HydroBASINS lev08 watershed · #2080341000
Bassin de Ока
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 6 administrative regions : Arsen'evskiy rayon, Bolkhovskiy rayon, Chernskiy rayon, Mtsenskiy rayon, Orlovskiy rayon +1
Sub-basin area
736,8km²
Upstream area
7 149,2km²
Discharge
41,77m³/s
Mean elev.
202m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Орлик1385 km²
- Bassin de Оптуха753 km²
6 dept-equivalent regions (GADM L2)
- Mtsenskiy rayonOrel · Russia511.1 km²69.1% of basin
- Orlovskiy rayonOrel · Russia199.2 km²26.9% of basin
- Zalegoshchenskiy rayonOrel · Russia20.6 km²2.8% of basin
- Bolkhovskiy rayonOrel · Russia7.0 km²1.0% of basin
- Chernskiy rayonTula · Russia1.5 km²0.2% of basin
- Arsen'evskiy rayonTula · Russia0.4 km²0.1% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
421 distinct species · 785 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 30 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 Ока : 23 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 70 interactions GloBI sur 5 types (connectance 16.1%, 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°
5,2°C
Annual rain
626mm
Moisture idx (CMI)
-0,09
Runoff
198mm/an
PET
690mm
AET
504mm
Mean slope
2,1°
Water table
194cm
Forest
4%
Crops
63%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)