HydroBASINS lev08 watershed · #3080481520
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
159,9km²
Upstream area
99 437,6km²
Discharge
966,83m³/s
Mean elev.
603m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Олёкма1443 km²
- Bassin de Тас-Меле1358 km²
1 dept-equivalent regions (GADM L2)
- 160.7 km²100.0% of basin
1 intersecting protected areas
WWF-Saha (CHaruoda)
IUCN VIResource Reserve
81.34 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
121 distinct species · 2 094 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 38 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 : 29 espèces dont 3 patrimoniales (LR IUCN CR/EN/VU) reliées par 55 interactions GloBI sur 5 types (connectance 7.8%, filtre Serrano α=0.2). 9 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°
-7,1°C
Annual rain
400mm
Moisture idx (CMI)
-0,29
Runoff
247mm/an
PET
563mm
AET
349mm
Mean slope
9,5°
Water table
255cm
Forest
86%
Crops
0%
Urban
0%
Protected
58%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)