Ontologia

HydroBASINS lev08 watershed · #4081015370

Bassin de Sông Chảy

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 : Hàm Yên, Hạ Hoà, Lục Yên, Trấn Yên, Tuyên Quang +5

169% lakePfafstetter: 43682201

Sub-basin area

806,8km²

Upstream area

6 293,6km²

Discharge

219,5m³/s

Mean elev.

96m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Sông Lô718 km²

▲ Receives from 2 basins

10 dept-equivalent regions (GADM L2)

2 more

1 intersecting protected areas

  • Thac Ba

    IUCN V

    Cultural and Historical Site

    137.03 km² overlap

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

Species present

98 distinct species · 179 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

179 obs · 11 cellules
Obs. / cellule
≥ 80
39–79
9–38
6–8
< 6

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

Ecological tissue

Sample of 18 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 Chảy : 12 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 25 interactions GloBI sur 3 types (connectance 13.2%, filtre Serrano α=0.2). 8 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
20
Interactions affichées
25
Connectance
0.132
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 774mm

Moisture idx (CMI)

0,23

Runoff

954mm/an

PET

1 365mm

AET

1 131mm

Mean slope

5,6°

Water table

233cm

Forest

0%

Crops

23%

Urban

7%

Protected

17%

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