Ontologia

HydroBASINS lev08 watershed · #2080280100

Bassin de Волга

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 : Kalininskiy rayon, Tver'

Pfafstetter: 28367903

Sub-basin area

116,1km²

Upstream area

24 163km²

Discharge

182,77m³/s

Mean elev.

140m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Арефьевка24 km²

▲ Receives from 2 basins

2 dept-equivalent regions (GADM L2)

  • Kalininskiy rayon
    Tver' · Russia
    105.5 km²
    90.4% of basin
  • Tver'
    Tver' · Russia
    11.2 km²
    9.6% of basin

3 intersecting protected areas

Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.

Species present

1 102 distinct species · 4 786 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

4 786 obs · 2 cellules
Obs. / cellule
≥ 3 229
3 229–3 228
3 229–3 228
3 229–3 228
< 3 229

Source : GBIF — observations agrégées par hexagones 0.027° × 0.027° (~22km), filtre précision coordonnée < 10 km. Fond carte : OpenFreeMap · © OpenStreetMap.

Ecological tissue

Sample of 37 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).

RègnesAnimalPlanteChampignonBacterie
RelationsPredationParasitismeSymbiosePollinisation
StatutEn dangerVulnérableProtégéeEndémique

Indicateurs du tissu écologique

Tissu écologique de Bassin de Волга : 25 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 94 interactions GloBI sur 5 types (connectance 14.1%, filtre Serrano α=0.2). 12 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
37
Interactions affichées
94
Connectance
0.141
Patrimoniales
1
Plus dense que (national)0 %(top 100%)

Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).

Hydroclimate (BasinATLAS lev08)

Mean T°

4,2°C

Annual rain

611mm

Moisture idx (CMI)

-0,03

Runoff

215mm/an

PET

631mm

AET

479mm

Mean slope

1,0°

Water table

67cm

Forest

38%

Crops

25%

Urban

25%

Protected

0%

HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)