HydroBASINS lev08 watershed · #4081055930
Bassin de Nậm Nơn
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 2 administrative regions : Kỳ Sơn, Tương Dương
Sub-basin area
202,2km²
Upstream area
8 761,7km²
Discharge
131,54m³/s
Mean elev.
442m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Nậm Nơn851 km²
- Bassin de Nậm Nơn183 km²
2 dept-equivalent regions (GADM L2)
- 166.9 km²82.8% of basin
- 34.7 km²17.2% of basin
1 intersecting protected areas
Western Nghe An
IUCN Not ApplicableUNESCO-MAB Biosphere Reserve
201.60 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
Graphe en cours d’indexation
Calcul du tissu écologique de cette entité.
Le graphe apparaîtra automatiquement dès que le calcul est terminé (rafraîchissement toutes les 2s).
Hydroclimate (BasinATLAS lev08)
Mean T°
22,9°C
Annual rain
1 231mm
Moisture idx (CMI)
-0,14
Runoff
593mm/an
PET
1 435mm
AET
922mm
Mean slope
20,2°
Water table
720cm
Forest
1%
Crops
5%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)