HydroBASINS lev08 watershed · #2080301370
Bassin de Западная Двина
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 : Demidovskiy rayon, Velizhskiy rayon
Sub-basin area
161,3km²
Upstream area
17 132,1km²
Discharge
138,58m³/s
Mean elev.
184m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Сертейка192 km²
- Bassin de Западная Двина17 km²
2 dept-equivalent regions (GADM L2)
- Velizhskiy rayonSmolensk · Russia155.3 km²95.8% of basin
- Demidovskiy rayonSmolensk · Russia6.7 km²4.2% of basin
2 intersecting protected areas
Smolemsk Lakeland
IUCN Not ApplicableUNESCO-MAB Biosphere Reserve
3.59 km² overlap
Ozero CHeplinskoe
IUCN IIINatural Monument
2.14 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
74 distinct species · 111 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 Западная Двина : 27 espèces reliées par 44 interactions GloBI sur 4 types (connectance 9.5%, filtre Serrano α=0.2). 4 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°
4,8°C
Annual rain
638mm
Moisture idx (CMI)
-0,01
Runoff
254mm/an
PET
647mm
AET
491mm
Mean slope
1,3°
Water table
130cm
Forest
58%
Crops
12%
Urban
0%
Protected
2%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)