HydroBASINS lev08 watershed · #6080787950
Bassin de Río Arias (Río Arenales)
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 4 administrative regions : Capital, Cerrillos, Chicoana, Rosario de Lerma
Sub-basin area
1 236,4km²
Upstream area
1 236,6km²
Discharge
2,9m³/s
Mean elev.
1 667m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
4 dept-equivalent regions (GADM L2)
- 484.6 km²39.3% of basin
- 387.4 km²31.4% of basin
- 342.5 km²27.8% of basin
- 19.4 km²1.6% of basin
2 intersecting protected areas
Finca Las Costas
IUCN VIMultiple Use Nature Reserve
108.03 km² overlap
Bosques Protectores
IUCN VIReserva Pública
12.58 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 771 distinct species · 170 324 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 26 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 Río Arias (Río Arenales) : 21 espèces reliées par 28 interactions GloBI sur 3 types (connectance 8.6%, filtre Serrano α=0.2). 5 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°
15,4°C
Annual rain
545mm
Moisture idx (CMI)
-0,64
Runoff
94mm/an
PET
1 479mm
AET
461mm
Mean slope
9,9°
Water table
531cm
Forest
26%
Crops
12%
Urban
9%
Protected
1%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)