HydroBASINS lev08 watershed · #5080029980
Bassin de Abra 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 23 administrative regions : Bangued, Bantay, Bucay, Caoayan, Danglas +18
Sub-basin area
821,7km²
Upstream area
4 970,8km²
Discharge
312,84m³/s
Mean elev.
270m
Administrative coverage
Hydrographic chain
▼ Drains into
Outlet (drains to ocean / endorheic)
▲ Receives from 2 basins
- Bassin de TIneg River1575 km²
- Bassin de Abra River104 km²
23 dept-equivalent regions (GADM L2)
- Danglas173.8 km²21.2% of basin
- 123.3 km²15.1% of basin
- 98.4 km²12.0% of basin
- 52.1 km²6.4% of basin
- 46.5 km²5.7% of basin
- 44.6 km²5.4% of basin
- 38.4 km²4.7% of basin
- 38.1 km²4.7% of basin
15 moreFull L2 list
- Bantay37.6 km² · 4.6%
- Tayum33.1 km² · 4.0%
- Peñarrubia27.6 km² · 3.4%
- Villaviciosa26.6 km² · 3.2%
- Lagayan16.4 km² · 2.0%
- Caoayan14.8 km² · 1.8%
- Pilar14.1 km² · 1.7%
- Vigan City13.6 km² · 1.7%
- Nueva Era12.5 km² · 1.5%
- Magsingal2.0 km² · 0.2%
- Dolores2.0 km² · 0.2%
- Bucay1.7 km² · 0.2%
- San Juan0.7 km² · 0.1%
- Narvacan0.2 km² · 0.0%
- Nagbukel0.0 km² · 0.0%
2 intersecting protected areas
Northern Luzon Heroes Hill National Park
IUCN Not AssignedNational Park
26.74 km² overlap
Cassamata Hill National Park
IUCN Not AssignedNational Park
0.55 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
139 distinct species · 349 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 31 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 Abra River : 25 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 25 interactions GloBI sur 4 types (connectance 5.4%, 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°
25,7°C
Annual rain
2 619mm
Moisture idx (CMI)
0,43
Runoff
1 920mm/an
PET
1 478mm
AET
1 091mm
Mean slope
11,0°
Water table
386cm
Forest
11%
Crops
11%
Urban
14%
Protected
3%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)