HydroBASINS lev08 watershed · #5080029380
Bassin de Santa Maria 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 : Angat, Balagtas, Baliuag, Bocaue, Bulacan +15
Sub-basin area
578,3km²
Upstream area
578,3km²
Discharge
26,08m³/s
Mean elev.
54m
Administrative coverage
20 dept-equivalent regions (GADM L2)
- San Jose del Monte CityBulacan · Philippines104.6 km²18.1% of basin
- Santa MariaBulacan · Philippines89.5 km²15.5% of basin
- PandiBulacan · Philippines41.8 km²7.2% of basin
- BulacanBulacan · Philippines40.5 km²7.0% of basin
- Meycauayan CityBulacan · Philippines37.6 km²6.5% of basin
- NorzagarayBulacan · Philippines35.3 km²6.1% of basin
- BustosBulacan · Philippines32.8 km²5.7% of basin
- MarilaoBulacan · Philippines31.1 km²5.4% of basin
12 moreFull L2 list
- Plaridel27.2 km² · 4.7%
- Kalookan City27.0 km² · 4.7%
- Valenzuela21.5 km² · 3.7%
- Bocaue20.8 km² · 3.6%
- Guiguinto20.4 km² · 3.5%
- Balagtas19.2 km² · 3.3%
- Malolos City7.5 km² · 1.3%
- Baliuag7.2 km² · 1.3%
- Obando4.6 km² · 0.8%
- Angat4.1 km² · 0.7%
- Pulilan2.0 km² · 0.4%
- Quezon City0.0 km² · 0.0%
2 intersecting protected areas
Wildlife Sanctuary
7.96 km² overlap
Angat (Pilot) Watershed and Forest Range
IUCN Not AssignedWatershed and Forest Range
0.30 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
578 distinct species · 7 464 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 30 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 Santa Maria River : 24 espèces reliées par 36 interactions GloBI sur 3 types (connectance 8.3%, filtre Serrano α=0.2). 6 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°
27,0°C
Annual rain
2 575mm
Moisture idx (CMI)
0,40
Runoff
1 478mm/an
PET
1 540mm
AET
1 203mm
Mean slope
1,5°
Water table
65cm
Forest
1%
Crops
35%
Urban
87%
Protected
2%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)