HydroBASINS lev08 watershed · #2080273560
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 5 administrative regions : Kuvshinovskiy rayon, Likhoslavl'skiy rayon, Spirovskiy rayon, Torzhokskiy rayon, Vyshnevolotskiy rayon
Sub-basin area
1 514,6km²
Upstream area
1 514,6km²
Discharge
10,37m³/s
Mean elev.
181m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
5 dept-equivalent regions (GADM L2)
- Vyshnevolotskiy rayonTver' · Russia1150.5 km²75.6% of basin
- Spirovskiy rayonTver' · Russia366.7 km²24.1% of basin
- Kuvshinovskiy rayonTver' · Russia4.5 km²0.3% of basin
- Torzhokskiy rayonTver' · Russia0.4 km²0.0% of basin
- Likhoslavl'skiy rayonTver' · Russia0.1 km²0.0% of basin
20 intersecting protected areas
State Natural Zakaznik
40.42 km² overlap
State Natural Zakaznik
31.96 km² overlap
State Natural Zakaznik
29.55 km² overlap
State Natural Zakaznik
29.19 km² overlap
Natural Monument
27.23 km² overlap
Boloto Afim`ino
IUCN IVState Natural Zakaznik
21.92 km² overlap
Boloto Revenka
IUCN IVState Natural Zakaznik
20.82 km² overlap
Boloto Myakishevo
IUCN IVState Natural Zakaznik
9.01 km² overlap
Vojbutskaya gora
IUCN IIINatural Monument
8.55 km² overlap
11 more protected areassorted by overlap area
Boloto Gavrovo
IUCN IVState Natural Zakaznik
8.33 km² overlap
Urochishhe Bobovo
IUCN IIINatural Monument
5.96 km² overlap
Boloto Ivan`kovskoe
IUCN IVState Natural Zakaznik
5.65 km² overlap
State Natural Zakaznik
3.92 km² overlap
Boloto Redushki
IUCN IVState Natural Zakaznik
3.69 km² overlap
Boloto SHubinskoe
IUCN IVState Natural Zakaznik
1.20 km² overlap
State Natural Zakaznik
0.93 km² overlap
Zelyonaya zona Bab`e
IUCN IIINatural Monument
0.79 km² overlap
CHerencovskij
IUCN IVState Natural Zakaznik
0.22 km² overlap
Boloto Buholovskoe
IUCN IVState Natural Zakaznik
0.05 km² overlap
Lesnye massivy u oz. Volkovskoe
IUCN IIINatural Monument
0.01 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
536 distinct species · 1 435 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 23 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 : 16 espèces reliées par 42 interactions GloBI sur 4 types (connectance 15.2%, filtre Serrano α=0.2). 8 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°
3,7°C
Annual rain
625mm
Moisture idx (CMI)
0,01
Runoff
214mm/an
PET
620mm
AET
477mm
Mean slope
1,2°
Water table
89cm
Forest
80%
Crops
10%
Urban
1%
Protected
22%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)