HydroBASINS lev08 watershed · #5080029040
Bassin de Catanauan 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 28 administrative regions : Agdangan, Atimonan, Buenavista, Calauag, Candelaria +23
Sub-basin area
3 352,4km²
Upstream area
3 352,4km²
Discharge
13,89m³/s
Mean elev.
110m
Administrative coverage
28 dept-equivalent regions (GADM L2)
- San Francisco320.7 km²9.6% of basin
- 265.8 km²8.0% of basin
- 263.1 km²7.9% of basin
- 241.4 km²7.2% of basin
- 236.3 km²7.1% of basin
- 205.4 km²6.1% of basin
- 179.7 km²5.4% of basin
- 176.5 km²5.3% of basin
20 moreFull L2 list
- San Andres173.8 km² · 5.2%
- Pagbilao171.1 km² · 5.1%
- Buenavista150.3 km² · 4.5%
- General Luna119.2 km² · 3.6%
- Gumaca97.1 km² · 2.9%
- Unisan96.0 km² · 2.9%
- Lucena City91.0 km² · 2.7%
- Macalelon81.8 km² · 2.4%
- Pitogo72.3 km² · 2.2%
- Lopez71.0 km² · 2.1%
- Padre Burgos64.8 km² · 1.9%
- Atimonan49.3 km² · 1.5%
- Agdangan32.7 km² · 1.0%
- Calauag20.4 km² · 0.6%
- Del Gallego18.7 km² · 0.6%
- Lucban16.0 km² · 0.5%
- Candelaria3.9 km² · 0.1%
- Santa Elena1.1 km² · 0.0%
- Nagcarlan0.0 km² · 0.0%
- Liliw0.0 km² · 0.0%
10 intersecting protected areas
Protected Landscape
45.05 km² overlap
Palsabangan River up to Mazintuto River, Bacong River to Sandoval Point Mangrove Swamp Forest Reserve
IUCN Not AssignedMangrove Swamp Forest Reserve
8.57 km² overlap
Island of Alibijaban Wildeness Area
IUCN Not AssignedWilderness Area
6.86 km² overlap
Protected Landscape
6.76 km² overlap
Binahaan River Watershed Forest Reserve
IUCN Not AssignedWatershed Forest Reserve
4.21 km² overlap
Protected Landscape
2.87 km² overlap
Lopez Watershed Forest Reserve
IUCN Not AssignedWatershed Forest Reserve
2.10 km² overlap
Protected Landscape
1.83 km² overlap
Mulanay Watershed Forest Reserve
IUCN Not AssignedWatershed Forest Reserve
0.30 km² overlap
1 more protected areassorted by overlap area
Calauag Watershed Forest Reserve
IUCN Not AssignedWatershed Forest Reserve
0.24 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 401 distinct species · 7 684 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 Catanauan River : 15 espèces reliées par 13 interactions GloBI sur 2 types (connectance 8.5%, 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°
26,6°C
Annual rain
2 327mm
Moisture idx (CMI)
0,35
Runoff
1 972mm/an
PET
1 489mm
AET
1 295mm
Mean slope
4,9°
Water table
182cm
Forest
20%
Crops
27%
Urban
10%
Protected
2%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)