Ontologia

HydroBASINS lev08 watershed · #4081044390

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 16 administrative regions across 2 countries : Bá Thước, Cẩm Thủy, Lang Chánh, Lạc Sơn, Mai Châu +11

Pfafstetter: 44102050

Sub-basin area

2 393,4km²

Upstream area

19 251,5km²

Discharge

381,12m³/s

Mean elev.

433m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Sông Mã719 km²

▲ Receives from 2 basins

16 dept-equivalent regions (GADM L2)

8 more
  • Mai Châu21.0 km² · 0.9%
  • Viengxay20.3 km² · 0.9%
  • Thường Xuân15.3 km² · 0.6%
  • Lang Chánh15.2 km² · 0.6%
  • Thạch Thành10.3 km² · 0.4%
  • Lạc Sơn7.1 km² · 0.3%
  • Ngọc Lặc2.1 km² · 0.1%
  • Quế Phong0.4 km² · 0.0%

4 intersecting protected areas

  • Nam Xam

    IUCN VI

    National Protected Area

    245.28 km² overlap

  • Pu Luong

    IUCN Not Reported

    Nature Reserve

    133.81 km² overlap

  • Ngoc Son - Ngo Luong

    IUCN Not Reported

    Nature Reserve

    39.24 km² overlap

  • Western Nghe An

    IUCN Not Applicable

    UNESCO-MAB Biosphere Reserve

    0.26 km² overlap

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

Species present

895 distinct species · 1 836 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

1 836 obs · 39 cellules
Obs. / cellule
≥ 433
113–432
30–112
15–29
< 15

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

Ecological tissue

Sample of 42 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).

RègnesAnimalPlanteChampignonBacterie
RelationsPredationParasitismeSymbiosePollinisation
StatutEn dangerVulnérableProtégéeEndémique

Indicateurs du tissu écologique

Tissu écologique de Bassin de Sông Mã : 38 espèces reliées par 36 interactions GloBI sur 4 types (connectance 4.2%, filtre Serrano α=0.2). 4 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
42
Interactions affichées
36
Connectance
0.042
Patrimoniales
0
Plus dense que (national)0 %(top 100%)

Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).

Hydroclimate (BasinATLAS lev08)

Mean T°

22,1°C

Annual rain

1 612mm

Moisture idx (CMI)

0,17

Runoff

919mm/an

PET

1 325mm

AET

1 015mm

Mean slope

14,9°

Water table

537cm

Forest

11%

Crops

17%

Urban

1%

Protected

18%

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