HydroBASINS lev08 watershed · #4080152450
Bassin de Онон
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 3 administrative regions across 2 countries : Bayan-Uul, Dadal, Kyrinskiy rayon
Sub-basin area
202,6km²
Upstream area
202,6km²
Discharge
0,56m³/s
Mean elev.
1 102m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
3 dept-equivalent regions (GADM L2)
- 117.8 km²57.9% of basin
- 83.1 km²40.9% of basin
- 2.4 km²1.2% of basin
3 intersecting protected areas
Gornaya step`
IUCN IVState Natural Zakaznik
17.37 km² overlap
Onon-Balj /B/
IUCN IINational Park
12.08 km² overlap
Onon-Balj /A/
IUCN IINational Park
0.28 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
18 distinct species · 29 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°
-0,8°C
Annual rain
363mm
Moisture idx (CMI)
-0,51
Runoff
90mm/an
PET
745mm
AET
324mm
Mean slope
8,8°
Water table
230cm
Forest
30%
Crops
10%
Urban
0%
Protected
6%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)