HydroBASINS lev08 watershed · #7080882830
Bassin de Río San Juan
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 across 2 countries : Los Chiles, San Carlos
Sub-basin area
945,7km²
Upstream area
30 780,8km²
Discharge
407,35m³/s
Mean elev.
65m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Río San Juan2 km²
- Bassin de Río Frío1 km²
2 dept-equivalent regions (GADM L2)
- 573.9 km²60.9% of basin
- Los ChilesAlajuela · Costa Rica368.0 km²39.1% of basin
5 intersecting protected areas
Reserva de Biosfera Río San Juan Nicaragua
IUCN Not ApplicableUNESCO-MAB Biosphere Reserve
574.14 km² overlap
Agua y Paz
IUCN Not ApplicableUNESCO-MAB Biosphere Reserve
369.92 km² overlap
Corredor Fronterizo
IUCN VINational Wildlife Refuge
52.69 km² overlap
Wetland of International Importance (Ramsar Site)
45.09 km² overlap
Los Guatuzos
IUCN IVWildlife Refuge
45.09 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 131 distinct species · 88 415 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 San Juan : 18 espèces reliées par 30 interactions GloBI sur 2 types (connectance 8.5%, filtre Serrano α=0.2). 9 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°
25,8°C
Annual rain
2 457mm
Moisture idx (CMI)
0,35
Runoff
1 047mm/an
PET
1 587mm
AET
1 378mm
Mean slope
1,9°
Water table
69cm
Forest
73%
Crops
11%
Urban
1%
Protected
67%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)