HydroBASINS lev08 watershed · #7080006390
Bassin de Río Grande de Santiago
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 7 administrative regions : Del Nayar, Ruíz, San Blas, Santa María del Oro, Santiago Ixcuintla +2
Sub-basin area
2 394,4km²
Upstream area
122 677,3km²
Discharge
301,42m³/s
Mean elev.
530m
Administrative coverage
Hydrographic chain
▼ Drains into
Outlet (drains to ocean / endorheic)
▲ Receives from 2 basins
- Bassin de Río Grande de Santiago1221 km²
- Bassin de Rio Huazamota490 km²
7 dept-equivalent regions (GADM L2)
- 949.3 km²39.8% of basin
- 632.5 km²26.5% of basin
- 404.5 km²16.9% of basin
- 137.8 km²5.8% of basin
- 111.9 km²4.7% of basin
- 83.1 km²3.5% of basin
- 68.9 km²2.9% of basin
6 intersecting protected areas
Natural Resources Protection Area
677.16 km² overlap
Marismas Nacionales
IUCN Not ReportedWetland of International Importance (Ramsar Site)
64.94 km² overlap
Sierra de San Juan
IUCN Not ReportedBiosphere Reserve
51.52 km² overlap
La Papalota I
IUCN VIVoluntary Conservation Area
0.70 km² overlap
La Papalota II
IUCN VIVoluntary Conservation Area
0.68 km² overlap
Islands and Protected Areas of the Gulf of California
IUCN Not ApplicableWorld Heritage Site (natural or mixed)
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
3 819 distinct species · 86 137 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 29 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 Grande de Santiago : 18 espèces reliées par 38 interactions GloBI sur 3 types (connectance 9.4%, filtre Serrano α=0.2). 11 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°
23,2°C
Annual rain
1 353mm
Moisture idx (CMI)
-0,21
Runoff
493mm/an
PET
1 707mm
AET
898mm
Mean slope
8,9°
Water table
371cm
Forest
46%
Crops
34%
Urban
4%
Protected
31%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)