HydroBASINS lev08 watershed · #2080028310
Bassin de Охта
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 : Gatchinskiy rayon, Sankt-Peterburg gorsovet, Vsevolzhsk, Vsevolzhskiy rayon, Vyborgskiy rayon
Sub-basin area
1 382km²
Upstream area
285 331,2km²
Discharge
2 561,55m³/s
Mean elev.
39m
Administrative coverage
Hydrographic chain
▼ Drains into
Outlet (drains to ocean / endorheic)
▲ Receives from 2 basins
- Bassin de Ижора1445 km²
- Bassin de Чёрная речка117 km²
5 dept-equivalent regions (GADM L2)
- 732.0 km²52.7% of basin
- 630.5 km²45.4% of basin
- 25.8 km²1.9% of basin
- 1.3 km²0.1% of basin
- 0.1 km²0.0% of basin
6 intersecting protected areas
Toksovskij
IUCN IINatural Park
27.44 km² overlap
Koltushskie vysoty
IUCN IIINatural Monument
12.11 km² overlap
Toksovskie vysoty
IUCN IIINatural Monument
0.57 km² overlap
Ozero Veroyarvi
IUCN IVProtected Natural Landscape
0.52 km² overlap
Elagin ostrov
IUCN IIINatural Monument
0.33 km² overlap
Dolina reki Popovki
IUCN IIINatural Monument
0.26 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
4 291 distinct species · 166 245 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 35 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 Охта : 28 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 75 interactions GloBI sur 5 types (connectance 12.6%, filtre Serrano α=0.2). 7 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°
4,6°C
Annual rain
638mm
Moisture idx (CMI)
0,13
Runoff
169mm/an
PET
558mm
AET
430mm
Mean slope
1,4°
Water table
81cm
Forest
39%
Crops
26%
Urban
45%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)