Ontologia

HydroBASINS lev08 watershed · #4081003480

Bassin de Nậm Mạ

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 5 administrative regions : Lai Châu, Phong Thổ, Sìn Hồ, Tam Đường, Tân Uyên

Pfafstetter: 43685076

Sub-basin area

732,5km²

Upstream area

732,6km²

Discharge

26,58m³/s

Mean elev.

767m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Sông Đà832 km²

▲ Receives from 0 basins

Source / headwater (no upstream basin)

5 dept-equivalent regions (GADM L2)

  • Sìn Hồ
    Lai Châu · Vietnam
    727.8 km²
    99.6% of basin
  • Tân Uyên
    Lai Châu · Vietnam
    1.5 km²
    0.2% of basin
  • Tam Đường
    Lai Châu · Vietnam
    1.3 km²
    0.2% of basin
  • Phong Thổ
    Lai Châu · Vietnam
    0.0 km²
    0.0% of basin
  • Lai Châu
    Lai Châu · Vietnam
    0.0 km²
    0.0% of basin

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

Species present

211 distinct species · 479 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

479 obs · 18 cellules
Obs. / cellule
≥ 119
83–118
36–82
16–35
< 16

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

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).

RègnesAnimalPlanteChampignonBacterie
RelationsPredationParasitismeSymbiosePollinisation
StatutEn dangerVulnérableProtégéeEndémique

Indicateurs du tissu écologique

Tissu écologique de Bassin de Nậm Mạ : 13 espèces reliées par 10 interactions GloBI sur 3 types (connectance 11.0%, filtre Serrano α=0.2). 1 bulle taxonomique (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
14
Interactions affichées
10
Connectance
0.110
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°

20,9°C

Annual rain

1 754mm

Moisture idx (CMI)

0,22

Runoff

1 139mm/an

PET

1 358mm

AET

1 066mm

Mean slope

16,5°

Water table

501cm

Forest

10%

Crops

2%

Urban

1%

Protected

0%

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