HydroBASINS lev08 watershed · #4080015440
Bassin de Sông Son
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 across 2 countries : Ba Đồn, Bualapha, Bố Trạch, Minh Hóa, Quảng Ninh +1
Sub-basin area
1 841,1km²
Upstream area
1 841,1km²
Discharge
79,49m³/s
Mean elev.
404m
Administrative coverage
6 dept-equivalent regions (GADM L2)
- 1550.7 km²84.5% of basin
- 121.1 km²6.6% of basin
- Ba Đồn79.6 km²4.3% of basin
- 54.6 km²3.0% of basin
- 26.7 km²1.5% of basin
- 2.4 km²0.1% of basin
4 intersecting protected areas
Phong Nha-Ke Bang National Park and Hin Nam No National Park
IUCN Not ApplicableWorld Heritage Site (natural or mixed)
886.36 km² overlap
Phong Nha-Ke Bang
IUCN IINational Park
810.70 km² overlap
Hin Nam No
IUCN IINational Park
51.64 km² overlap
Kounxe Nongma
IUCN VINational Protected Area
1.54 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 360 distinct species · 14 299 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 22 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 Son : 18 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 20 interactions GloBI sur 3 types (connectance 8.7%, filtre Serrano α=0.2). 4 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°
23,5°C
Annual rain
2 346mm
Moisture idx (CMI)
0,42
Runoff
1 310mm/an
PET
1 348mm
AET
1 173mm
Mean slope
13,8°
Water table
464cm
Forest
56%
Crops
36%
Urban
1%
Protected
24%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)