Ontologia

HydroBASINS lev08 watershed · #4081045810

Bassin de Sông Chu

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 9 administrative regions across 2 countries : Lang Chánh, Như Thanh, Như Xuân, Quế Phong, Quỳ Châu +4

Pfafstetter: 44102023

Sub-basin area

2 171,7km²

Upstream area

6 455km²

Discharge

139,09m³/s

Mean elev.

506m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Sông Chu438 km²

▲ Receives from 2 basins

9 dept-equivalent regions (GADM L2)

1 more

3 intersecting protected areas

  • Western Nghe An

    IUCN Not Applicable

    UNESCO-MAB Biosphere Reserve

    621.65 km² overlap

  • Xuan Lien

    IUCN Not Reported

    Nature Reserve

    256.33 km² overlap

  • Pu Hoat

    IUCN Not Reported

    Nature Reserve

    70.24 km² overlap

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

Species present

417 distinct species · 2 340 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

2 340 obs · 29 cellules
Obs. / cellule
≥ 1 103
206–1 102
70–205
15–69
< 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 29 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 Chu : 24 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 22 interactions GloBI sur 3 types (connectance 5.4%, filtre Serrano α=0.2). 5 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
29
Interactions affichées
22
Connectance
0.054
Patrimoniales
2
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°

21,8°C

Annual rain

1 543mm

Moisture idx (CMI)

0,13

Runoff

863mm/an

PET

1 329mm

AET

1 019mm

Mean slope

15,3°

Water table

525cm

Forest

24%

Crops

8%

Urban

0%

Protected

0%

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