HydroBASINS lev08 watershed · #2080260110
Bassin de Съежа
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, Moshenskiy rayon, Udomel'skiy rayon
Sub-basin area
1 100,4km²
Upstream area
1 100,4km²
Discharge
8,5m³/s
Mean elev.
170m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
4 dept-equivalent regions (GADM L2)
- Udomel'skiy rayonTver' · Russia872.8 km²78.9% of basin
- 164.8 km²14.9% of basin
- 67.8 km²6.1% of basin
- Bologovskiy rayonTver' · Russia0.7 km²0.1% of basin
17 intersecting protected areas
State Natural Zakaznik
423.23 km² overlap
Udomel`skij
IUCN IVState Natural Zakaznik
78.05 km² overlap
State Natural Zakaznik
21.22 km² overlap
Pereluchskij
IUCN IVState Natural Zakaznik
17.62 km² overlap
Boloto u d. Lipny
IUCN IVState Natural Zakaznik
11.32 km² overlap
Boloto u d. Boglaevo
IUCN IVState Natural Zakaznik
10.38 km² overlap
Boloto Ohlarevskoe
IUCN IVState Natural Zakaznik
9.13 km² overlap
Boloto Navolok-1
IUCN IVState Natural Zakaznik
8.86 km² overlap
Boloto Terehovskoe
IUCN IVState Natural Zakaznik
7.57 km² overlap
8 more protected areassorted by overlap area
Boloto u d. Filipkovo
IUCN IVState Natural Zakaznik
5.79 km² overlap
Boloto u d. Kuznechiki
IUCN IVState Natural Zakaznik
4.41 km² overlap
Natural Monument
3.06 km² overlap
Lesnye nasazhdeniya vokrug lesnogo ozera v kvartale 90
IUCN Not ReportedNatural Monument
1.78 km² overlap
Boloto Maksimovskoe
IUCN IVState Natural Zakaznik
0.22 km² overlap
Natural Monument
0.08 km² overlap
Park Luben`kino
IUCN Not ReportedNatural Monument
0.07 km² overlap
Boloto Kichigi
IUCN IVState Natural Zakaznik
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
854 distinct species · 10 969 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 Съежа : 25 espèces reliées par 37 interactions GloBI sur 3 types (connectance 7.0%, 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°
3,5°C
Annual rain
638mm
Moisture idx (CMI)
0,04
Runoff
240mm/an
PET
614mm
AET
472mm
Mean slope
0,9°
Water table
73cm
Forest
75%
Crops
13%
Urban
1%
Protected
30%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)