HydroBASINS lev08 watershed · #2080254960
Bassin de Перетна
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 : Krestetskiy rayon, Lyubytinskiy rayon, Okulovskiy rayon, Valdayskiy rayon
Sub-basin area
835km²
Upstream area
835km²
Discharge
7,8m³/s
Mean elev.
176m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
4 dept-equivalent regions (GADM L2)
- 750.5 km²89.4% of basin
- 75.6 km²9.0% of basin
- 13.2 km²1.6% of basin
- 0.0 km²0.0% of basin
8 intersecting protected areas
Valdaiskiy
IUCN Not ApplicableUNESCO-MAB Biosphere Reserve
194.77 km² overlap
Natural Monument
26.68 km² overlap
Opechenskie gory
IUCN IIINatural Monument
4.07 km² overlap
Holmy "Bal`dazary"
IUCN IIINatural Monument
3.15 km² overlap
Natural Monument
1.70 km² overlap
Urochishhe "Lihaya krucha"
IUCN IIINatural Monument
1.28 km² overlap
Rodnik u d. Polishhi
IUCN IIINatural Monument
0.03 km² overlap
Natural Monument
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
496 distinct species · 1 144 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 26 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 Перетна : 18 espèces reliées par 59 interactions GloBI sur 5 types (connectance 18.2%, 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°
3,4°C
Annual rain
707mm
Moisture idx (CMI)
0,13
Runoff
299mm/an
PET
615mm
AET
475mm
Mean slope
1,4°
Water table
88cm
Forest
91%
Crops
3%
Urban
2%
Protected
28%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)