HydroBASINS lev08 watershed · #2080658780
Bassin de Rio Alviela
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 5 administrative regions : Alcanena, Golegã, Porto de Mós, Santarém, Torres Novas
Sub-basin area
298,2km²
Upstream area
298,2km²
Discharge
3,35m³/s
Mean elev.
130m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
5 dept-equivalent regions (GADM L2)
- 144.9 km²48.5% of basin
- AlcanenaSantarém · Portugal84.9 km²28.4% of basin
- Torres NovasSantarém · Portugal33.7 km²11.3% of basin
- Porto de MósLeiria · Portugal30.1 km²10.1% of basin
- GolegãSantarém · Portugal4.8 km²1.6% of basin
3 intersecting protected areas
Nature Park
66.39 km² overlap
Serras d'Aire e Candeeiros
IUCN Not ReportedSite of Community Importance (Habitats Directive)
66.31 km² overlap
Mira Minde Polje and related Springs
IUCN Not ReportedWetland of International Importance (Ramsar Site)
0.24 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 384 distinct species · 32 836 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 28 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 Rio Alviela : 19 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 76 interactions GloBI sur 4 types (connectance 18.7%, filtre Serrano α=0.2). 10 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°
15,9°C
Annual rain
768mm
Moisture idx (CMI)
-0,23
Runoff
355mm/an
PET
1 002mm
AET
599mm
Mean slope
3,6°
Water table
173cm
Forest
44%
Crops
51%
Urban
0%
Protected
22%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)