HydroBASINS lev08 watershed · #2080604220
Bassin de Riera de Merlès
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
177,5km²
Upstream area
177,5km²
Discharge
1,88m³/s
Mean elev.
796m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
2 dept-equivalent regions (GADM L2)
- 140.0 km²78.7% of basin
- 37.8 km²21.3% of basin
11 intersecting protected areas
Riera de Merlès
IUCN Not ReportedSpecial Protection Area (Birds Directive)
10.38 km² overlap
Riera de Merlès
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
10.38 km² overlap
Riera de Merlès
IUCN VProtection Plan
10.38 km² overlap
Serra de Picancel
IUCN VProtection Plan
1.79 km² overlap
Riera de Merlés
IUCN IVNature Reserve (Parcial)
0.70 km² overlap
Rasos de Tubau
IUCN VProtection Plan
0.53 km² overlap
Rasos de Tubau
IUCN Not ReportedSpecial Protection Area (Birds Directive)
0.53 km² overlap
Rasos de Tubau
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.53 km² overlap
Serra del Catllaràs
IUCN VProtection Plan
0.21 km² overlap
2 more protected areassorted by overlap area
Serra de Catllaràs
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.21 km² overlap
Serra de Catllaràs
IUCN Not ReportedSpecial Protection Area (Birds Directive)
0.21 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
5 608 distinct species · 76 462 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 46 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 Riera de Merlès : 16 espèces reliées par 269 interactions GloBI sur 7 types (connectance 15.2%, filtre Serrano α=0.2). 44 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°
11,6°C
Annual rain
783mm
Moisture idx (CMI)
-0,07
Runoff
311mm/an
PET
840mm
AET
643mm
Mean slope
10,4°
Water table
438cm
Forest
97%
Crops
4%
Urban
0%
Protected
7%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)