HydroBASINS lev08 watershed · #6080091060
Bassin de Río San Andrés
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 : Belmira, Briceño, San Andrés de Cuerquia, San José de la Montaña, Santa Rosa de Osos +2
Sub-basin area
494,8km²
Upstream area
494,8km²
Discharge
26,95m³/s
Mean elev.
2 191m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
7 dept-equivalent regions (GADM L2)
- 166.6 km²33.8% of basin
- 122.5 km²24.9% of basin
- 67.2 km²13.6% of basin
- 51.9 km²10.5% of basin
- 39.0 km²7.9% of basin
- 25.7 km²5.2% of basin
- 19.7 km²4.0% of basin
3 intersecting protected areas
Integrated Management Regional Districts
64.05 km² overlap
Chaquiral
IUCN VICivil Society Nature Reserve
4.61 km² overlap
Cuenca Hidrográfica Río Grande y Chico
IUCN Not ApplicableWatershed
2.52 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 527 distinct species · 79 330 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 37 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 San Andrés : 32 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 37 interactions GloBI sur 3 types (connectance 5.6%, filtre Serrano α=0.2). 5 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°
16,4°C
Annual rain
2 783mm
Moisture idx (CMI)
0,50
Runoff
1 715mm/an
PET
1 347mm
AET
1 292mm
Mean slope
17,5°
Water table
539cm
Forest
34%
Crops
6%
Urban
0%
Protected
13%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)