HydroBASINS lev08 watershed · #5080022500
Bassin de Iraan 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 : Aborlan, Araceli, Balabac, Bataraza, Brooke's Point +10
Sub-basin area
7 358,9km²
Upstream area
7 358,9km²
Discharge
11,95m³/s
Mean elev.
136m
Administrative coverage
15 dept-equivalent regions (GADM L2)
- 1211.8 km²16.5% of basin
- Rizal935.7 km²12.8% of basin
- Quezon843.7 km²11.5% of basin
- San Vicente567.5 km²7.7% of basin
- 565.1 km²7.7% of basin
- 564.6 km²7.7% of basin
- 528.4 km²7.2% of basin
- Dumaran261.3 km²3.6% of basin
7 moreFull L2 list
- Bataraza229.0 km² · 3.1%
- Aborlan209.9 km² · 2.9%
- Brooke's Point206.5 km² · 2.8%
- Araceli174.5 km² · 2.4%
- Linapacan147.9 km² · 2.0%
- Narra73.5 km² · 1.0%
- Sofronio Espanola68.2 km² · 0.9%
10 intersecting protected areas
Palawan Game Refuge and Bird Sanctuary (Proc 219)
IUCN Not AssignedGame Refuge and Bird Sanctuary
4032.24 km² overlap
Protected Landscape
942.18 km² overlap
Protected Landscape
698.48 km² overlap
Managed Resource Protected Area
453.27 km² overlap
Entire Province of Palawan (Proc 2152) Mangrove Swamp Forest Reserve
IUCN Not AssignedMangrove Swamp Forest Reserve
274.98 km² overlap
Pusaka Koupu-upuan Logta Lawod Bangsa Molbog
IUCN Not ApplicableIndigenous Community Conserved Area
125.76 km² overlap
National Park
85.48 km² overlap
Puerto-Princesa Subterranean River National Park
IUCN Not ApplicableWorld Heritage Site (natural or mixed)
28.37 km² overlap
Palawan Flora, Fauna and Watershed Forest Reserve (Parcel 2)
IUCN Not AssignedWatershed Forest Reserve
24.74 km² overlap
1 more protected areassorted by overlap area
Palawan Flora, Fauna and Watershed Forest Reserve (Parcel 1)
IUCN Not AssignedWatershed Forest Reserve
0.75 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 427 distinct species · 25 075 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 20 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 Iraan River : 16 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 17 interactions GloBI sur 3 types (connectance 8.9%, 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°
26,6°C
Annual rain
1 991mm
Moisture idx (CMI)
0,24
Runoff
941mm/an
PET
1 491mm
AET
1 189mm
Mean slope
8,3°
Water table
316cm
Forest
48%
Crops
22%
Urban
0%
Protected
80%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)