HydroBASINS lev08 watershed · #5080142200
Bassin de Sungai Nyaan
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 3 administrative regions : Kutai Barat, Malinau, Murung Raya
Sub-basin area
839km²
Upstream area
8 911,4km²
Discharge
657m³/s
Mean elev.
509m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Sungai Tepai797 km²
- Bassin de Sungai Mahakam644 km²
3 dept-equivalent regions (GADM L2)
- 825.6 km²98.8% of basin
- 7.6 km²0.9% of basin
- 2.0 km²0.2% of basin
1 intersecting protected areas
Bukit Sapat Hawung
IUCN IaNature Reserve
6.88 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 distinct species · 1 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°
24,0°C
Annual rain
3 820mm
Moisture idx (CMI)
0,63
Runoff
1 886mm/an
PET
1 431mm
AET
1 431mm
Mean slope
12,2°
Water table
343cm
Forest
96%
Crops
11%
Urban
0%
Protected
8%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)