HydroBASINS lev08 watershed · #7080851590
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 5 administrative regions : Acayucan, Hueyapan de Ocampo, Isla, Juan Rodríguez Clara, San Juan Evangelista
Sub-basin area
1 152,7km²
Upstream area
7 444km²
Discharge
373,11m³/s
Mean elev.
74m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin · #7080853880452 km²
- Bassin de Río San Juan336 km²
5 dept-equivalent regions (GADM L2)
- Juan Rodríguez ClaraVeracruz · México641.4 km²55.8% of basin
- 283.8 km²24.7% of basin
- Hueyapan de OcampoVeracruz · México173.0 km²15.1% of basin
- San Juan EvangelistaVeracruz · México43.2 km²3.8% of basin
- 7.7 km²0.7% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
734 distinct species · 2 277 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 39 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 : 32 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 48 interactions GloBI sur 3 types (connectance 5.9%, 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°
25,5°C
Annual rain
1 358mm
Moisture idx (CMI)
-0,18
Runoff
1 493mm/an
PET
1 654mm
AET
1 070mm
Mean slope
1,4°
Water table
92cm
Forest
12%
Crops
44%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)