HydroBASINS lev08 watershed · #3080243240
Bassin de Ольтян
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 1 administrative regions : Anadyrskiy rayon
Sub-basin area
1 349,6km²
Upstream area
1 349,6km²
Discharge
13,15m³/s
Mean elev.
59m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
1 dept-equivalent regions (GADM L2)
- 1358.4 km²100.0% of basin
1 intersecting protected areas
Ust`-Tanyurerskij
IUCN IVState Natural Zakaznik
263.80 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
24 distinct species · 32 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°
-8,4°C
Annual rain
295mm
Moisture idx (CMI)
-0,19
Runoff
307mm/an
PET
365mm
AET
253mm
Mean slope
4,9°
Water table
104cm
Forest
5%
Crops
0%
Urban
0%
Protected
19%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)