Ontologia

HydroBASINS lev08 watershed · #4081003760

Bassin de Sông Gâm

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 : Chiêm Hóa, Chợ Đồn, Nà Hang

Pfafstetter: 43682430

Sub-basin area

720,7km²

Upstream area

13 591,8km²

Discharge

354,48m³/s

Mean elev.

338m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Sông Gâm649 km²

▲ Receives from 2 basins

3 dept-equivalent regions (GADM L2)

3 intersecting protected areas

  • Na Hang

    IUCN IV

    Nature Reserve

    75.95 km² overlap

  • Kim Binh

    IUCN Not Reported

    Cultural and Historical Site

    1.41 km² overlap

  • Nam Xuan Lac

    IUCN Not Reported

    Nature Reserve

    1.37 km² overlap

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

Species present

297 distinct species · 706 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

706 obs · 14 cellules
Obs. / cellule
≥ 342
127–341
25–126
17–24
< 17

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

Ecological tissue

Sample of 31 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 Gâm : 25 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 27 interactions GloBI sur 4 types (connectance 5.8%, filtre Serrano α=0.2). 6 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
31
Interactions affichées
27
Connectance
0.058
Patrimoniales
1
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°

22,0°C

Annual rain

1 714mm

Moisture idx (CMI)

0,23

Runoff

963mm/an

PET

1 327mm

AET

1 083mm

Mean slope

15,8°

Water table

563cm

Forest

4%

Crops

10%

Urban

1%

Protected

0%

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