HydroBASINS lev08 watershed · #2080280280
Bassin de Тьма
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 : Kalininskiy rayon, Kuvshinovskiy rayon, Staritskiy rayon, Torzhokskiy rayon
Sub-basin area
1 773,8km²
Upstream area
1 773,9km²
Discharge
12,36m³/s
Mean elev.
194m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
4 dept-equivalent regions (GADM L2)
- Torzhokskiy rayonTver' · Russia1129.9 km²63.4% of basin
- Staritskiy rayonTver' · Russia474.6 km²26.6% of basin
- Kalininskiy rayonTver' · Russia115.0 km²6.5% of basin
- Kuvshinovskiy rayonTver' · Russia62.9 km²3.5% of basin
12 intersecting protected areas
Bernovskij
IUCN IVState Natural Zakaznik
104.96 km² overlap
Boloto Mel`gubovskoe
IUCN IVState Natural Zakaznik
8.88 km² overlap
State Natural Zakaznik
2.15 km² overlap
Boloto Koshevskoe
IUCN IVState Natural Zakaznik
1.87 km² overlap
Dudenevskij
IUCN IVState Natural Zakaznik
1.85 km² overlap
Boloto Kuplenoe
IUCN IVState Natural Zakaznik
1.44 km² overlap
Park Malinniki
IUCN Not ReportedNatural Monument
0.26 km² overlap
Ozero Denezhnoe
IUCN IIINatural Monument
0.23 km² overlap
Park Pavlovskij
IUCN Not ReportedNatural Monument
0.09 km² overlap
3 more protected areassorted by overlap area
Park Bernovo
IUCN Not ReportedNatural Monument
0.09 km² overlap
Park Kurovo-Pokrovskoe
IUCN Not ReportedNatural Monument
0.06 km² overlap
Park Maricyno
IUCN Not ReportedNatural Monument
0.06 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
653 distinct species · 1 677 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 31 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 Тьма : 26 espèces reliées par 65 interactions GloBI sur 5 types (connectance 14.0%, 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°
4,0°C
Annual rain
628mm
Moisture idx (CMI)
0,00
Runoff
219mm/an
PET
629mm
AET
484mm
Mean slope
1,2°
Water table
96cm
Forest
58%
Crops
26%
Urban
0%
Protected
7%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)