HydroBASINS lev08 watershed · #3080347370
Bassin de Улахан-Оннюэс
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 : Katangskiy rayon, Mirninskiy rayon
Sub-basin area
443,9km²
Upstream area
1 746,4km²
Discharge
8,07m³/s
Mean elev.
324m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Огнёкта669 km²
- Bassin de Мархая634 km²
2 dept-equivalent regions (GADM L2)
- Katangskiy rayonIrkutsk · Russia379.8 km²85.0% of basin
- 66.8 km²15.0% of basin
1 intersecting protected areas
Resource Reserve
0.50 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 distinct species · 1 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°
-8,6°C
Annual rain
335mm
Moisture idx (CMI)
-0,34
Runoff
134mm/an
PET
509mm
AET
297mm
Mean slope
4,6°
Water table
79cm
Forest
91%
Crops
0%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)