HydroBASINS lev08 watershed · #4081063090
Bassin de Nam Sang
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 4 administrative regions across 2 countries : Kỳ Sơn, Morkmay, Tương Dương, Viengthong
Sub-basin area
715,9km²
Upstream area
715,9km²
Discharge
19,26m³/s
Mean elev.
864m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
4 dept-equivalent regions (GADM L2)
- 426.9 km²59.8% of basin
- 285.9 km²40.1% of basin
- 0.6 km²0.1% of basin
- 0.4 km²0.1% of basin
2 intersecting protected areas
Yodnammo-Phousamsoum
IUCN Not ReportedNational Protected Area
184.70 km² overlap
Western Nghe An
IUCN Not ApplicableUNESCO-MAB Biosphere Reserve
1.11 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
8 distinct species · 8 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°
21,1°C
Annual rain
1 695mm
Moisture idx (CMI)
0,17
Runoff
848mm/an
PET
1 399mm
AET
959mm
Mean slope
19,4°
Water table
587cm
Forest
46%
Crops
2%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)