HydroBASINS lev08 watershed · #7080003770
Bassin de Las Arenas
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 : La Concordia, Mapastepec, Pijijiapan
Sub-basin area
776km²
Upstream area
776km²
Discharge
37,63m³/s
Mean elev.
283m
Administrative coverage
3 dept-equivalent regions (GADM L2)
- 679.5 km²87.9% of basin
- 80.7 km²10.4% of basin
- 12.9 km²1.7% of basin
8 intersecting protected areas
Reserva de la Biosfera La Encrucijada
IUCN Not ReportedWetland of International Importance (Ramsar Site)
114.04 km² overlap
La Encrucijada
IUCN IaBiosphere Reserve
114.04 km² overlap
La Encrucijada
IUCN Not ApplicableUNESCO-MAB Biosphere Reserve
114.04 km² overlap
El Triunfo
IUCN IaBiosphere Reserve
72.33 km² overlap
El Triunfo
IUCN Not ApplicableUNESCO-MAB Biosphere Reserve
72.32 km² overlap
La Encrucijada
IUCN Not ReportedEcological Conservation
5.80 km² overlap
Las Nubes
IUCN VIVoluntary Conservation Area
2.14 km² overlap
Natural Resources Protection Area
0.53 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 434 distinct species · 10 948 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).
Indicateurs du tissu écologique
Tissu écologique de Bassin de Las Arenas : 25 espèces reliées par 40 interactions GloBI sur 4 types (connectance 6.7%, filtre Serrano α=0.2). 10 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°
25,7°C
Annual rain
2 469mm
Moisture idx (CMI)
0,21
Runoff
1 253mm/an
PET
1 933mm
AET
1 283mm
Mean slope
7,9°
Water table
260cm
Forest
39%
Crops
76%
Urban
0%
Protected
25%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)