HydroBASINS lev08 watershed · #4081005540
Bassin de Nậm Na
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 6 administrative regions across 2 countries : Honghe Hani and Yi, Mường Tè, Nậm Nhùn, Phong Thổ, Sìn Hồ +1
Sub-basin area
1 045,5km²
Upstream area
6 340,6km²
Discharge
221,49m³/s
Mean elev.
950m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de 金平河1150 km²
- Bassin de Nậm Lùm677 km²
6 dept-equivalent regions (GADM L2)
- Nậm NhùnLai Châu · Vietnam532.7 km²51.1% of basin
- Sìn HồLai Châu · Vietnam420.7 km²40.3% of basin
- Phong ThổLai Châu · Vietnam86.7 km²8.3% of basin
- 2.4 km²0.2% of basin
- 0.2 km²0.0% of basin
- Thị Xã Mường LayĐiện Biên · Vietnam0.1 km²0.0% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
147 distinct species · 278 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 14 species (selected proportionally per kingdom among those with at least one documented interaction here) to keep the graph readable. Hover for details, click to explore the full ecosystem of a species.
ℹ️ The territory contains many more species than displayed and all their documented interactions: the graph is intentionally the structural skeleton (top-N species by composite local score, edges filtered by Serrano 2009 disparity filter α=0.2).
Indicateurs du tissu écologique
Tissu écologique de Bassin de Nậm Na : 13 espèces reliées par 12 interactions GloBI sur 3 types (connectance 13.2%, filtre Serrano α=0.2). 1 bulle taxonomique (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydroclimate (BasinATLAS lev08)
Mean T°
20,2°C
Annual rain
1 629mm
Moisture idx (CMI)
0,17
Runoff
1 154mm/an
PET
1 352mm
AET
1 025mm
Mean slope
22,5°
Water table
741cm
Forest
9%
Crops
3%
Urban
1%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)