HydroBASINS lev08 watershed · #2080279070
Bassin de Тверца
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 : Spirovskiy rayon, Torzhok, Torzhokskiy rayon
Sub-basin area
750km²
Upstream area
4 692,7km²
Discharge
32,51m³/s
Mean elev.
173m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Тверца1515 km²
- Bassin de Осуга96 km²
3 dept-equivalent regions (GADM L2)
- Torzhokskiy rayonTver' · Russia707.6 km²93.9% of basin
- Spirovskiy rayonTver' · Russia44.8 km²5.9% of basin
- 1.3 km²0.2% of basin
8 intersecting protected areas
Boloto Kuplenoe
IUCN IVState Natural Zakaznik
8.60 km² overlap
Les u d. Novoe Vishen`e
IUCN IVState Natural Zakaznik
2.06 km² overlap
State Natural Zakaznik
1.93 km² overlap
State Natural Zakaznik
0.86 km² overlap
Boloto Bol`shoj Moh
IUCN IVState Natural Zakaznik
0.44 km² overlap
Natural Monument
0.26 km² overlap
Boloto Ushakovskoe
IUCN IVState Natural Zakaznik
0.11 km² overlap
Park Gruziny
IUCN Not ReportedNatural Monument
0.10 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
842 distinct species · 4 810 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 32 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 Тверца : 25 espèces reliées par 76 interactions GloBI sur 5 types (connectance 15.3%, filtre Serrano α=0.2). 7 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°
4,0°C
Annual rain
621mm
Moisture idx (CMI)
-0,01
Runoff
211mm/an
PET
627mm
AET
481mm
Mean slope
1,2°
Water table
99cm
Forest
60%
Crops
35%
Urban
4%
Protected
1%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)