Ontologia

HydroBASINS lev08 watershed · #4081025280

Bassin de Sông Tích

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 : Ba Vì, Sơn Tây, Vĩnh Tường

44% lakePfafstetter: 43681008

Sub-basin area

150,2km²

Upstream area

150,2km²

Discharge

4,27m³/s

Mean elev.

43m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Sông Hồng68 km²

▲ Receives from 0 basins

Source / headwater (no upstream basin)

3 dept-equivalent regions (GADM L2)

1 intersecting protected areas

  • Ba Vi

    IUCN II

    National Park

    9.60 km² overlap

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

Species present

136 distinct species · 182 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

182 obs · 3 cellules
Obs. / cellule
≥ 124
124–123
124–123
35–123
< 35

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

Ecological tissue

Sample of 33 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 Tích : 26 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 33 interactions GloBI sur 4 types (connectance 6.2%, filtre Serrano α=0.2). 7 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
33
Interactions affichées
33
Connectance
0.063
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°

23,3°C

Annual rain

1 606mm

Moisture idx (CMI)

0,17

Runoff

896mm/an

PET

1 332mm

AET

1 070mm

Mean slope

2,2°

Water table

91cm

Forest

0%

Crops

11%

Urban

37%

Protected

29%

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