Ontologia

HydroBASINS lev08 watershed · #4081025320

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 : Mai Sơn, Sông Mã, Thuận Châu

Pfafstetter: 44102096

Sub-basin area

731,5km²

Upstream area

732km²

Discharge

13,19m³/s

Mean elev.

934m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Sông Mã169 km²

▲ Receives from 0 basins

Source / headwater (no upstream basin)

3 dept-equivalent regions (GADM L2)

  • Mai Sơn
    Sơn La · Vietnam
    276.2 km²
    37.9% of basin
  • Thuận Châu
    Sơn La · Vietnam
    266.7 km²
    36.6% of basin
  • Sông Mã
    Sơn La · Vietnam
    186.5 km²
    25.6% of basin

1 intersecting protected areas

  • Copia

    IUCN Not Reported

    Nature Reserve

    48.62 km² overlap

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

Species present

26 distinct species · 78 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

78 obs · 4 cellules
Obs. / cellule
≥ 65
65–64
8–64
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°

19,8°C

Annual rain

1 585mm

Moisture idx (CMI)

0,15

Runoff

583mm/an

PET

1 345mm

AET

981mm

Mean slope

19,6°

Water table

682cm

Forest

1%

Crops

3%

Urban

0%

Protected

0%

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