Ontologia

HydroBASINS lev08 watershed · #4081000720

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 9 administrative regions : Bắc Mê, Bắc Quang, Chiêm Hóa, Hoàng Su Phì, Hà Giang +4

Pfafstetter: 43682700

Sub-basin area

1 743,2km²

Upstream area

9 735,3km²

Discharge

283,06m³/s

Mean elev.

431m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Sông Lô1033 km²

▲ Receives from 2 basins

9 dept-equivalent regions (GADM L2)

1 more

3 intersecting protected areas

  • Tay Con Linh

    IUCN Not Reported

    Nature Reserve

    60.92 km² overlap

  • Cham Chu

    IUCN Not Reported

    Nature Reserve

    37.16 km² overlap

  • Bac Me

    IUCN Not Reported

    Nature Reserve

    1.80 km² overlap

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

Species present

453 distinct species · 957 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

957 obs · 22 cellules
Obs. / cellule
≥ 553
81–552
12–80
5–11
< 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 21 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 : 20 espèces reliées par 16 interactions GloBI sur 3 types (connectance 7.6%, filtre Serrano α=0.2). 1 bulle taxonomique (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
21
Interactions affichées
16
Connectance
0.076
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°

22,0°C

Annual rain

1 908mm

Moisture idx (CMI)

0,30

Runoff

1 304mm/an

PET

1 334mm

AET

1 132mm

Mean slope

15,4°

Water table

553cm

Forest

2%

Crops

6%

Urban

2%

Protected

0%

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