HydroBASINS lev08 watershed · #2080261470
Bassin de Валдайка
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 : Bologovskiy rayon, Borovichskiy rayon, Okulovskiy rayon, Valdayskiy rayon
Sub-basin area
921,1km²
Upstream area
921,1km²
Discharge
8,45m³/s
Mean elev.
199m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
4 dept-equivalent regions (GADM L2)
- 514.5 km²55.6% of basin
- 206.0 km²22.2% of basin
- 166.4 km²18.0% of basin
- Bologovskiy rayonTver' · Russia39.1 km²4.2% of basin
9 intersecting protected areas
Valdaiskiy
IUCN Not ApplicableUNESCO-MAB Biosphere Reserve
490.80 km² overlap
Natural Monument
9.15 km² overlap
Les vokrug oz. Koshkino
IUCN IIINatural Monument
3.35 km² overlap
Boloto Hmelevskoe
IUCN IVState Natural Zakaznik
2.77 km² overlap
Boloto Beloe
IUCN IVState Natural Zakaznik
1.44 km² overlap
Les vokrug oz. Surok
IUCN IIINatural Monument
1.03 km² overlap
Les vokrug oz. Mstinec
IUCN IIINatural Monument
0.84 km² overlap
Boloto Ostrye Kletki
IUCN IVState Natural Zakaznik
0.80 km² overlap
Boloto Krasnoyasenskoe
IUCN IVState Natural Zakaznik
0.09 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 107 distinct species · 6 490 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 Валдайка : 24 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 83 interactions GloBI sur 5 types (connectance 15.7%, filtre Serrano α=0.2). 9 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°
3,4°C
Annual rain
688mm
Moisture idx (CMI)
0,11
Runoff
286mm/an
PET
615mm
AET
475mm
Mean slope
1,4°
Water table
88cm
Forest
84%
Crops
4%
Urban
1%
Protected
54%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)