HydroBASINS lev08 watershed · #4080014720
Bassin · #4080014720
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 : Ba Chẽ, Cẩm Phả, Hoành Bồ, Hạ Long
Sub-basin area
218,9km²
Upstream area
218,9km²
Discharge
6,1m³/s
Mean elev.
182m
Administrative coverage
4 dept-equivalent regions (GADM L2)
- 139.6 km²63.9% of basin
- 60.7 km²27.8% of basin
- 17.8 km²8.1% of basin
- Ba Chẽ0.3 km²0.2% of basin
1 intersecting protected areas
Dong Son-Ky Thuong
IUCN Not ReportedNature Reserve
53.57 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
30 distinct species · 40 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 2 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 · #4080014720 : 2 espèces reliées par 1 interaction GloBI sur 1 type (connectance 100.0%, 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°
22,7°C
Annual rain
2 147mm
Moisture idx (CMI)
0,43
Runoff
973mm/an
PET
1 226mm
AET
1 040mm
Mean slope
11,7°
Water table
420cm
Forest
0%
Crops
12%
Urban
16%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)