HydroBASINS lev08 watershed · #4081008850
Bassin de Ngòi Biếc
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 : Bắc Quang, Hàm Yên, Lục Yên, Yên Bình
Sub-basin area
330km²
Upstream area
330km²
Discharge
12,58m³/s
Mean elev.
203m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
4 dept-equivalent regions (GADM L2)
- 218.0 km²66.2% of basin
- 104.9 km²31.9% of basin
- 4.5 km²1.4% of basin
- 1.8 km²0.5% of basin
1 intersecting protected areas
Thac Ba
IUCN VCultural and Historical Site
20.98 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
5 distinct species · 6 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°
22,8°C
Annual rain
1 798mm
Moisture idx (CMI)
0,24
Runoff
1 188mm/an
PET
1 359mm
AET
1 136mm
Mean slope
11,2°
Water table
438cm
Forest
0%
Crops
15%
Urban
4%
Protected
6%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)