HydroBASINS lev08 watershed · #4080991370
Bassin de Sông Bằng
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 : Cao Bằng, Hoà An, Hà Quảng, Nguyên Bình
Sub-basin area
214,5km²
Upstream area
1 954,1km²
Discharge
40,94m³/s
Mean elev.
340m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Sông Bằng968 km²
- Bassin de Sông Dẻ Rào771 km²
4 dept-equivalent regions (GADM L2)
- 125.8 km²58.8% of basin
- 52.0 km²24.3% of basin
- Nguyên BìnhCao Bằng · Vietnam35.3 km²16.5% of basin
- 0.9 km²0.4% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
147 distinct species · 195 observations
Source: GBIF Occurrence snapshot 2026-05-01.
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).
Indicateurs du tissu écologique
Tissu écologique de Bassin de Sông Bằng : 31 espèces reliées par 28 interactions GloBI sur 4 types (connectance 5.3%, filtre Serrano α=0.2). 2 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydroclimate (BasinATLAS lev08)
Mean T°
22,1°C
Annual rain
1 466mm
Moisture idx (CMI)
0,07
Runoff
627mm/an
PET
1 356mm
AET
1 079mm
Mean slope
9,7°
Water table
350cm
Forest
0%
Crops
13%
Urban
10%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)