HydroBASINS lev08 watershed · #4080014510
Bassin de Sông Vai Lai
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 2 administrative regions : Hải Hà, Móng Cái
Sub-basin area
170,9km²
Upstream area
171,1km²
Discharge
7,3m³/s
Mean elev.
127m
Administrative coverage
2 dept-equivalent regions (GADM L2)
- 131.5 km²77.1% of basin
- 39.0 km²22.9% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
8 distinct species · 12 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Not enough documented interactions to build a meaningful graph for this territory.
Hydroclimate (BasinATLAS lev08)
Mean T°
22,5°C
Annual rain
2 383mm
Moisture idx (CMI)
0,47
Runoff
1 325mm/an
PET
1 252mm
AET
1 133mm
Mean slope
9,1°
Water table
357cm
Forest
3%
Crops
11%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)