HydroBASINS lev08 watershed · #2080654920
Bassin de Rio Tejo
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 : Abrantes, Constância, Gavião, Mação, Nisa +3
Sub-basin area
1 140,5km²
Upstream area
61 841,4km²
Discharge
319,8m³/s
Mean elev.
192m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Rio Alburrel1568 km²
- Bassin de Rio Ocreza1430 km²
8 dept-equivalent regions (GADM L2)
- 556.0 km²48.7% of basin
- MaçãoSantarém · Portugal242.9 km²21.3% of basin
- GaviãoPortalegre · Portugal145.5 km²12.7% of basin
- SardoalSantarém · Portugal74.8 km²6.6% of basin
- 62.0 km²5.4% of basin
- ConstânciaSantarém · Portugal57.1 km²5.0% of basin
- Ponte de SôrPortalegre · Portugal2.3 km²0.2% of basin
- Vila Velha de RódãoCastelo Branco · Portugal0.8 km²0.1% of basin
1 intersecting protected areas
Nisa / Lage da Prata
IUCN Not ReportedSite of Community Importance (Habitats Directive)
0.47 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 798 distinct species · 141 406 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 32 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 Tejo : 22 espèces reliées par 81 interactions GloBI sur 5 types (connectance 16.3%, 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°
16,3°C
Annual rain
788mm
Moisture idx (CMI)
-0,29
Runoff
255mm/an
PET
1 108mm
AET
623mm
Mean slope
4,8°
Water table
308cm
Forest
64%
Crops
7%
Urban
2%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)