HydroBASINS lev08 watershed · #7080002590

Bassin de Río Grande de San Miguel

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 44 administrative regions : Cacaopera, Chapeltique, Chilanga, Chinameca, Chirilagua +39

9% lakePfafstetter: 77113080

Sub-basin area

2 340,5km²

Upstream area

2 340,5km²

Discharge

47,49m³/s

Mean elev.

281m

Administrative coverage

44 dept-equivalent regions (GADM L2)

San Miguel
San Miguel · El Salvador
630.5 km²
27.0% of basin
Chirilagua
San Miguel · El Salvador
135.8 km²
5.8% of basin
Concepción Batres
Usulután · El Salvador
109.4 km²
4.7% of basin
Chapeltique
San Miguel · El Salvador
103.0 km²
4.4% of basin
Moncagua
San Miguel · El Salvador
84.3 km²
3.6% of basin
Jucuarán
Usulután · El Salvador
82.0 km²
3.5% of basin
El Tránsito
San Miguel · El Salvador
80.1 km²
3.4% of basin
El Carmen
La Unión · El Salvador
79.8 km²
3.4% of basin

36 moreFull L2 list

Guatajiagua79.7 km² · 3.4%
Chinameca77.8 km² · 3.3%
Yamabal64.0 km² · 2.7%
El Divisadero60.6 km² · 2.6%
San Francisco Gotera58.1 km² · 2.5%
Sociedad52.0 km² · 2.2%
Jocoro51.7 km² · 2.2%
Chilanga46.1 km² · 2.0%
San Jorge44.2 km² · 1.9%
Santa Elena43.4 km² · 1.9%
Yayantique41.5 km² · 1.8%
San Carlos34.7 km² · 1.5%
Comacarán32.8 km² · 1.4%
Uluazapa30.7 km² · 1.3%
Lolotiquillo30.3 km² · 1.3%
Lolotique26.3 km² · 1.1%
Usulután25.7 km² · 1.1%
Sensembra25.4 km² · 1.1%
San Rafael21.6 km² · 0.9%
Delicias de Concepción21.6 km² · 0.9%
Ciudad Barrios21.1 km² · 0.9%
Jucuapa20.3 km² · 0.9%
Quelepa19.7 km² · 0.8%
Ereguayquín17.8 km² · 0.8%
Yoloaiquín15.9 km² · 0.7%
San Alejo14.8 km² · 0.6%
Sesori13.2 km² · 0.6%
Santa María10.4 km² · 0.4%
Yucuaiquín10.0 km² · 0.4%
Nueva Guadalupe6.7 km² · 0.3%
Cacaopera5.5 km² · 0.2%
Intipucá0.5 km² · 0.0%
Santiago de María0.2 km² · 0.0%
Osicala0.2 km² · 0.0%
San Simón0.1 km² · 0.0%
Gualococti0.0 km² · 0.0%

17 intersecting protected areas

Xiriualtique-Jiquilisco
IUCN Not Applicable
UNESCO-MAB Biosphere Reserve
110.82 km² overlap
Laguna de Olomega
IUCN Not Reported
Wetland of International Importance (Ramsar Site)
74.16 km² overlap
Complejo Bahía de Jiquilisco
IUCN Not Reported
Wetland of International Importance (Ramsar Site)
27.23 km² overlap
Laguna El Jocotal
IUCN Not Reported
Species/Habitat Management Area
15.60 km² overlap
Area Natural Protegida Laguna del Jocotal
IUCN Not Reported
Wetland of International Importance (Ramsar Site)
15.60 km² overlap
El Socorro
IUCN Not Reported
Natural Area
5.00 km² overlap
Hacienda Casamota y La Pezota
IUCN IV
Habitat Management Area
1.96 km² overlap
Las Moritas
IUCN Not Reported
Natural Protected Area
1.39 km² overlap
San Carlos Cacahuatique
IUCN Not Reported
Natural Protected Area
1.20 km² overlap

8 more protected areassorted by overlap area

San Juan Mercedes Silva
IUCN V
Terrestrial Protected Landscape
0.48 km² overlap
San Antonio Silva
IUCN Not Reported
Natural Protected Area
0.34 km² overlap
San Lucas o Palo Galán
IUCN Not Reported
Natural Protected Area
0.33 km² overlap
La Ortega
IUCN Not Reported
Natural Area
0.21 km² overlap
Isla Santa Rita 1
IUCN Not Reported
Natural Protected Area
0.20 km² overlap
El Paso Las Iguanas
IUCN IV
Habitat Management Area
0.09 km² overlap
San Antonio La Pupusa
IUCN IV
Habitat Management Area
0.08 km² overlap
Isla Santa Rita 1
IUCN Not Reported
Natural Protected Area
0.03 km² overlap

Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.

Species present

1 837 distinct species · 84 272 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 34 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).

RègnesAnimalPlanteChampignonBacterie

RelationsPredationParasitismeSymbiosePollinisation

StatutEn dangerVulnérableProtégéeEndémique

RègnesAnimalPlanteChampignonBacterie

RelationsPredationParasitismeSymbiosePollinisation

StatutEn dangerVulnérableProtégéeEndémique

Indicateurs du tissu écologique

Tissu écologique de Bassin de Río Grande de San Miguel : 32 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) + 2 bulles famille, 27 interactions GloBI documentées sur 5 types (connectance 4.8%, filtre Serrano α=0.2). Les 2 bulles regroupent des espèces visuellement absorbées par famille (≥3 espèces visibles).

Espèces affichées

Interactions affichées

Connectance

0.048

Patrimoniales

Plus dense que (national)0 %(top 100%)

Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).

Hydroclimate (BasinATLAS lev08)

Mean T°

25,3°C

Annual rain

1 836mm

Moisture idx (CMI)

0,02

Runoff

667mm/an

PET

1 794mm

AET

1 140mm

Mean slope

6,5°

Water table

222cm

Forest

23%

Crops

58%

Urban

Protected

HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)