HydroBASINS lev08 watershed · #2080297790
Bassin de Обша
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 : Bel'skiy rayon, Nelidovskiy rayon, Oleninskiy rayon, Sychevskiy rayon
Sub-basin area
1 114,1km²
Upstream area
1 114,1km²
Discharge
7,84m³/s
Mean elev.
238m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
4 dept-equivalent regions (GADM L2)
- Bel'skiy rayonTver' · Russia547.3 km²48.9% of basin
- Oleninskiy rayonTver' · Russia458.0 km²40.9% of basin
- Nelidovskiy rayonTver' · Russia74.1 km²6.6% of basin
- Sychevskiy rayonSmolensk · Russia40.0 km²3.6% of basin
2 intersecting protected areas
Nesterovskij
IUCN IVState Natural Zakaznik
141.28 km² overlap
Istok r. Dnepr
IUCN IVState Landscape Zakaznik
86.77 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
30 distinct species · 31 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 18 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 Обша : 18 espèces reliées par 14 interactions GloBI sur 4 types (connectance 9.2%, filtre Serrano α=0.2).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydroclimate (BasinATLAS lev08)
Mean T°
4,1°C
Annual rain
645mm
Moisture idx (CMI)
0,02
Runoff
222mm/an
PET
633mm
AET
489mm
Mean slope
1,3°
Water table
116cm
Forest
74%
Crops
10%
Urban
0%
Protected
6%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)