HydroBASINS lev08 watershed · #2080018470
Bassin de Ribeira do Alportel
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 11 administrative regions : Albufeira, Castro Marim, Faro, Lagoa, Loulé +6
Sub-basin area
1 730,9km²
Upstream area
1 730,9km²
Discharge
1,19m³/s
Mean elev.
125m
Administrative coverage
11 dept-equivalent regions (GADM L2)
- 484.9 km²28.0% of basin
- 346.8 km²20.0% of basin
- 188.1 km²10.9% of basin
- SilvesFaro · Portugal188.0 km²10.9% of basin
- AlbufeiraFaro · Portugal140.6 km²8.1% of basin
- OlhãoFaro · Portugal125.2 km²7.2% of basin
- São Brás de AlportelFaro · Portugal98.7 km²5.7% of basin
- LagoaFaro · Portugal68.3 km²3.9% of basin
3 moreFull L2 list
- Vila Real de Santo António34.0 km² · 2.0%
- Castro Marim9.2 km² · 0.5%
- Portimão0.1 km² · 0.0%
20 intersecting protected areas
Barrocal
IUCN Not ReportedSite of Community Importance (Habitats Directive)
202.64 km² overlap
Ria Formosa
IUCN VNature Park
175.55 km² overlap
Ria Formosa
IUCN Not ReportedSpecial Protection Area (Birds Directive)
156.55 km² overlap
Ria Formosa / Castro Marim
IUCN Not ReportedSite of Community Importance (Habitats Directive)
140.30 km² overlap
Ria Formosa
IUCN VWetland of International Importance (Ramsar Site)
135.45 km² overlap
Caldeirão
IUCN Not ReportedSpecial Protection Area (Birds Directive)
121.98 km² overlap
Caldeirão
IUCN Not ReportedSite of Community Importance (Habitats Directive)
121.98 km² overlap
Rocha da Pena
IUCN IIILocal Protected Landscape
6.72 km² overlap
Ribeira do Vascão
IUCN Not ReportedWetland of International Importance (Ramsar Site)
6.56 km² overlap
11 more protected areassorted by overlap area
Ribeira de Quarteira
IUCN Not ReportedSite of Community Importance (Habitats Directive)
5.79 km² overlap
Cerro da Cabeça
IUCN Not ReportedSite of Community Importance (Habitats Directive)
5.72 km² overlap
Marine Park
4.76 km² overlap
Fonte Benemola
IUCN IIILocal Protected Landscape
4.06 km² overlap
Costa Sudoeste
IUCN Not ReportedSite of Community Importance (Habitats Directive)
1.37 km² overlap
Foz do Almargem e do Trafal
IUCN IVLocal Nature Reserve
1.35 km² overlap
Sapais de Castro Marim
IUCN IVWetland of International Importance (Ramsar Site)
0.25 km² overlap
Nature Reserve
0.03 km² overlap
Río Guadiana y Ribera de Chanza
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.01 km² overlap
Leixão da Gaivota
IUCN Not ReportedSpecial Protection Area (Birds Directive)
0.00 km² overlap
Natura 2000
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
7 803 distinct species · 1 274 611 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 do Alportel : 27 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 58 interactions GloBI sur 3 types (connectance 9.2%, 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°
16,7°C
Annual rain
526mm
Moisture idx (CMI)
-0,52
Runoff
288mm/an
PET
1 107mm
AET
446mm
Mean slope
4,1°
Water table
276cm
Forest
23%
Crops
39%
Urban
6%
Protected
11%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)