HydroBASINS lev08 watershed · #3080639380
Bassin de Олха
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 : Irkutskiy rayon, Shelekhov, Shelekhovskiy rayon, Slyudyanskiy rayon
Sub-basin area
644,1km²
Upstream area
644,1km²
Discharge
6,35m³/s
Mean elev.
707m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
4 dept-equivalent regions (GADM L2)
- Irkutskiy rayonIrkutsk · Russia613.0 km²94.8% of basin
- Slyudyanskiy rayonIrkutsk · Russia25.4 km²3.9% of basin
- 8.1 km²1.2% of basin
- Shelekhovskiy rayonIrkutsk · Russia0.1 km²0.0% of basin
5 intersecting protected areas
Lake Baikal
IUCN Not ApplicableWorld Heritage Site (natural or mixed)
19.77 km² overlap
Populyaciya kalipso lukovichnoj
IUCN IIINatural Monument
0.13 km² overlap
Kompleks skal Idol
IUCN IIINatural Monument
0.10 km² overlap
Skal`nyj ostanec Vityaz`
IUCN IIINatural Monument
0.03 km² overlap
Natural Monument
0.02 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 194 distinct species · 6 485 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 21 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 Олха : 17 espèces reliées par 24 interactions GloBI sur 3 types (connectance 11.4%, filtre Serrano α=0.2). 4 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°
-0,9°C
Annual rain
660mm
Moisture idx (CMI)
-0,03
Runoff
289mm/an
PET
677mm
AET
531mm
Mean slope
6,3°
Water table
130cm
Forest
94%
Crops
0%
Urban
4%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)