² overlap
Regional Park
0.40 km² overlap
Natural Park
0.02 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
5 190 distinct species · 162 305 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 40 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 Lozoya : 28 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 104 interactions GloBI sur 6 types (connectance 13.3%, filtre Serrano α=0.2). 12 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°
9,1°C
Annual rain
576mm
Moisture idx (CMI)
-0,38
Runoff
150mm/an
PET
935mm
AET
489mm
Mean slope
10,7°
Water table
619cm
Forest
70%
Crops
10%
Urban
0%
Protected
22%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)