HydroBASINS lev08 watershed · #2080626320
Bassin de Río Jarama
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 3 administrative regions : Guadalajara, Madrid, Segovia
Sub-basin area
632,7km²
Upstream area
632,7km²
Discharge
2,47m³/s
Mean elev.
1 215m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
3 dept-equivalent regions (GADM L2)
- 606.7 km²95.8% of basin
- 26.8 km²4.2% of basin
- 0.1 km²0.0% of basin
11 intersecting protected areas
Sierra Norte de Guadalajara
IUCN VINatural Park
470.97 km² overlap
Sierra de Ayllón
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
417.69 km² overlap
Sierra de Ayllón
IUCN Not ReportedSpecial Protection Area (Birds Directive)
417.69 km² overlap
Cuenca del río Lozoya y Sierra Norte
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
25.38 km² overlap
Rañas de Matarrubia, Villaseca y Casa de Uceda
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
12.64 km² overlap
Site of national interest
2.52 km² overlap
Lagunas de Puebla de Beleña
IUCN IbNature Reserve
0.86 km² overlap
Lagunas de Puebla de Beleña
IUCN Not ReportedSpecial Protection Area (Birds Directive)
0.84 km² overlap
Lagunas de Puebla de Beleña
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.84 km² overlap
2 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)
0.72 km² overlap
Sierra de Ayllón
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.05 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
3 437 distinct species · 64 657 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 41 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 Jarama : 28 espèces reliées par 102 interactions GloBI sur 5 types (connectance 12.4%, filtre Serrano α=0.2). 13 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°
10,0°C
Annual rain
541mm
Moisture idx (CMI)
-0,44
Runoff
123mm/an
PET
968mm
AET
461mm
Mean slope
12,0°
Water table
691cm
Forest
73%
Crops
7%
Urban
0%
Protected
75%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)