HydroBASINS lev08 watershed · #7080001420
Bassin de Río Virilla
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 39 administrative regions : Acosta, Alajuela, Alajuelita, Aserrí, Atenas +34
Sub-basin area
2 145,2km²
Upstream area
2 145,2km²
Discharge
102,55m³/s
Mean elev.
1 047m
Administrative coverage
39 dept-equivalent regions (GADM L2)
- AlajuelaAlajuela · Costa Rica265.5 km²12.4% of basin
- TurrubaresSan José · Costa Rica230.8 km²10.8% of basin
- GreciaAlajuela · Costa Rica141.9 km²6.6% of basin
- AtenasAlajuela · Costa Rica126.3 km²5.9% of basin
- PuriscalSan José · Costa Rica116.8 km²5.5% of basin
- MoraSan José · Costa Rica110.1 km²5.2% of basin
- NaranjoAlajuela · Costa Rica105.4 km²4.9% of basin
- PoásAlajuela · Costa Rica73.2 km²3.4% of basin
31 moreFull L2 list
- Garabito67.5 km² · 3.2%
- Santa Ana60.8 km² · 2.8%
- Barva55.6 km² · 2.6%
- Desamparados53.8 km² · 2.5%
- Vázquez de Coronado50.5 km² · 2.4%
- Santa Bárbara49.7 km² · 2.3%
- Sarchí47.4 km² · 2.2%
- San Rafael46.9 km² · 2.2%
- Orotina46.5 km² · 2.2%
- San Ramón45.4 km² · 2.1%
- San José44.7 km² · 2.1%
- La Unión44.1 km² · 2.1%
- Palmares38.5 km² · 1.8%
- Escazú34.5 km² · 1.6%
- Goicoechea31.5 km² · 1.5%
- Aserrí28.9 km² · 1.4%
- San Isidro26.4 km² · 1.2%
- Heredia26.2 km² · 1.2%
- Santo Domingo25.3 km² · 1.2%
- Cartago24.6 km² · 1.2%
- Moravia24.5 km² · 1.1%
- Alajuelita21.2 km² · 1.0%
- Curridabat16.1 km² · 0.8%
- Montes de Oca15.6 km² · 0.7%
- Belén12.4 km² · 0.6%
- Tibás8.4 km² · 0.4%
- San Pablo8.2 km² · 0.4%
- Flores6.8 km² · 0.3%
- San Mateo3.9 km² · 0.2%
- Zarcero0.6 km² · 0.0%
- Acosta0.0 km² · 0.0%
19 intersecting protected areas
Cordillera Volcánica Central
IUCN Not ApplicableUNESCO-MAB Biosphere Reserve
1713.56 km² overlap
Carara
IUCN IINational Park
50.22 km² overlap
Cerro de Escazu
IUCN IVProtected Zone
43.66 km² overlap
Cerros de Turrubares
IUCN IVProtected Zone
29.04 km² overlap
Grecia
IUCN VIForest Reserve
23.34 km² overlap
Cordillera Volcanica Central
IUCN VIForest Reserve
21.19 km² overlap
El Rodeo
IUCN IVProtected Zone
21.02 km² overlap
Braulio Carrillo
IUCN IINational Park
18.87 km² overlap
Cerros de La Carpintera
IUCN IVProtected Zone
15.31 km² overlap
10 more protected areassorted by overlap area
Rio Grande
IUCN IVProtected Zone
15.00 km² overlap
Fernando Castro Cervantes
IUCN VINational Wildlife Refuge
14.17 km² overlap
Rio Toro
IUCN IVProtected Zone
11.90 km² overlap
Volcan Poas
IUCN IINational Park
9.97 km² overlap
Cerro Atenas
IUCN IVProtected Zone
9.00 km² overlap
Rio Tiribi
IUCN IVProtected Zone
7.02 km² overlap
El Chayote
IUCN IVProtected Zone
3.20 km² overlap
Quitirrisi
IUCN IVProtected Zone
1.12 km² overlap
Cerro El Chompipe
IUCN IVProtected Zone
0.87 km² overlap
Volcan Irazu
IUCN IINational Park
0.06 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
18 051 distinct species · 3 735 959 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 Virilla : 18 espèces reliées par 25 interactions GloBI sur 2 types (connectance 7.7%, filtre Serrano α=0.2). 8 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°
21,3°C
Annual rain
2 422mm
Moisture idx (CMI)
0,36
Runoff
1 917mm/an
PET
1 507mm
AET
1 210mm
Mean slope
8,8°
Water table
219cm
Forest
79%
Crops
6%
Urban
42%
Protected
14%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)