HydroBASINS lev08 watershed · #2080263120
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 3 administrative regions : Bologovskiy rayon, Okulovskiy rayon, Valdayskiy rayon
Sub-basin area
385,6km²
Upstream area
811,8km²
Discharge
7,39m³/s
Mean elev.
193m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Березайка289 km²
- Bassin de Березайка137 km²
3 dept-equivalent regions (GADM L2)
- Bologovskiy rayonTver' · Russia240.8 km²62.1% of basin
- 146.7 km²37.9% of basin
- 0.1 km²0.0% of basin
8 intersecting protected areas
Valdaiskiy
IUCN Not ApplicableUNESCO-MAB Biosphere Reserve
17.39 km² overlap
Valdajskij
IUCN IVState Natural Zakaznik
11.77 km² overlap
Boloto Velikoe
IUCN IVState Natural Zakaznik
7.81 km² overlap
Boloto Linevskoe
IUCN IVState Natural Zakaznik
5.85 km² overlap
Natural Monument
2.00 km² overlap
Les po reke Ederka
IUCN IIINatural Monument
1.38 km² overlap
Boloto Gluhoe
IUCN IVState Natural Zakaznik
1.24 km² overlap
Boloto Beloe
IUCN IVState Natural Zakaznik
0.06 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
258 distinct species · 402 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 25 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 : 21 espèces reliées par 30 interactions GloBI sur 3 types (connectance 9.2%, 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°
3,5°C
Annual rain
671mm
Moisture idx (CMI)
0,08
Runoff
280mm/an
PET
617mm
AET
474mm
Mean slope
1,2°
Water table
62cm
Forest
88%
Crops
7%
Urban
2%
Protected
12%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)