HydroBASINS lev08 watershed · #2080267290
Bassin de Пола
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 9 administrative regions : Andreapol'skiy rayon, Demyanskiy rayon, Kholmskiy rayon, Marevskiy rayon, Ostashkovskiy rayon +4
Sub-basin area
3 786,9km²
Upstream area
3 787km²
Discharge
33,86m³/s
Mean elev.
161m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
9 dept-equivalent regions (GADM L2)
- 1709.9 km²44.9% of basin
- 1621.9 km²42.6% of basin
- 176.1 km²4.6% of basin
- 121.3 km²3.2% of basin
- 99.1 km²2.6% of basin
- Ostashkovskiy rayonTver' · Russia39.9 km²1.0% of basin
- Andreapol'skiy rayonTver' · Russia28.6 km²0.8% of basin
- 4.8 km²0.1% of basin
1 moreFull L2 list
- Penovskiy rayon4.5 km² · 0.1%
11 intersecting protected areas
Valdaiskiy
IUCN Not ApplicableUNESCO-MAB Biosphere Reserve
331.83 km² overlap
Istok reki Volgi
IUCN IVState Natural Zakaznik
41.28 km² overlap
Boloto Mezhnik
IUCN IVState Natural Zakaznik
11.07 km² overlap
State Natural Zakaznik
8.30 km² overlap
Krasnenskij Bor
IUCN IIINatural Monument
1.94 km² overlap
Natural Monument
0.94 km² overlap
Natural Monument
0.27 km² overlap
Rodnik - 0,5 km ot d. Tverdovo
IUCN IIINatural Monument
0.24 km² overlap
Pejzazhnyj park "Hlebalovo"
IUCN IIINatural Monument
0.09 km² overlap
2 more protected areassorted by overlap area
Natural Monument
0.07 km² overlap
Klyukvennoe boloto Velil`skoe
IUCN IIINatural Monument
0.06 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
432 distinct species · 992 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 33 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 Пола : 22 espèces reliées par 80 interactions GloBI sur 5 types (connectance 14.3%, filtre Serrano α=0.2). 12 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°
3,9°C
Annual rain
644mm
Moisture idx (CMI)
0,03
Runoff
283mm/an
PET
627mm
AET
480mm
Mean slope
1,3°
Water table
99cm
Forest
89%
Crops
7%
Urban
0%
Protected
10%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)