HydroBASINS lev08 watershed · #5080027640
Bassin de Ilog 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 15 administrative regions : Ayungon, Bais City, Bayawan City, Bindoy, Candoni +10
Sub-basin area
2 109,2km²
Upstream area
2 109,3km²
Discharge
100,05m³/s
Mean elev.
302m
Administrative coverage
15 dept-equivalent regions (GADM L2)
- 690.1 km²32.9% of basin
- 356.3 km²17.0% of basin
- 171.8 km²8.2% of basin
- 164.4 km²7.8% of basin
- 138.7 km²6.6% of basin
- 121.6 km²5.8% of basin
- 89.9 km²4.3% of basin
- 85.7 km²4.1% of basin
7 moreFull L2 list
- Bindoy80.5 km² · 3.8%
- Ayungon79.3 km² · 3.8%
- Cauayan71.3 km² · 3.4%
- Tanjay City34.7 km² · 1.7%
- Jimalalud9.1 km² · 0.4%
- Sipalay City6.0 km² · 0.3%
- Manjuyod1.2 km² · 0.1%
3 intersecting protected areas
Ilog-Hilabangan Watershed Forest Reserve
IUCN Not AssignedWatershed Forest Reserve
104.84 km² overlap
Kabangkalan Watershed Forest Reserve
IUCN Not AssignedWatershed Forest Reserve
4.17 km² overlap
Wetland of International Importance (Ramsar Site)
0.02 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
580 distinct species · 1 967 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 27 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 Ilog River : 23 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 23 interactions GloBI sur 3 types (connectance 6.6%, 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°
25,9°C
Annual rain
2 329mm
Moisture idx (CMI)
0,34
Runoff
1 374mm/an
PET
1 530mm
AET
1 328mm
Mean slope
6,5°
Water table
245cm
Forest
1%
Crops
34%
Urban
6%
Protected
5%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)