HydroBASINS lev08 watershed · #2080682290
Bassin de Ribeira de Grândola
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 4 administrative regions : Alcácer do Sal, Ferreira do Alentejo, Grândola, Santiago do Cacém
Sub-basin area
631,7km²
Upstream area
3 331,4km²
Discharge
22,01m³/s
Mean elev.
118m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Ribeira de Canhestros573 km²
- Bassin de Rio Sado16 km²
4 dept-equivalent regions (GADM L2)
- GrândolaSetúbal · Portugal372.7 km²59.0% of basin
- Santiago do CacémSetúbal · Portugal177.9 km²28.1% of basin
- Ferreira do AlentejoBeja · Portugal78.2 km²12.4% of basin
- Alcácer do SalSetúbal · Portugal3.2 km²0.5% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 376 distinct species · 34 146 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 Ribeira de Grândola : 26 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 95 interactions GloBI sur 5 types (connectance 12.2%, filtre Serrano α=0.2). 14 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
586mm
Moisture idx (CMI)
-0,49
Runoff
224mm/an
PET
1 141mm
AET
495mm
Mean slope
2,2°
Water table
375cm
Forest
55%
Crops
43%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)