HydroBASINS lev08 watershed · #2080292470
Bassin de Большая Кокшага
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 : Cheboksarskiy rayon, Mariinsko-Posadskiy rayon, Medvedevskiy rayon, Zvenigovskiy rayon
Sub-basin area
899,7km²
Upstream area
6 480,8km²
Discharge
23,62m³/s
Mean elev.
94m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Чернушка339 km²
- Bassin de Большая Кокшага144 km²
4 dept-equivalent regions (GADM L2)
- 638.7 km²70.7% of basin
- 166.1 km²18.4% of basin
- 92.8 km²10.3% of basin
- 6.4 km²0.7% of basin
5 intersecting protected areas
Lebedan`
IUCN IVState Natural Zakaznik
16.66 km² overlap
Zavolzhskij
IUCN IVState Natural Zakaznik
12.04 km² overlap
Boloto Martyn
IUCN IIINatural Monument
6.04 km² overlap
Ozero Bol`shoj Martyn
IUCN IIINatural Monument
0.64 km² overlap
Natural Monument
0.55 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
934 distinct species · 3 409 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 33 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 Большая Кокшага : 26 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 71 interactions GloBI sur 4 types (connectance 13.4%, 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°
3,6°C
Annual rain
560mm
Moisture idx (CMI)
-0,11
Runoff
98mm/an
PET
631mm
AET
454mm
Mean slope
0,8°
Water table
62cm
Forest
97%
Crops
1%
Urban
0%
Protected
10%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)