HydroBASINS lev08 watershed · #3080609830
Bassin de Ока
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 : Okinskiy rayon, Tulunskiy rayon, Zalarinskiy rayon, Ziminskiy rayon
Sub-basin area
2 499,7km²
Upstream area
18 760,4km²
Discharge
166,42m³/s
Mean elev.
1 112m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Урда-Ока1172 km²
- Bassin de Ока3 km²
4 dept-equivalent regions (GADM L2)
- Zalarinskiy rayonIrkutsk · Russia1513.5 km²60.3% of basin
- Ziminskiy rayonIrkutsk · Russia615.4 km²24.5% of basin
- 312.6 km²12.5% of basin
- Tulunskiy rayonIrkutsk · Russia68.6 km²2.7% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
451 distinct species · 585 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 16 species (selected proportionally per kingdom among those with at least one documented interaction here) to keep the graph readable. Hover for details, click to explore the full ecosystem of a species.
ℹ️ The territory contains many more species than displayed and all their documented interactions: the graph is intentionally the structural skeleton (top-N species by composite local score, edges filtered by Serrano 2009 disparity filter α=0.2).
Indicateurs du tissu écologique
Tissu écologique de Bassin de Ока : 14 espèces reliées par 15 interactions GloBI sur 3 types (connectance 7.9%, filtre Serrano α=0.2). 6 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydroclimate (BasinATLAS lev08)
Mean T°
-4,4°C
Annual rain
393mm
Moisture idx (CMI)
-0,34
Runoff
307mm/an
PET
615mm
AET
345mm
Mean slope
14,5°
Water table
379cm
Forest
88%
Crops
1%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)