HydroBASINS lev08 watershed · #4081058860
Bassin de Nam Siam
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 : Phaxay, Thathom, Xaysomboun
Sub-basin area
582,5km²
Upstream area
582,5km²
Discharge
13,6m³/s
Mean elev.
1 201m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
3 dept-equivalent regions (GADM L2)
- 313.3 km²54.0% of basin
- 261.4 km²45.0% of basin
- 6.0 km²1.0% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
13 distinct species · 28 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°
20,0°C
Annual rain
1 674mm
Moisture idx (CMI)
0,15
Runoff
914mm/an
PET
1 411mm
AET
958mm
Mean slope
17,8°
Water table
569cm
Forest
21%
Crops
1%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)