HydroBASINS lev08 watershed · #5080048230
Bassin de Arn 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 1 administrative regions : Rai Coast
Sub-basin area
494,5km²
Upstream area
494,5km²
Discharge
7,19m³/s
Mean elev.
760m
Administrative coverage
1 dept-equivalent regions (GADM L2)
- Rai CoastMadang · Papua New Guinea478.1 km²97.1% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
49 distinct species · 72 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Not enough documented interactions to build a meaningful graph for this territory.
Hydroclimate (BasinATLAS lev08)
Mean T°
23,1°C
Annual rain
2 328mm
Moisture idx (CMI)
0,35
Runoff
1 550mm/an
PET
1 503mm
AET
1 389mm
Mean slope
16,6°
Water table
500cm
Forest
54%
Crops
6%
Urban
1%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)