HydroBASINS lev08 watershed · #6080105420
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 16 administrative regions : Andes, Betania, Ciudad Bolívar, Concordia, El Carmen de Atrato +11
Sub-basin area
1 460,9km²
Upstream area
1 461,1km²
Discharge
96,99m³/s
Mean elev.
1 898m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
16 dept-equivalent regions (GADM L2)
- 401.7 km²27.6% of basin
- 287.7 km²19.8% of basin
- 264.7 km²18.2% of basin
- 198.1 km²13.6% of basin
- 169.8 km²11.7% of basin
- 55.8 km²3.8% of basin
- 25.5 km²1.8% of basin
- 25.0 km²1.7% of basin
22 intersecting protected areas
Cuenca Hidrográfica Del Río San Juan
IUCN Not ApplicableWatershed
835.37 km² overlap
Farallones del Citará
IUCN VIRegional Protective Forest Reserves
287.29 km² overlap
Cuchilla Jardin Tamesis
IUCN VIIntegrated Management Regional Districts
139.77 km² overlap
Integrated Management Regional Districts
46.91 km² overlap
Rios Barroso y San Juan
IUCN VIIntegrated Management Regional Districts
30.34 km² overlap
Cuenca Alta del Río Atrato
IUCN VIIntegrated Management Regional Districts
20.92 km² overlap
Civil Society Nature Reserve
1.66 km² overlap
Civil Society Nature Reserve
1.28 km² overlap
Reserva Natural El Olinguito
IUCN VICivil Society Nature Reserve
0.97 km² overlap
13 more protected areassorted by overlap area
Civil Society Nature Reserve
0.83 km² overlap
Las Aves Loro Orejiamarillo
IUCN VICivil Society Nature Reserve
0.60 km² overlap
La Nevera
IUCN VICivil Society Nature Reserve
0.54 km² overlap
Civil Society Nature Reserve
0.53 km² overlap
La Cristalina
IUCN VICivil Society Nature Reserve
0.40 km² overlap
Cuchilla Del San Juan
IUCN VIIntegrated Management Regional Districts
0.25 km² overlap
Reserva Natural Verdeagua
IUCN VICivil Society Nature Reserve
0.18 km² overlap
Civil Society Nature Reserve
0.09 km² overlap
Cedro Carmín
IUCN VICivil Society Nature Reserve
0.06 km² overlap
El Orgasmo
IUCN VICivil Society Nature Reserve
0.05 km² overlap
El Crisol
IUCN VICivil Society Nature Reserve
0.03 km² overlap
Cuenca Hidrográfica Directos Río Cauca- Río Amagá- Quebrada Sinifaná- NSS
IUCN Not ApplicableWatershed
0.03 km² overlap
Civil Society Nature Reserve
0.02 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
4 369 distinct species · 297 504 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 21 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 : 16 espèces reliées par 22 interactions GloBI sur 3 types (connectance 10.5%, 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°
18,2°C
Annual rain
2 740mm
Moisture idx (CMI)
0,50
Runoff
2 128mm/an
PET
1 373mm
AET
1 358mm
Mean slope
21,4°
Water table
630cm
Forest
42%
Crops
6%
Urban
2%
Protected
35%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)