Ontologia

HydroBASINS lev08 watershed · #4080998270

Bassin de Sông Năng

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 10 administrative regions : Ba Bể, Bạch Thông, Bảo Lâm, Bảo Lạc, Chợ Đồn +5

Pfafstetter: 43682440

Sub-basin area

2 298,5km²

Upstream area

2 298,5km²

Discharge

53,83m³/s

Mean elev.

576m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Sông Gâm721 km²

▲ Receives from 0 basins

Source / headwater (no upstream basin)

10 dept-equivalent regions (GADM L2)

2 more

5 intersecting protected areas

  • Ba Be

    IUCN Not Reported

    National Park

    99.41 km² overlap

  • Ba Be

    IUCN Not Reported

    Wetland of International Importance (Ramsar Site)

    99.41 km² overlap

  • Na Hang

    IUCN IV

    Nature Reserve

    99.30 km² overlap

  • Nui Pia Oac

    IUCN IV

    Nature Reserve

    68.19 km² overlap

  • Nam Xuan Lac

    IUCN Not Reported

    Nature Reserve

    14.83 km² overlap

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

Species present

1 683 distinct species · 6 875 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

6 875 obs · 48 cellules
Obs. / cellule
≥ 2 506
145–2 505
17–144
5–16
< 5

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

Ecological tissue

Sample of 24 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 Năng : 23 espèces reliées par 14 interactions GloBI sur 3 types (connectance 5.1%, filtre Serrano α=0.2). 1 bulle taxonomique (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
24
Interactions affichées
14
Connectance
0.051
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°

20,8°C

Annual rain

1 645mm

Moisture idx (CMI)

0,22

Runoff

799mm/an

PET

1 284mm

AET

1 053mm

Mean slope

17,4°

Water table

624cm

Forest

2%

Crops

6%

Urban

0%

Protected

6%

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