HydroBASINS lev08 watershed · #5080030520
Bassin de Calabgan 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 6 administrative regions : Baler, Casiguran, Dinalungan, Dipaculao, Maria Aurora +1
Sub-basin area
697,7km²
Upstream area
697,7km²
Discharge
26,15m³/s
Mean elev.
339m
Administrative coverage
6 dept-equivalent regions (GADM L2)
- 289.4 km²41.6% of basin
- Casiguran208.5 km²30.0% of basin
- 157.4 km²22.6% of basin
- 9.5 km²1.4% of basin
- 1.2 km²0.2% of basin
- 0.6 km²0.1% of basin
9 intersecting protected areas
Metataot non Logad dit Egongot
IUCN Not ApplicableIndigenous Community Conserved Area
114.72 km² overlap
Calabgan Watershed Forest Reserve
IUCN Not AssignedWatershed Forest Reserve
46.32 km² overlap
Protected Landscape
35.84 km² overlap
Protected Landscape
32.77 km² overlap
Dipaculao Watershed Forest Reserve
IUCN Not AssignedWatershed Forest Reserve
26.73 km² overlap
Protected Landscape
22.61 km² overlap
Protected Lanscape
3.31 km² overlap
Protected Landscape
2.80 km² overlap
Protected Landscape
2.06 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
192 distinct species · 532 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 18 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 Calabgan River : 15 espèces reliées par 21 interactions GloBI sur 3 types (connectance 12.3%, 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°
25,0°C
Annual rain
3 032mm
Moisture idx (CMI)
0,49
Runoff
2 049mm/an
PET
1 536mm
AET
1 529mm
Mean slope
13,3°
Water table
344cm
Forest
46%
Crops
14%
Urban
2%
Protected
21%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)