HydroBASINS lev08 watershed · #2080016960
Bassin de la Tordera
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 2 administrative regions : Barcelona, Girona
Sub-basin area
895,1km²
Upstream area
895,2km²
Discharge
8,26m³/s
Mean elev.
352m
Administrative coverage
2 dept-equivalent regions (GADM L2)
- 542.9 km²60.6% of basin
- 353.4 km²39.4% of basin
20 intersecting protected areas
El Montseny
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
172.69 km² overlap
el Montseny
IUCN VProtection Plan
171.85 km² overlap
Serres del Litoral Septentrional
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
91.69 km² overlap
Protection Plan
91.68 km² overlap
el Montseny
IUCN VNatural Park
89.49 km² overlap
Massís de les Cadiretes
IUCN Not ReportedSpecial Protection Area (Birds Directive)
5.07 km² overlap
Massís de les Cadiretes
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
5.07 km² overlap
Massís de les Cadiretes
IUCN VProtection Plan
5.06 km² overlap
Estany de Sils-Riera de Santa Coloma
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
4.53 km² overlap
11 more protected areassorted by overlap area
Estany de Sils-Riera de Santa Coloma
IUCN Not ReportedSpecial Protection Area (Birds Directive)
4.53 km² overlap
Estany de Sils
IUCN VProtection Plan
3.95 km² overlap
Riu i estanys de Tordera
IUCN VProtection Plan
3.38 km² overlap
Riu i Estanys de Tordera
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
3.38 km² overlap
Turons de Maçanet
IUCN VProtection Plan
1.40 km² overlap
Riera d`Arbúcies
IUCN VProtection Plan
1.00 km² overlap
Guilleries, les
IUCN VProtection Plan
0.94 km² overlap
Les Guilleries
IUCN Not ReportedSpecial Protection Area (Birds Directive)
0.94 km² overlap
Les Guilleries
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.94 km² overlap
Riera d`Arbucies-Hostalric
IUCN IVNature Reserve (Parcial)
0.58 km² overlap
Riera de Santa Coloma
IUCN VProtection Plan
0.57 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
10 418 distinct species · 405 160 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 la Tordera : 25 espèces reliées par 105 interactions GloBI sur 6 types (connectance 16.7%, 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°
14,3°C
Annual rain
793mm
Moisture idx (CMI)
-0,08
Runoff
286mm/an
PET
862mm
AET
646mm
Mean slope
9,5°
Water table
400cm
Forest
89%
Crops
4%
Urban
11%
Protected
28%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)