HydroBASINS lev08 watershed · #5080026630
Bassin de Gandara 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 13 administrative regions : Calbayog City, Catbalogan City, Gandara, Jiabong, Matuguinao +8
Sub-basin area
1 117,9km²
Upstream area
1 118,2km²
Discharge
52,15m³/s
Mean elev.
166m
Administrative coverage
13 dept-equivalent regions (GADM L2)
- 292.0 km²26.2% of basin
- 280.0 km²25.1% of basin
- 133.1 km²12.0% of basin
- 104.0 km²9.3% of basin
- 101.1 km²9.1% of basin
- 72.9 km²6.5% of basin
- 37.3 km²3.3% of basin
- 28.8 km²2.6% of basin
5 moreFull L2 list
- Pagsanghan25.0 km² · 2.2%
- Silvino Lobos17.9 km² · 1.6%
- Jiabong13.7 km² · 1.2%
- Motiong4.8 km² · 0.4%
- Paranas1.1 km² · 0.1%
2 intersecting protected areas
Samar Island Natural Park
IUCN IINatural Park
215.02 km² overlap
Marine Protected Area Network within Biri-Larosa Protected Landscape and Seascape
IUCN Not ApplicableMarine Protected Area Network
1.96 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
459 distinct species · 885 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 17 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 Gandara River : 15 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 15 interactions GloBI sur 3 types (connectance 11.0%, filtre Serrano α=0.2). 2 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°
26,1°C
Annual rain
2 932mm
Moisture idx (CMI)
0,49
Runoff
1 932mm/an
PET
1 494mm
AET
1 481mm
Mean slope
7,7°
Water table
217cm
Forest
25%
Crops
36%
Urban
3%
Protected
37%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)