HydroBASINS lev08 watershed · #7080875720
Bassin de Rio Piedra Rajada o Curtidora
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 : Chalchuapa, Coatepeque, Juayúa, Opico, San Matías +2
Sub-basin area
468,4km²
Upstream area
468,4km²
Discharge
13,69m³/s
Mean elev.
650m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
7 dept-equivalent regions (GADM L2)
- Santa AnaSanta Ana · El Salvador200.0 km²42.9% of basin
- CoatepequeSanta Ana · El Salvador108.3 km²23.2% of basin
- OpicoLa Libertad · El Salvador81.4 km²17.4% of basin
- San Pablo TacachicoLa Libertad · El Salvador53.5 km²11.5% of basin
- San MatíasLa Libertad · El Salvador23.0 km²4.9% of basin
- ChalchuapaSanta Ana · El Salvador0.5 km²0.1% of basin
- JuayúaSonsonate · El Salvador0.0 km²0.0% of basin
4 intersecting protected areas
Apaneca-Ilamatepec
IUCN Not ApplicableUNESCO-MAB Biosphere Reserve
21.35 km² overlap
Talcualhuya
IUCN Not ReportedNatural Protected Area
6.29 km² overlap
El Chaparrón o San Cayetano
IUCN Not ReportedProtected Area with Managed Resources
0.56 km² overlap
Los Volcanes
IUCN IINational Park
0.01 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
966 distinct species · 93 505 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 23 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 Rio Piedra Rajada o Curtidora : 15 espèces + 8 bulles famille, 21 interactions GloBI documentées sur 2 types (connectance 8.3%, filtre Serrano α=0.2). Les 8 bulles regroupent des espèces visuellement absorbées par famille (≥3 espèces visibles).
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 837mm
Moisture idx (CMI)
0,04
Runoff
863mm/an
PET
1 748mm
AET
1 141mm
Mean slope
6,8°
Water table
197cm
Forest
38%
Crops
50%
Urban
15%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)