HydroBASINS lev08 watershed · #5080028250
Bassin de Tigum 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 : Alimodian, Anini-Y, Cabatuan, Guimbal, Hamtic +20
Sub-basin area
1 660,8km²
Upstream area
1 660,8km²
Discharge
4,49m³/s
Mean elev.
198m
Administrative coverage
25 dept-equivalent regions (GADM L2)
- 199.7 km²12.1% of basin
- 156.0 km²9.4% of basin
- 146.2 km²8.8% of basin
- 132.9 km²8.0% of basin
- 127.3 km²7.7% of basin
- 117.5 km²7.1% of basin
- 90.3 km²5.5% of basin
- 87.8 km²5.3% of basin
17 moreFull L2 list
- Oton85.4 km² · 5.2%
- Cabatuan78.5 km² · 4.7%
- Iloilo City70.8 km² · 4.3%
- Santa Barbara68.7 km² · 4.2%
- Tobias Fornier48.7 km² · 2.9%
- Anini-Y40.8 km² · 2.5%
- Guimbal40.7 km² · 2.5%
- Leganes31.7 km² · 1.9%
- San Miguel31.5 km² · 1.9%
- Pavia27.9 km² · 1.7%
- San Remigio15.1 km² · 0.9%
- Hamtic12.4 km² · 0.7%
- Zarraga7.4 km² · 0.4%
- New Lucena3.4 km² · 0.2%
- Janiuay3.2 km² · 0.2%
- Valderrama2.4 km² · 0.1%
- Sibalom0.6 km² · 0.0%
2 intersecting protected areas
Maasin Watershed Forest Reserve
IUCN Not AssignedWatershed Forest Reserve
63.94 km² overlap
Sibalom Natural Park
IUCN IINatural Park
0.68 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
817 distinct species · 8 583 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 24 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 Tigum River : 21 espèces reliées par 21 interactions GloBI sur 3 types (connectance 7.6%, 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°
26,2°C
Annual rain
2 429mm
Moisture idx (CMI)
0,41
Runoff
1 807mm/an
PET
1 417mm
AET
1 204mm
Mean slope
7,3°
Water table
243cm
Forest
4%
Crops
36%
Urban
40%
Protected
4%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)