HydroBASINS lev08 watershed · #2080642600
Bassin de Arroyo de San Julián
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 : Cáceres, Toledo
Sub-basin area
390,3km²
Upstream area
390,3km²
Discharge
3,56m³/s
Mean elev.
345m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
2 dept-equivalent regions (GADM L2)
- 352.5 km²90.2% of basin
- 38.2 km²9.8% of basin
6 intersecting protected areas
Sierra de San Vicente y valles del Tiétar y Alberche
IUCN Not ReportedSpecial Protection Area (Birds Directive)
233.52 km² overlap
Sierra de San Vicente y valles del Tiétar y Alberche
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
233.52 km² overlap
Llanuras de Oropesa, Lagartera y Calera y Chozas
IUCN Not ReportedSpecial Protection Area (Birds Directive)
11.90 km² overlap
Llanuras de Oropesa, Lagartera y Calera y Chozas
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
11.90 km² overlap
Río y Pinares del Tietar
IUCN Not ReportedSpecial Protection Area (Birds Directive)
5.23 km² overlap
Río Tietar
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.99 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 244 distinct species · 25 763 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 34 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 Arroyo de San Julián : 29 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 61 interactions GloBI sur 3 types (connectance 10.9%, filtre Serrano α=0.2). 5 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°
15,6°C
Annual rain
364mm
Moisture idx (CMI)
-0,70
Runoff
243mm/an
PET
1 214mm
AET
312mm
Mean slope
1,1°
Water table
318cm
Forest
14%
Crops
17%
Urban
1%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)