Ontologia

HydroBASINS lev08 watershed · #4081027640

Bassin de Sông Mã

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 across 2 countries : Sông Mã, Sốp Cộp, Viengthong

Pfafstetter: 44102094

Sub-basin area

921,2km²

Upstream area

921,5km²

Discharge

14,52m³/s

Mean elev.

1 094m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Sông Mã115 km²

▲ Receives from 0 basins

Source / headwater (no upstream basin)

3 dept-equivalent regions (GADM L2)

  • Sốp Cộp
    Sơn La · Vietnam
    687.6 km²
    74.8% of basin
  • Sông Mã
    Sơn La · Vietnam
    227.3 km²
    24.7% of basin
  • Viengthong
    Houaphan · Laos
    3.8 km²
    0.4% of basin

2 intersecting protected areas

Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.

Species present

7 distinct species · 22 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

22 obs · 4 cellules
Obs. / cellule
≥ 9
9–8
8–8
8–7
< 8

Source : GBIF — observations agrégées par hexagones 0.027° × 0.027° (~22km), filtre précision coordonnée < 10 km. Fond carte : OpenFreeMap · © OpenStreetMap.

Ecological tissue

Not enough documented interactions to build a meaningful graph for this territory.

Hydroclimate (BasinATLAS lev08)

Mean T°

19,3°C

Annual rain

1 577mm

Moisture idx (CMI)

0,15

Runoff

507mm/an

PET

1 335mm

AET

958mm

Mean slope

17,6°

Water table

581cm

Forest

1%

Crops

2%

Urban

2%

Protected

18%

HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)