HydroBASINS lev08 watershed · #5080029430
Bassin de Pamatawan 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 25 administrative regions : Abucay, Bagac, Balanga City, Botolan, Cabangan +20
Sub-basin area
2 791,9km²
Upstream area
2 791,9km²
Discharge
1,28m³/s
Mean elev.
217m
Administrative coverage
25 dept-equivalent regions (GADM L2)
- 265.6 km²9.5% of basin
- 240.3 km²8.6% of basin
- 227.4 km²8.2% of basin
- 198.8 km²7.1% of basin
- 185.5 km²6.7% of basin
- 182.1 km²6.5% of basin
- San Antonio179.4 km²6.4% of basin
- 172.4 km²6.2% of basin
17 moreFull L2 list
- Hermosa133.7 km² · 4.8%
- San Felipe96.1 km² · 3.5%
- Botolan95.7 km² · 3.4%
- Dinalupihan95.1 km² · 3.4%
- San Narciso83.1 km² · 3.0%
- Balanga City80.7 km² · 2.9%
- Abucay77.7 km² · 2.8%
- Limay74.2 km² · 2.7%
- Castillejos72.0 km² · 2.6%
- Orion59.7 km² · 2.1%
- Orani53.2 km² · 1.9%
- Samal46.8 km² · 1.7%
- Pilar41.1 km² · 1.5%
- Lubao25.1 km² · 0.9%
- Floridablanca6.4 km² · 0.2%
- Mabalacat0.9 km² · 0.0%
- Porac0.0 km² · 0.0%
8 intersecting protected areas
Bataan Natural Park
IUCN IINatural Park
199.80 km² overlap
Olongapo Watershed Forest Reserve
IUCN Not AssignedWatershed Forest Reserve
62.85 km² overlap
Kabiyayan Hinlagi
IUCN Not ApplicableIndigenous Community Conserved Area
39.49 km² overlap
Zambales Marine Protected Area Network
IUCN Not ApplicableMarine Protected Area Network
31.28 km² overlap
Protected Landscape
9.49 km² overlap
Watershed Purposes of Mariveles (Palanas) Watershed and Forest Range
IUCN Not AssignedWatershed and Forest Range
3.47 km² overlap
Wetland of International Importance (Ramsar Site)
0.05 km² overlap
Olongapo Naval Base Perimeter National Park
IUCN Not AssignedNational Park
0.05 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 215 distinct species · 75 140 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 33 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 Pamatawan River : 27 espèces reliées par 37 interactions GloBI sur 3 types (connectance 7.0%, 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°
26,4°C
Annual rain
3 194mm
Moisture idx (CMI)
0,52
Runoff
2 124mm/an
PET
1 510mm
AET
1 094mm
Mean slope
8,9°
Water table
291cm
Forest
15%
Crops
24%
Urban
18%
Protected
16%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)