HydroBASINS lev08 watershed · #4080014600
Bassin de Sông Tiên Yên
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 8 administrative regions across 2 countries : Ba Chẽ, Bình Liêu, Chongzuo, Fangchenggang, Hải Hà +3
Sub-basin area
1 094,8km²
Upstream area
1 094,9km²
Discharge
25,81m³/s
Mean elev.
365m
Administrative coverage
8 dept-equivalent regions (GADM L2)
- Bình Liêu465.9 km²42.7% of basin
- 357.6 km²32.8% of basin
- 187.2 km²17.1% of basin
- 68.9 km²6.3% of basin
- 9.3 km²0.9% of basin
- 1.7 km²0.2% of basin
- 1.0 km²0.1% of basin
- Ba Chẽ0.2 km²0.0% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
98 distinct species · 198 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 5 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 Tiên Yên : 5 espèces reliées par 3 interactions GloBI sur 1 type (connectance 30.0%, filtre Serrano α=0.2).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydroclimate (BasinATLAS lev08)
Mean T°
21,4°C
Annual rain
1 887mm
Moisture idx (CMI)
0,34
Runoff
973mm/an
PET
1 227mm
AET
1 057mm
Mean slope
14,9°
Water table
497cm
Forest
4%
Crops
9%
Urban
2%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)