HydroBASINS lev08 watershed · #7080838950
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 14 administrative regions : Acolman, Atenco, Axapusco, Calpulalpan, Chiautla +9
Sub-basin area
542km²
Upstream area
542,1km²
Discharge
0,17m³/s
Mean elev.
2 437m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
14 dept-equivalent regions (GADM L2)
- 129.8 km²24.0% of basin
- 105.6 km²19.5% of basin
- 76.1 km²14.1% of basin
- 68.5 km²12.7% of basin
- 61.1 km²11.3% of basin
- 39.6 km²7.3% of basin
- 28.8 km²5.3% of basin
- 17.1 km²3.2% of basin
6 moreFull L2 list
- Tezoyuca6.7 km² · 1.2%
- Tecámac6.1 km² · 1.1%
- Emiliano Zapata0.6 km² · 0.1%
- Temascalapa0.2 km² · 0.0%
- Calpulalpan0.1 km² · 0.0%
- Chiautla0.0 km² · 0.0%
5 intersecting protected areas
Lago de Texcoco
IUCN VINatural Resources Protection Area
22.76 km² overlap
Cerro Gordo
IUCN Not ReportedState Park
20.11 km² overlap
Lago de Texcoco
IUCN VIWetland of International Importance (Ramsar Site)
12.96 km² overlap
Sierra Patlachique
IUCN Not ReportedState Park
12.31 km² overlap
La Cañada
IUCN Not ReportedEcological Reserve
0.05 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 909 distinct species · 36 356 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 38 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 : 24 espèces reliées par 87 interactions GloBI sur 4 types (connectance 11.7%, filtre Serrano α=0.2). 15 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°
14,4°C
Annual rain
614mm
Moisture idx (CMI)
-0,61
Runoff
16mm/an
PET
1 573mm
AET
519mm
Mean slope
3,8°
Water table
380cm
Forest
73%
Crops
52%
Urban
29%
Protected
6%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)