HydroBASINS lev08 watershed · #2080642980
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 2 administrative regions : Madrid, Toledo
Sub-basin area
161,6km²
Upstream area
11 531,8km²
Discharge
43,88m³/s
Mean elev.
573m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Río Tajuña2622 km²
- Bassin de Río Jarama168 km²
2 dept-equivalent regions (GADM L2)
- 118.2 km²73.1% of basin
- 43.6 km²26.9% of basin
4 intersecting protected areas
Vegas, cuestas y páramos del sureste de Madrid
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
37.09 km² overlap
Cortados y cantiles de los ríos Jarama y Manzanares
IUCN Not ReportedSpecial Protection Area (Birds Directive)
35.80 km² overlap
Regional Park
35.07 km² overlap
Carrizales y sotos del Jarama y Tajo
IUCN Not ReportedSpecial Protection Area (Birds Directive)
5.26 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 223 distinct species · 29 398 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 Jarama : 28 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 84 interactions GloBI sur 5 types (connectance 10.8%, 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°
14,4°C
Annual rain
420mm
Moisture idx (CMI)
-0,63
Runoff
80mm/an
PET
1 142mm
AET
359mm
Mean slope
2,1°
Water table
239cm
Forest
0%
Crops
49%
Urban
42%
Protected
22%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)