HydroBASINS lev08 watershed · #2080225000
Bassin de Мегрега
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 : Lodeynopol'skiy rayon, Olonetskiy rayon, Pitkyarantskiy, Podporozhskiy rayon, Slantsevskiy rayon
Sub-basin area
1 726,3km²
Upstream area
1 726,3km²
Discharge
15,84m³/s
Mean elev.
43m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
5 dept-equivalent regions (GADM L2)
- 1412.3 km²81.3% of basin
- 223.0 km²12.8% of basin
- 92.1 km²5.3% of basin
- 7.2 km²0.4% of basin
- 1.5 km²0.1% of basin
9 intersecting protected areas
Oloneckij
IUCN IVState Natural Zakaznik
26.70 km² overlap
Boloto Levotsuo
IUCN IIINatural Monument
8.77 km² overlap
Boloto Kohtusuo
IUCN IIINatural Monument
8.63 km² overlap
Svir Delta
IUCN Not ReportedWetland of International Importance (Ramsar Site)
6.78 km² overlap
Boloto CHilim-boloto
IUCN IIINatural Monument
6.18 km² overlap
Boloto u reki Olonka
IUCN IIINatural Monument
3.09 km² overlap
Boloto Maloe Sarmyagskoe
IUCN IIINatural Monument
0.93 km² overlap
Andrusovo
IUCN IVState Natural Zakaznik
0.71 km² overlap
CHimil`skaya polyana
IUCN IIINatural Monument
0.19 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
876 distinct species · 6 817 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 39 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 Мегрега : 29 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 77 interactions GloBI sur 4 types (connectance 10.4%, filtre Serrano α=0.2). 10 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°
2,9°C
Annual rain
672mm
Moisture idx (CMI)
0,19
Runoff
298mm/an
PET
544mm
AET
420mm
Mean slope
2,3°
Water table
87cm
Forest
81%
Crops
11%
Urban
0%
Protected
16%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)