HydroBASINS lev08 watershed · #2080663970
Bassin de Ribeira de Seda
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 8 administrative regions : Alter do Chão, Avis, Castelo de Vide, Crato, Fronteira +3
Sub-basin area
1 003km²
Upstream area
1 003km²
Discharge
7,65m³/s
Mean elev.
255m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
8 dept-equivalent regions (GADM L2)
- Alter do ChãoPortalegre · Portugal353.3 km²35.2% of basin
- 277.4 km²27.6% of basin
- PortalegrePortalegre · Portugal177.9 km²17.7% of basin
- AvisPortalegre · Portugal132.7 km²13.2% of basin
- FronteiraPortalegre · Portugal37.5 km²3.7% of basin
- MonfortePortalegre · Portugal14.2 km²1.4% of basin
- Ponte de SôrPortalegre · Portugal8.2 km²0.8% of basin
- Castelo de VidePortalegre · Portugal2.7 km²0.3% of basin
3 intersecting protected areas
Cabeção
IUCN Not ReportedSite of Community Importance (Habitats Directive)
36.13 km² overlap
Serra de Sao Mamede
IUCN VNature Park
7.08 km² overlap
S. Mamede
IUCN Not ReportedSite of Community Importance (Habitats Directive)
1.32 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 878 distinct species · 77 898 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 36 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 Ribeira de Seda : 28 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 79 interactions GloBI sur 4 types (connectance 11.9%, filtre Serrano α=0.2). 9 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°
16,4°C
Annual rain
717mm
Moisture idx (CMI)
-0,37
Runoff
238mm/an
PET
1 146mm
AET
598mm
Mean slope
2,3°
Water table
247cm
Forest
45%
Crops
33%
Urban
1%
Protected
1%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)