HydroBASINS lev08 watershed · #4080001030
Bassin de Большой Сомон
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 2 administrative regions : Nikolaevskiy rayon, Ul'chskiy rayon
Sub-basin area
1 075,3km²
Upstream area
1 075,3km²
Discharge
0,58m³/s
Mean elev.
132m
Administrative coverage
2 dept-equivalent regions (GADM L2)
- Ul'chskiy rayonKhabarovsk · Russia678.0 km²62.8% of basin
- Nikolaevskiy rayonKhabarovsk · Russia359.5 km²33.3% of basin
2 intersecting protected areas
Laguna Somon
IUCN IVProtected Natural Complex
0.94 km² overlap
Buhta Masolova
IUCN IVProtected Natural Complex
0.56 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
315 distinct species · 601 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 Большой Сомон : 26 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 41 interactions GloBI sur 4 types (connectance 7.8%, filtre Serrano α=0.2). 7 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
589mm
Moisture idx (CMI)
0,09
Runoff
324mm/an
PET
534mm
AET
423mm
Mean slope
5,7°
Water table
120cm
Forest
84%
Crops
0%
Urban
0%
Protected
1%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)