HydroBASINS lev08 watershed · #5080029240
Bassin de Alulod 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 20 administrative regions : Agoncillo, Alfonso, Alitagtag, Balete, Calaca +15
Sub-basin area
698,6km²
Upstream area
698,8km²
Discharge
23,99m³/s
Mean elev.
134m
Administrative coverage
20 dept-equivalent regions (GADM L2)
- Taal lake241.2 km²34.6% of basin
- 69.5 km²10.0% of basin
- 60.5 km²8.7% of basin
- 49.4 km²7.1% of basin
- 39.5 km²5.7% of basin
- 33.9 km²4.9% of basin
- 33.5 km²4.8% of basin
- 31.6 km²4.5% of basin
12 moreFull L2 list
- Malvar24.1 km² · 3.5%
- Balete22.0 km² · 3.2%
- San Nicolas18.1 km² · 2.6%
- Mataas Na Kahoy17.6 km² · 2.5%
- Taal16.8 km² · 2.4%
- Cuenca13.4 km² · 1.9%
- Alitagtag12.0 km² · 1.7%
- Santa Teresita7.7 km² · 1.1%
- Alfonso3.0 km² · 0.4%
- Calaca2.2 km² · 0.3%
- Nasugbu0.0 km² · 0.0%
- San Jose0.0 km² · 0.0%
1 intersecting protected areas
Protected Landscape
613.43 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
778 distinct species · 4 343 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 41 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 Alulod River : 33 espèces reliées par 45 interactions GloBI sur 3 types (connectance 5.5%, filtre Serrano α=0.2). 8 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°
26,6°C
Annual rain
1 926mm
Moisture idx (CMI)
0,20
Runoff
1 437mm/an
PET
1 521mm
AET
1 178mm
Mean slope
4,6°
Water table
178cm
Forest
14%
Crops
33%
Urban
39%
Protected
88%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)