HydroBASINS lev08 watershed · #7080833350
Bassin de Río Lerma
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 3 administrative regions : Cortazar, Jaral del Progreso, Salvatierra
Sub-basin area
207,7km²
Upstream area
10 253,5km²
Discharge
45,97m³/s
Mean elev.
1 870m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Río Lerma869 km²
- Bassin de Arroyo Grande757 km²
3 dept-equivalent regions (GADM L2)
- SalvatierraGuanajuato · México165.7 km²80.0% of basin
- 23.3 km²11.2% of basin
- Jaral del ProgresoGuanajuato · México18.1 km²8.8% of basin
1 intersecting protected areas
Cerros El Culiacán y La Gavia
IUCN Not ReportedSustainable Use Area
118.02 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
433 distinct species · 1 294 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 52 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 Lerma : 35 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 122 interactions GloBI sur 5 types (connectance 8.9%, filtre Serrano α=0.2). 18 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°
18,1°C
Annual rain
728mm
Moisture idx (CMI)
-0,56
Runoff
54mm/an
PET
1 657mm
AET
615mm
Mean slope
3,7°
Water table
360cm
Forest
97%
Crops
60%
Urban
8%
Protected
58%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)