HydroBASINS lev08 watershed · #4081022470
Bassin · #4081022470
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 : Hoành Bồ, Lục Nam, Lục Ngạn, Sơn Động, Uông Bí +1
Sub-basin area
227,7km²
Upstream area
227,7km²
Discharge
5,3m³/s
Mean elev.
240m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
6 dept-equivalent regions (GADM L2)
- 224.8 km²99.0% of basin
- Lục NamBắc Giang · Vietnam1.2 km²0.5% of basin
- 0.6 km²0.3% of basin
- 0.2 km²0.1% of basin
- Đông Triều0.2 km²0.1% of basin
- 0.1 km²0.0% of basin
1 intersecting protected areas
Tay Yen Tu
IUCN IVNature Reserve
58.78 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
94 distinct species · 177 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 16 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 · #4081022470 : 15 espèces reliées par 11 interactions GloBI sur 3 types (connectance 9.2%, filtre Serrano α=0.2). 1 bulle taxonomique (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°
22,5°C
Annual rain
1 673mm
Moisture idx (CMI)
0,26
Runoff
721mm/an
PET
1 238mm
AET
1 024mm
Mean slope
12,9°
Water table
501cm
Forest
16%
Crops
9%
Urban
2%
Protected
5%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)