HydroBASINS lev08 watershed · #4080155960
Bassin de Онон
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 : Bayan-Adarga, Dadal, Norovlin
Sub-basin area
1 207,8km²
Upstream area
22 560,4km²
Discharge
42,68m³/s
Mean elev.
1 094m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Онон3552 km²
- Bassin de Онон250 km²
3 dept-equivalent regions (GADM L2)
- 706.9 km²58.3% of basin
- 479.7 km²39.6% of basin
- 24.9 km²2.1% of basin
2 intersecting protected areas
Onon-Balj /A/
IUCN IINational Park
97.32 km² overlap
Onon-Balj /B/
IUCN IINational Park
62.74 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
318 distinct species · 709 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 31 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 Онон : 26 espèces reliées par 45 interactions GloBI sur 5 types (connectance 9.7%, filtre Serrano α=0.2). 5 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°
-0,5°C
Annual rain
353mm
Moisture idx (CMI)
-0,53
Runoff
88mm/an
PET
754mm
AET
315mm
Mean slope
7,4°
Water table
196cm
Forest
13%
Crops
5%
Urban
0%
Protected
13%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)