HydroBASINS lev08 watershed · #5080113700
Bassin de Pinacanauan de Tumauini 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 9 administrative regions : Cabagan, Delfin Albano, Divilacan, Maconacon, Quezon +4
Sub-basin area
825,6km²
Upstream area
18 283,7km²
Discharge
887,32m³/s
Mean elev.
291m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Mallig River2012 km²
- Bassin de Cagayan River143 km²
9 dept-equivalent regions (GADM L2)
- 268.4 km²32.6% of basin
- 181.6 km²22.1% of basin
- 167.7 km²20.4% of basin
- 76.9 km²9.3% of basin
- Santo Tomas56.7 km²6.9% of basin
- 37.2 km²4.5% of basin
- Quezon22.0 km²2.7% of basin
- 10.0 km²1.2% of basin
1 moreFull L2 list
- Quirino2.5 km² · 0.3%
3 intersecting protected areas
Natural Park
112.03 km² overlap
Tumauini Watershed Forest Reserve
IUCN Not AssignedWatershed Forest Reserve
63.09 km² overlap
Malasi Tree Park and Wildlife Sanctuary Critical Habitat
IUCN Not ApplicableCritical Habitat
1.39 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
172 distinct species · 328 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 21 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 Pinacanauan de Tumauini River : 19 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 17 interactions GloBI sur 3 types (connectance 7.4%, filtre Serrano α=0.2). 3 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 244mm
Moisture idx (CMI)
0,27
Runoff
1 144mm/an
PET
1 530mm
AET
1 243mm
Mean slope
8,1°
Water table
284cm
Forest
26%
Crops
27%
Urban
12%
Protected
21%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)