HydroBASINS lev08 watershed · #3080453900
Bassin de Олёкма
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 : Olekminskiy rayon
Sub-basin area
550,9km²
Upstream area
109 315,4km²
Discharge
1 041,81m³/s
Mean elev.
395m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Олёкма2275 km²
- Bassin de Олёкма1761 km²
1 dept-equivalent regions (GADM L2)
- 553.9 km²100.0% of basin
1 intersecting protected areas
Olekminskij
IUCN IaState Natural Zapovednik
432.45 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
191 distinct species · 364 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 35 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 Олёкма : 23 espèces reliées par 78 interactions GloBI sur 5 types (connectance 11.1%, filtre Serrano α=0.2). 15 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°
-6,5°C
Annual rain
371mm
Moisture idx (CMI)
-0,35
Runoff
218mm/an
PET
575mm
AET
326mm
Mean slope
4,8°
Water table
148cm
Forest
91%
Crops
0%
Urban
0%
Protected
74%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)