HydroBASINS lev08 watershed · #2080637390
Bassin de Rio Alva
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 : Arganil, Covilhã, Gouveia, Góis, Lousã +6
Sub-basin area
717,2km²
Upstream area
717,2km²
Discharge
11,25m³/s
Mean elev.
594m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
11 dept-equivalent regions (GADM L2)
- ArganilCoimbra · Portugal258.0 km²35.9% of basin
- SeiaGuarda · Portugal256.9 km²35.8% of basin
- Oliveira do HospitalCoimbra · Portugal96.2 km²13.4% of basin
- 45.2 km²6.3% of basin
- 40.7 km²5.7% of basin
- Vila Nova de PoiaresCoimbra · Portugal12.2 km²1.7% of basin
- GóisCoimbra · Portugal2.7 km²0.4% of basin
- 2.5 km²0.4% of basin
5 intersecting protected areas
Serra da Estrela
IUCN VNature Park
212.38 km² overlap
Serra da Estrela
IUCN Not ReportedSite of Community Importance (Habitats Directive)
206.01 km² overlap
Estrela Mountain upper Plateau and upper Zêzere River
IUCN Not ReportedWetland of International Importance (Ramsar Site)
19.24 km² overlap
Complexo do Açor
IUCN Not ReportedSite of Community Importance (Habitats Directive)
5.99 km² overlap
Serra do Acor
IUCN VProtected Landscape
3.73 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
3 119 distinct species · 51 316 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 34 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 Alva : 23 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 67 interactions GloBI sur 6 types (connectance 11.9%, filtre Serrano α=0.2). 11 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°
13,5°C
Annual rain
1 187mm
Moisture idx (CMI)
0,12
Runoff
495mm/an
PET
999mm
AET
674mm
Mean slope
13,1°
Water table
511cm
Forest
94%
Crops
6%
Urban
0%
Protected
30%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)