HydroBASINS lev08 watershed · #2080622440
Bassin de Arroyo Rolloso
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 across 2 countries : Freixo de Espada à Cinta, Salamanca
Sub-basin area
91,8km²
Upstream area
75 055,2km²
Discharge
329,87m³/s
Mean elev.
538m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
2 dept-equivalent regions (GADM L2)
- 78.1 km²84.9% of basin
- Freixo de Espada à CintaBragança · Portugal13.8 km²15.1% of basin
6 intersecting protected areas
Arribes del Duero
IUCN VNatural Park
49.52 km² overlap
Arribes del Duero
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
49.36 km² overlap
Arribes del Duero - ZEPA
IUCN Not ReportedSpecial Protection Area (Birds Directive)
49.36 km² overlap
Douro Internacional
IUCN VNature Park
13.90 km² overlap
Douro Internacional e Vale do Águeda
IUCN Not ReportedSpecial Protection Area (Birds Directive)
13.83 km² overlap
Douro Internacional
IUCN Not ReportedSite of Community Importance (Habitats Directive)
11.42 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
573 distinct species · 2 567 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 Arroyo Rolloso : 32 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 87 interactions GloBI sur 4 types (connectance 11.2%, filtre Serrano α=0.2). 8 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°
13,3°C
Annual rain
732mm
Moisture idx (CMI)
-0,31
Runoff
243mm/an
PET
1 066mm
AET
598mm
Mean slope
7,2°
Water table
401cm
Forest
34%
Crops
18%
Urban
0%
Protected
69%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)