HydroBASINS lev08 watershed · #2080321410
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 : Aleksinskiy rayon, Dubenskiy rayon, Ferzikovskiy rayon, Kaluga gorsovet, Peremyshl'skiy rayon +1
Sub-basin area
746,1km²
Upstream area
55 880,6km²
Discharge
308,85m³/s
Mean elev.
200m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Ока381 km²
- Bassin de Калужка257 km²
6 dept-equivalent regions (GADM L2)
- 453.9 km²60.6% of basin
- 203.8 km²27.2% of basin
- 47.8 km²6.4% of basin
- Aleksinskiy rayonTula · Russia30.9 km²4.1% of basin
- Dubenskiy rayonTula · Russia11.3 km²1.5% of basin
- Suvorovskiy rayonTula · Russia1.7 km²0.2% of basin
2 intersecting protected areas
Lesnoj massiv Bor
IUCN IIINatural Monument
0.61 km² overlap
Park s. Ahlebinino (Park usab`by Konshina)
IUCN Not ReportedNatural Monument
0.03 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 004 distinct species · 3 580 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 37 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 : 29 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 80 interactions GloBI sur 4 types (connectance 12.0%, 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°
4,8°C
Annual rain
641mm
Moisture idx (CMI)
-0,04
Runoff
205mm/an
PET
665mm
AET
499mm
Mean slope
2,1°
Water table
210cm
Forest
29%
Crops
42%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)