HydroBASINS lev08 watershed · #2080269750
Bassin de Сива
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 4 administrative regions : Bol'shesosnovskiy rayon, Chastinskiy rayon, Ocherskiy rayon, Okhanskiy rayon
Sub-basin area
588km²
Upstream area
588km²
Discharge
4,29m³/s
Mean elev.
204m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
4 dept-equivalent regions (GADM L2)
- 275.4 km²46.6% of basin
- 212.3 km²35.9% of basin
- 74.8 km²12.7% of basin
- 28.5 km²4.8% of basin
2 intersecting protected areas
Ocherskij
IUCN IVState Natural Zakaznik
153.08 km² overlap
Sivinskij el`nik
IUCN IVNature Reserve
2.34 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
392 distinct species · 393 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 24 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 Сива : 13 espèces reliées par 47 interactions GloBI sur 3 types (connectance 17.0%, filtre Serrano α=0.2). 11 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°
1,9°C
Annual rain
607mm
Moisture idx (CMI)
-0,01
Runoff
230mm/an
PET
616mm
AET
449mm
Mean slope
2,7°
Water table
107cm
Forest
73%
Crops
38%
Urban
0%
Protected
26%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)