HydroBASINS lev08 watershed · #2080252670
Bassin de Звана
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 : Sandovskiy rayon, Ustyuzhenskiy rayon, Ves'egonskiy rayon, Water body
Sub-basin area
1 445,7km²
Upstream area
1 445,8km²
Discharge
9,49m³/s
Mean elev.
150m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
4 dept-equivalent regions (GADM L2)
- Ustyuzhenskiy rayonVologda · Russia509.4 km²35.0% of basin
- Sandovskiy rayonTver' · Russia474.7 km²32.7% of basin
- Ves'egonskiy rayonTver' · Russia444.5 km²30.6% of basin
- Water bodyTver' · Russia24.8 km²1.7% of basin
7 intersecting protected areas
State Natural Zakaznik
114.75 km² overlap
State Natural Zakaznik
37.27 km² overlap
Boloto o1 Samojlovskoe
IUCN IVState Natural Zakaznik
21.40 km² overlap
Boloto Kuzovinskoe
IUCN IIINatural Monument
5.56 km² overlap
State Natural Zakaznik
5.14 km² overlap
State Natural Zakaznik
3.80 km² overlap
State Natural Zakaznik
0.11 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
735 distinct species · 2 011 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 36 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 Звана : 27 espèces reliées par 103 interactions GloBI sur 6 types (connectance 12.6%, filtre Serrano α=0.2). 14 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°
3,3°C
Annual rain
617mm
Moisture idx (CMI)
0,01
Runoff
207mm/an
PET
608mm
AET
465mm
Mean slope
1,1°
Water table
94cm
Forest
77%
Crops
10%
Urban
0%
Protected
16%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)