Ontologia

HydroBASINS lev08 watershed · #4081009800

Bassin de Sông Lô

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 6 administrative regions : Bắc Quang, Chiêm Hóa, Hàm Yên, Lục Yên, Yên Bình +1

Pfafstetter: 43682500

Sub-basin area

1 033,1km²

Upstream area

12 178,1km²

Discharge

390,31m³/s

Mean elev.

194m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Sông Lô647 km²

▲ Receives from 2 basins

6 dept-equivalent regions (GADM L2)

1 intersecting protected areas

  • Cham Chu

    IUCN Not Reported

    Nature Reserve

    57.58 km² overlap

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

Species present

405 distinct species · 835 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

835 obs · 20 cellules
Obs. / cellule
≥ 678
50–677
11–49
5–10
< 5

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

Ecological tissue

Sample of 11 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 Lô : 11 espèces reliées par 6 interactions GloBI sur 3 types (connectance 10.9%, filtre Serrano α=0.2).

Espèces affichées
11
Interactions affichées
6
Connectance
0.109
Patrimoniales
0
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°

22,8°C

Annual rain

1 770mm

Moisture idx (CMI)

0,23

Runoff

1 114mm/an

PET

1 355mm

AET

1 124mm

Mean slope

10,8°

Water table

398cm

Forest

0%

Crops

11%

Urban

4%

Protected

0%

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