HydroBASINS lev08 watershed · #2080261500
Bassin de Березайка
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 : Bologovskiy rayon, Okulovskiy rayon
Sub-basin area
259,6km²
Upstream area
1 334,2km²
Discharge
11,89m³/s
Mean elev.
174m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Березайка386 km²
- Bassin de Коломенка263 km²
2 dept-equivalent regions (GADM L2)
- Bologovskiy rayonTver' · Russia257.7 km²98.8% of basin
- 3.2 km²1.2% of basin
9 intersecting protected areas
Boloto Udal`-Salodozhskoe
IUCN IVState Natural Zakaznik
23.86 km² overlap
Boloto Beloe
IUCN IVState Natural Zakaznik
7.78 km² overlap
State Natural Zakaznik
6.32 km² overlap
Les vokrug oz. Hvoshnya
IUCN IIINatural Monument
3.31 km² overlap
Natural Monument
2.64 km² overlap
Boloto Svyatoe
IUCN IVState Natural Zakaznik
1.94 km² overlap
Boloto Raguevskoe
IUCN IVState Natural Zakaznik
1.77 km² overlap
Boloto Linevskoe
IUCN IVState Natural Zakaznik
0.74 km² overlap
Natural Monument
0.31 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
234 distinct species · 427 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 Березайка : 23 espèces reliées par 52 interactions GloBI sur 7 types (connectance 9.3%, 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°
3,5°C
Annual rain
662mm
Moisture idx (CMI)
0,07
Runoff
275mm/an
PET
616mm
AET
471mm
Mean slope
1,0°
Water table
53cm
Forest
87%
Crops
5%
Urban
0%
Protected
6%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)