HydroBASINS lev08 watershed · #5080130390
Bassin de Sungai Iwan
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 : Malinau
Sub-basin area
29km²
Upstream area
568,3km²
Discharge
20,94m³/s
Mean elev.
1 125m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Sungai Iwan278 km²
- Bassin · #5080130310261 km²
1 dept-equivalent regions (GADM L2)
- 28.9 km²100.0% of basin
1 intersecting protected areas
Kayan Mentarang
IUCN IINational Park
28.85 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
0 distinct species · 0 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°
21,0°C
Annual rain
3 562mm
Moisture idx (CMI)
0,63
Runoff
1 274mm/an
PET
1 302mm
AET
1 302mm
Mean slope
5,0°
Water table
152cm
Forest
100%
Crops
9%
Urban
0%
Protected
100%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)