Ontologia

HydroBASINS lev08 watershed · #4081070480

Bassin de Sông Ngàn Trươi

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 4 administrative regions across 2 countries : Hương Khê, Hương Sơn, Nakai, Vũ Quang

Pfafstetter: 44104024

Sub-basin area

526,9km²

Upstream area

527km²

Discharge

17,27m³/s

Mean elev.

419m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Sông Ngàn Sâu207 km²

▲ Receives from 0 basins

Source / headwater (no upstream basin)

4 dept-equivalent regions (GADM L2)

2 intersecting protected areas

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

Species present

205 distinct species · 398 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

398 obs · 11 cellules
Obs. / cellule
≥ 132
80–131
47–79
12–46
< 12

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

Ecological tissue

Sample of 25 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 Ngàn Trươi : 21 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 20 interactions GloBI sur 4 types (connectance 6.7%, filtre Serrano α=0.2). 4 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
25
Interactions affichées
20
Connectance
0.067
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°

23,0°C

Annual rain

1 873mm

Moisture idx (CMI)

0,26

Runoff

1 139mm/an

PET

1 377mm

AET

1 114mm

Mean slope

13,7°

Water table

444cm

Forest

52%

Crops

10%

Urban

1%

Protected

70%

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