HydroBASINS lev08 watershed · #2080298280
Bassin de Ельша
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 5 administrative regions : Demidovskiy rayon, Dukhovshchinskiy rayon, Velizhskiy rayon, Zapadnodvinskiy rayon, Zharkovskiy rayon
Sub-basin area
1 483,1km²
Upstream area
1 483,1km²
Discharge
12,18m³/s
Mean elev.
198m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
5 dept-equivalent regions (GADM L2)
- Demidovskiy rayonSmolensk · Russia751.5 km²50.4% of basin
- Zharkovskiy rayonTver' · Russia468.3 km²31.4% of basin
- Dukhovshchinskiy rayonSmolensk · Russia214.1 km²14.4% of basin
- Zapadnodvinskiy rayonTver' · Russia54.9 km²3.7% of basin
- Velizhskiy rayonSmolensk · Russia1.2 km²0.1% of basin
5 intersecting protected areas
Smolemsk Lakeland
IUCN Not ApplicableUNESCO-MAB Biosphere Reserve
1029.50 km² overlap
Torfyanik Puzekinskij Moh
IUCN IIINatural Monument
6.50 km² overlap
Torfyanik Kolodezskij Moh
IUCN IIINatural Monument
4.79 km² overlap
Ozero Velisto
IUCN IIINatural Monument
3.57 km² overlap
Ozero Knyazhnoe
IUCN IIINatural Monument
0.19 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 516 distinct species · 12 767 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 33 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 Ельша : 28 espèces reliées par 66 interactions GloBI sur 3 types (connectance 12.5%, 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°
4,7°C
Annual rain
643mm
Moisture idx (CMI)
0,00
Runoff
259mm/an
PET
642mm
AET
491mm
Mean slope
1,0°
Water table
84cm
Forest
95%
Crops
2%
Urban
0%
Protected
69%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)