HydroBASINS lev08 watershed · #5080028150
Bassin de Barotac Viejo River
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 24 administrative regions : Ajuy, Anilao, Balasan, Banate, Barotac Nuevo +19
Sub-basin area
1 648,7km²
Upstream area
1 648,7km²
Discharge
13,59m³/s
Mean elev.
58m
Administrative coverage
24 dept-equivalent regions (GADM L2)
- 187.0 km²11.4% of basin
- 168.0 km²10.2% of basin
- Pilar119.1 km²7.3% of basin
- 104.5 km²6.4% of basin
- 103.9 km²6.3% of basin
- 99.3 km²6.0% of basin
- 93.9 km²5.7% of basin
- 81.3 km²5.0% of basin
16 moreFull L2 list
- Pontevedra80.3 km² · 4.9%
- Dumangas75.9 km² · 4.6%
- President Roxas75.5 km² · 4.6%
- Banate51.3 km² · 3.1%
- Balasan51.1 km² · 3.1%
- Barotac Nuevo50.6 km² · 3.1%
- Batad48.1 km² · 2.9%
- Estancia29.5 km² · 1.8%
- Panay29.1 km² · 1.8%
- Lemery10.7 km² · 0.7%
- San Rafael10.1 km² · 0.6%
- Ma-Ayon3.1 km² · 0.2%
- Panitan1.3 km² · 0.1%
- Zarraga0.7 km² · 0.0%
- San Enrique0.6 km² · 0.0%
- Dingle0.1 km² · 0.0%
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
479 distinct species · 1 147 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 44 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 Barotac Viejo River : 40 espèces reliées par 33 interactions GloBI sur 3 types (connectance 3.5%, filtre Serrano α=0.2). 4 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°
27,2°C
Annual rain
2 388mm
Moisture idx (CMI)
0,36
Runoff
1 254mm/an
PET
1 510mm
AET
1 398mm
Mean slope
4,6°
Water table
188cm
Forest
9%
Crops
37%
Urban
23%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)