HydroBASINS lev08 watershed · #3080616440
Bassin de Булга
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 3 administrative regions : Bayandayevskiy rayon, Kachugskiy rayon, Ol'khonskiy rayon
Sub-basin area
1 200,1km²
Upstream area
1 200,1km²
Discharge
8,18m³/s
Mean elev.
765m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
3 dept-equivalent regions (GADM L2)
- Bayandayevskiy rayonIrkutsk · Russia770.6 km²63.9% of basin
- Ol'khonskiy rayonIrkutsk · Russia434.4 km²36.1% of basin
- Kachugskiy rayonIrkutsk · Russia0.0 km²0.0% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
292 distinct species · 532 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 22 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 Булга : 16 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 28 interactions GloBI sur 4 types (connectance 12.1%, 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°
-3,0°C
Annual rain
395mm
Moisture idx (CMI)
-0,38
Runoff
185mm/an
PET
636mm
AET
347mm
Mean slope
3,3°
Water table
54cm
Forest
55%
Crops
0%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)